Home » Recipes » Juicy and Guilt-Free Portobello Mushroom Keto Burger

Juicy and Guilt-Free Portobello Mushroom Keto Burger

This post may contain affiliate links. Read my disclosure policy.

This Guilt-Free, quick, and easy to make Portobello Mushroom Keto Burger is super juicy and looks exactly like a real Burger Bun you would expect from a BBQ evening. Fully Grain-Free, Gluten-Free, Low Carb, and perfect for diabetics, this Portobello Mushroom Recipe together with Ground Beef Keto Burger is a must when you start thinking of grilling time. 

Burger with Portobello buns on a wooden board.
Keto Burger

Keto Grilling

Ready for that perfect sumer evening when you can finally get together with your family or friends and have the best ever BBQ?

Keto Book with recipes
Newsletter and Keto Free Ebook

Do not forget to look at our Sugar-Free Marshmallows or Keto Smores Chaffle Recipe to take with you. An make quick and easy grilled shrimp skewers.

Window Keto Shopping

Would you believe most of my recipes ideas come directly from my Window Keto Shopping?

I walk into the shop, mostly groceries or food markets.

 I see something and there at that moment, it goes.

The Recipes start popping into my head and all I can think of is quickly get home and make it and take the photo shots.

Because those photos are what gets me most of the time. Those images of Keto Food looking even better than the full-grain and high Carbs food is. 

Portobello Mushrooms Recipe

The exact same thing happened when I walked into one of the groceries close to our house.

Portobello Mushroom Keto Burger

I have seen those beautifully shaped big brown mushrooms which immediately gave me an idea of bunless burgers we normally make.

I have immediately in my head seen the picture of this beautiful juicy mushroom bun sprinkled with sesame seeds and looking like a real juicy burger bun which everyone is missing in our lifestyle. And then it went.

Our Portobello Mushroom Keto Burger was born. 

All I had to do was make our Bunless Bacon Keto Burger together with Simple Keto Basil Pesto, so I can combine it all together and make a beautiful barbeque evening dinner for my whole family.

Together with our Crispy Keto French Fries you are right in.

Bunless Burger
What are Portobello Mushrooms?

Did you know Portobello Mushrooms are not a specific type of Mushroom? 

Portobello mushrooms are round mushrooms commonly seen in Europe and North America, white and brown in color, and in different sizes. 

They could also be called Swiss brown mushrooms, cremini/crimini mushroom, common mushroom, white mushroom, button mushroom, cultivated mushroom, table mushroom, champignon mushroom, Roman brown mushroom, Italian brown mushroom, chestnut mushroom, or baby Bella.

And that is exactly what got me completely confused. When I bought those portobello mushrooms, I did not look at the name on the package. 

Only after I opened the box to clean the mushrooms, I realized they are called Champignons. 

At that moment, I had no idea what I had bought, and I was not sure what I was going to call them. For a minute, I believed Portobello Mushrooms were some sort of special type, which were not available here.

Only after research, I had to do it on the computer, I have found out that it is just the name of the mushrooms and not a particular type.

How Many Carbs do Mushrooms have?

Did you know that Portobello Mushrooms have got more Potassium than bananas have?

Mushrooms are one of the best vegetables to cook within our lifestyle. They are not only low in carbohydrates but as well on calories.

The flavor you get from mushrooms gives an unforgettable twist to any meal you are preparing with them.

One cup of mushrooms, depending on the exact type, contains only 15 Calories,  2-3g of carb of which 1g is Fiber, and approximately 2g of Protein. 

How do you get the moisture out of the Portobello Mushroom?

Those beautiful big dark brown portobello mushrooms are not only tasty, healthy, and with really few calories and carbohydrates. 

They also contain a lot of moisture. 

To reduce the moisture from portobello mushrooms is to cut the stem and with your spoon or hands scrape the dark grills underneath. 

That is where most of the moisture is and it will help you to get the portobello mushrooms buns more uniformed.

How do you make a Mushroom bun?

As you can see in the video, to make a keto bun out of mushrooms or portobello mushroom is very easy.

All you have to do is get beautifully looking dark brown mushrooms, which you grill to medium-rare and you can decorate.

To make it even more real bun-like looking, you can sprinkle it with sesame seeds as I have done as well.

You can also brush up the top off the portobello buns with barbecue sauce so the sesame seeds hold even better.

How do you grill Portobello mushroom buns?

To grill portobello mushroom buns is pretty easy.

As you see on the video I have used an indoor grill, but you can also use an outdoor grill without any issues.

For my indoor grill, I have two choices where I can either press the button and the top with the grill plates to give the mushrooms a beautiful grill-looking line.

But for the top portobello bun, I have decided I do not want those grills so the bun looks more like real wheat or flour bun. 

I have just closed the grill in a way that the top is not touching the buns.

The same you can do with an outdoor grill where you just close the grill without turning it.

Any of the mushrooms once you place them on the grill will shrink.

To make them like a real bund looking, make sure you grill them only halfway or at least the top of the mushroom.

Keto Burger

How to make Portobello Mushroom Keto Burger?

Kitchen gadgets you might need:

  • Outdoor or indoor grill
  • Bowl for mixing the burger

Ingredients needed:

  • Portobello Mushrooms
  • Keto Burger
  • Basil Pesto
  • Salad leaves
  • Slice of Tomato
  • Slice of cheese
  • Sesame Seeds

*Exact measurements are listed in the recipe card below.

STEP BY STEP INSTRUCTIONS ON MAKING THE BEST PORTOBELLO MUSHROOM KETO BURGER

First Step: Prepare and wash mushrooms

The first step for making the best Portobello Mushroom Keto  Buns is to pick the best looking portobello mushrooms in size as well as shape.

Clean them well and fully dry. 

At the same time decide which mushrooms would go on top of the burger as a bun.

Make sure those once will get grilled only halfway.

Mushroom Keto Burgers

Second Step: Clean the dark Grills and stem

Take out the stem of each mushroom and with your spoon or hands clean all of the dark grills underneath. Those are the ones that retain most of the moisture and are the best to just clean them.

Do not throw the stems or the grills. You can always add them to your keto burger mixture.

Guilt Free Keto Burgers

Third Step: Place Mushrooms on the Grill

Place all of the mushrooms on the grill.

As mushrooms do shrink while grilling, I would suggest grilling the mushrooms first, and depending on the size they end up to, you can then shape your Burgers so they all fit once put together.

Bunless Burger

Fourth Step: Cover

Once you place all of the mushrooms on the grill, cover it with the top. Make sure the top of the grill does not touch the mushrooms otherwise you will get the lines which you do not really want for beautifully looking buns.

Keto Burger

Fifth Step: Start with the base

Once the mushrooms are done you can start assembling the whole keto portobello mushroom burger.

Decide on the most beautiful ones and place them aside.

Pick not so good looking mushrooms, which you can use as the base.

Ground Beef Keto Recipe

Sixth Step: add Veggies and Burger

Once you have the base portobello mushroom on a plate or a wooden serving board, you can start adding your veggies, salad leaves, tomato slices, cheese, bacon, or whatever you wish. 

As you can see I have also added a little bit of basil pesto to give an extra Italian touch to it.

Portobello Mushrooms Recipe

Seventh Step: Top with Portobello Bun

The last step is to top it up with your most beautiful portobello bun. Pick the one you like the most, place it on top of the burger and sprinkle with sesame seeds.

For the sesame seeds to hold, you can brush up the top of the mushroom with a bit of Barbecue sauce.

Portobello Mushrooms

Tips and Tricks: 

  • Bake your mushrooms first as they shrink and then form your burger bun to the size.
  • To get the beautiful Portobello mushroom bun, grill them only halfway.
  • For the sesame seeds to hold better, you can brush up the top of the portobello mushroom with a barbecue sauce at the end.
Mushroom Keto Burgers

FREQUENTLY ASKED QUESTIONS AND ANSWERS

Can you store Portobello Mushroom Keto Burger?

Although it is best to eat your Portobello mushroom Keto Burger directly when fresh and ready, you can also store if you decide to.

Just place them into the sealable container and keep it in the fridge for 1 to 2 days. Not more.

Portobello Mushroom Keto Burger

Can you freeze the whole Keto Burger?

You can certainly freeze any keto burger, but I would suggest doing that separately.

I would just freeze the actual burger, the Ground Beef Keto mixture, and not the mushrooms.

Fresh Portobello mushrooms have a beautiful shape which ones frozen will destroy.

After you will unfreeze the Portobello mushrooms, they will not stay as beautifully looking as fresh.

More Mushroom Recipes

Pin For Later

Ground Beef Keto Burger

Need Support or have Questions? Join our Free Facebook Group.

Follow us on Pinterest, Facebook, Instagram, TikTok, Flipboard, or YouTube.

For weekly New Recipes and a FREE E-Book get into our NEWSLETTER.

Full Recipe with a Print Out Option:

Thank you for giving us a 5 Stars

Burger with Portobello buns on a wooden board.

Portobello Mushroom Keto Burger

Zuzana Paar
4.85 from 13 votes
This Guilt-Free, quick, and easy to make Portobello Mushroom Keto Burger is super juicy and looks exactly like a real Burger Bun you would expect from a BBQ evening. Fully Grain-Free, Gluten-Free, Low Carb, and perfect for diabetics, this Portobello Mushroom Recipe together with Ground Beef Keto Burger is a must when you start thinking of grilling time.
Prep Time 5 minutes
Cook Time 10 minutes
Total Time 15 minutes
Course Main dishes
Cuisine American
Servings 1
Calories 286 kcal

Equipment

Ingredients
  

Instructions
 

  • Prepare and wash mushrooms. Clean them well and fully dry.
  • Take out the stem of each mushroom and with your spoon or hands clean all of the dark grills underneath.
  • Place all of the mushrooms on the grill.
  • Depending on what type of Grill you have, make sure the top of the grill does not touch the mushrooms otherwise you will get the lines which you do not really want for beautifully looking buns.
  • Once the mushrooms are done you can start assembling the whole keto portobello mushroom burger.
  • Place one Portobello as a base on a plate
  • Add all of the vegetabels you like, salad, tomato, cheese, burger etc
  • Top with Portobello Bun
  • Brush up with BBQ sauce and sprinkle with Sesame Seeds

Video

Notes

  • Bake your mushrooms first as they shrink and then form your burger bun to the size.
  • To get the beautiful Portobello mushroom bun, grill them only halfway.
  • For the sesame seeds to hold better, you can brush up the top of the portobello mushroom with a barbecue sauce at the end.

Nutrition

Serving: 1gCalories: 286kcalCarbohydrates: 3gProtein: 19gFat: 21gSaturated Fat: 8gPolyunsaturated Fat: 1gMonounsaturated Fat: 9gTrans Fat: 1gCholesterol: 72mgSodium: 281mgPotassium: 331mgFiber: 1gVitamin A: 7IUVitamin C: 2mgCalcium: 26mgIron: 2mg

Disclaimer

Please note that nutrient values are estimates only. Variations can occur due to product availability and manner of food preparation. Nutrition may vary based on methods of origin, preparation, freshness of ingredients, and other factors.

Tried this recipe?Let us know how it was!

If you are still looking for some Low Carb products, visit our recommended site on Amazon, which we participate in as affiliates. Just click on the image below and all will be revealed.

Amazon Low Carb Keto
Amazon Shop

Ground Beef Keto Recipes

Simple and fast Keto recipe for ground beef and minced meat. Perfect for Keto fast food, always low carb, gluten-free, and grain-free.

Best Homemade Ground Beef Taco Meat Recipe
This Best Homemade Ground Beef Taco Meat Recipe made with 2 Ingredients Only will be your Favorite Easy Delicious Family Meal. Our Homemade Seasoning Blend mixed together with Classic Ground Beef is transformed into Super Moist and Juicy Mexican Beef Recipe is additionally fully Keto, Low Carb, Gluten-Free, Grain-Free and perfect for Diabetics as well.
Check out this recipe
Ground Beef Taco Meat Recipe with cillantro and fresh chilli
Low Carb Spaghetti Bolognese
Low Carb Spaghetti Bolognese is a perfect Keto Dinner, consisting of our Homemade Keto Spaghetti and Low Carb BBQ Sauce with Mince Meat. Fully Gluten-Free, Grain-Free, and the perfect fit for Diabetics, your Keto Diet will be as flavorful as one can only dream of.
Check out this recipe
Keto Spaghetti Sauce served on a white plate
Keto Stuffed Tomatoes Recipe
Super Simple and Easy Baked Keto Stuffed Tomatoes Recipe with Bolognese Sauce that gives you a Perfect Blend of Aroma is one Grilling Idea for your Keto BBQ Night. Fully Gluten-Free, Grain-Free, Low Carb and perfect for Diabetics, these Healthy Stuffed Tomatoes can be served hot or cold, depending on your Taste Buds.
Check out this recipe
Mince Stuffed Tomatoes served on an old silver rounded plate
Keto Taco Salad Bowl with Mexican Ground Beef
Perfectly Homemade and Super Easy Keto Taco Salad Bowl with Mexican Ground Beef made out of Wholesome Ingredients will be your go-to Keto Dinner for every single Taco Tuesday. Fully Gluten-Free, Grain-Free, Low Carb, and perfect for Diabetics, our Edible Keto Salad Bowl is just a little extra touch to the already Healthy Taco Salad you have been craving for.
Check out this recipe
Keto Taco Salad Recipe with Ground Beef on a white stand.
Keto Sausage Recipe
This Keto Sausage Recipe is the simplest and easiest way to make your brats from complete scratch in no time. Fully Low Carb, Gluten-Free, Grain-Free, and Diabetic Friendly, our Homemade Sausage Recipe is made with Natural Casings and no extra gadgets.
Check out this recipe
Low Carb Sausages prepared on the board for baking.
Easy Homemade Ground Beef Keto Tacos
With those Easy Homemade Ground Beef Keto Tacos filled with the right Protein, flavored with Mexican Seasoning and wrapped in the best Almond Flour Cheese Taco Shells, your dinner will be just unforgettable. Fully Gluten-Free, Grain-Free and perfect for Diabetics, Taco Tuesday is going to be more than once a week.
Check out this recipe
Homemade Keto Tacos in a brown basket
Keto Biscuits and Gravy
Let me introduce you to Keto Biscuits and Gravy, Southern Classic Ultimate Breakfast made with our Homemade Low Carb Biscuits and a Flavorful and Creamy Keto Sausage Gravy. Our Gluten-Free Biscuits and Gravy dish is also Grain-Free, Sugar-Free, Diabetic Friendly, and a perfect Keto Recipe for your Brunch or a Keto Meal Plan.
Check out this recipe
Keto Biscuits and Gravy with chives.
Low Carb Lasagna with Ground Beef
Our Simple to Make Low Carb Lasagna with Ground Beef is a perfect Keto Meal you can prepare well in advance and use it as a Meal Prep as well. Fully Keto, Gluten-Free, Grain-Free, and perfect for Diabetics, this High Protein Lasagna Recipe will climb on top of the list for your Keto Cooking.
Check out this recipe
Low Carb Lasagna Bolognese inside the casserole
Baked Sausage and Sauerkraut
My favorite Baked Sausage and Sauerkraut Recipe made with Homemade Low Carb Sausages, and Sauerkraut with its tanginess is one dish you will enjoy even if you are not fond of actual sauerkraut. Fully Keto, Low Carb, Gluten-Free, Grain-Free and Diabetic Friendly, this Roasted Bratwurst together with Sauerkraut is easy to make you surprised.
Check out this recipe
Baked Sausage and Sauerkraut ready to serve.
Keto Stuffed Zucchini Mini Bites
With our Quick and Easy Keto Stuffed Zucchini Mini Bites Recipe you will discover not only your Meal Prep days to be much more smooth but any of your Party will be filled with Keto Appetizer everyone will talk about. Fully Gluten-Free, Grain-Free, Low Carb, and Super Healthy Keto Zucchini Snack will be one favorite dish your kids will ask for regularly.
Check out this recipe
Keto Stuffed Zucchini Cups served as a party food
Keto Bolognese Sauce
This Authentic Homemade Keto Bolognese Sauce Recipe is so versatile that using it only as a Keto Spaghetti Meat Sauce is out of the question. Our Ground Beef Ragu is a great addition to your Keto Meal Prep fully Glute-Free, Grain-Free, and perfect for Diabetics.
Check out this recipe
Low Carb Bolognese Sauce in a cream dish
Quick and Easy Creamy Keto Taco Soup Recipe
This Quick and Easy Creamy Keto Taco Soup Recipe with Mexican flavors made on the stove will be a big part of your Hearty Comfort Food. Fully Gluten-Free, Grain-Free, Low-Carb, Keto, and Diabetic friendly, our Low-Carb Mexican Soup will be your go-to from all the Keto Soup Recipes there are.
Check out this recipe
Quick and Easy Keto Taco Soup Recipe served with taco shells and avocado
Easy Stuffed Cabbage Rolls Recipe
Learn how to make Easy Stuffed Cabbage Rolls Recipe in no time. Those cabbage leaves filled with ground beef mixture and poured over with tomato sauce will be your next go-to dinner, which the whole family loves.
Check out this recipe
Three bowls of cabbage rolls with sauce on a white plate.
Sauerkraut Casserole Recipe with Ground Beef
I am introducing you to our Sauerkraut Casserole Recipe with Ground Beef, a delightful dish combining German sauerkraut casserole with hearty plain beef or sausage meat and lots of cheese. For a vegan twist, swap out the beef with noodles and savor the comforting essence of sauerkraut casserole while enjoying a plant-based delight.
Check out this recipe
A plate of meat and cheese with a fork.
How To Make Keto Burger Mini Bites
Learn How To Make Keto Burger Mini Bites filled with Low Carb Vegetables for your Keto Kid, Brunch, Party, or an Appetizer for a Super Bowl. Fully Low Carb, Gluten-Free, Grain-Free, and Diabetic Friendly, those No Bun Burger Bites will add all the healthiness you need throughout the day.
Check out this recipe
Keto Burgers Mini Bites on a black board
Easy Crunchy Keto Taco Cups Recipe
Those Hard Shell Easy Crunchy Keto Taco Cups Recipe filled with Mexican Flavors and Taco Ground Beef is a perfect Low-Carb Appetizer for your next party or get-together. Entirely Gluten-Free, Low Carb, Grain-Free and perfect for Diabetics, those Low-Carb Taco Cups are an ideal Keto replacement for your Taco Tuesday, Cinco de Mayo, or Tex-Mex Ground Beef Tacos for that matter.
Check out this recipe
Keto Taco Recipe served as an appetizer on a black plate
Keto Stuffed Peppers Recipe With Rice
Learn how to make a delicious Keto Stuffed Peppers Recipe With Rice, ground beef, and tomato sauce for that perfect comforting low-carb dinner. Using either Shirataki rice or cauliflower rice reduces the number of carbs to fit into our lifestyle.
Check out this recipe
Tomato Sauce Keto Stuffed Peppers in a white casserole
Baked Keto Stuffed Eggplant Boats
Those Baked Keto Stuffed Eggplant Boats filled with Mediterranean Flavors bring an ordinary Protein Enriched Meal to another level. Fully Low Carb, Gluten-Free, and Grain-Free, Melanzane brings you that perfect vegetable addition for your BBQ or Grilling evenings.
Check out this recipe
Keto Stuffed Eggplant sprinkled with herbs
Keto Taco Casserole Recipe with Ground Beef
This Keto Taco Casserole Recipe with Mexican Ground Beef is exactly what you need right now to make a perfectly easy, comforting and heartwarming Low-Carb Casserole Dinner for your Taco Tuesday. Fully Gluten-Free, Grain-Free, Low Carb and Keto, this Diabetic friendly Keto Ground Beef Casserole enriched with Mexican Flavors, is a perfect Meal for your next Super Bowl Party.
Check out this recipe
Keto Taco Casserole Recipe with Ground Beef.
Low Carb Meatloaf Recipe with Cheese and Leeks
Quick and Easy Low Carb Meatloaf Recipe with Cheese and Leeks is a perfect idea for a tiny bit different way of making Keto Meatloaf Recipes. With our Fresh, Bright Green, Juicy, and Double Cheesy Ketogenic Meatloaf Recipe that is fully Gluten Free, Grain Free, and perfect for Diabetics, you are going to win with your family the second this dinner is placed on the table.
Check out this recipe
Keto Meatloaf with melted mozzarella.
How To Make Easy Keto Stuffed Bell Peppers
Learn How To Make Easy Keto Stuffed Bell Peppers with Classic Keto Bolognese Sauce containing Ground Beef. This Low Carb, Grain-Free, Gluten-Free, and perfect Rainbow Keto Meal for Diabetics gives you a great option for your Meal Prep or Grilling evening.
Check out this recipe
Keto Stuffed Bell Peppers inside a light blue baking casserole
Portobello Mushroom Keto Burger
This Guilt-Free, quick, and easy to make Portobello Mushroom Keto Burger is super juicy and looks exactly like a real Burger Bun you would expect from a BBQ evening. Fully Grain-Free, Gluten-Free, Low Carb, and perfect for diabetics, this Portobello Mushroom Recipe together with Ground Beef Keto Burger is a must when you start thinking of grilling time.
Check out this recipe
Burger with Portobello buns on a wooden board.
Roasted Keto Pumpkin Meatballs Recipe
Super quick and easy, this Roasted Keto Pumpkin Meatballs Recipe inside a casserole is not only an incredibly delicious fall cozy recipe but will fill up your Autumn Kitchen with a satisfying rosemary aroma. Perfect dish for your Keto Meal Prep, which is Gluten-free, Grain-free, Diabetic Friendly, and a great addition to our Low Carb lifestyle.
Check out this recipe
Keto Meatball Casserole with pumpkins.
Keto Stuffed Mushrooms Appetizer
Learn How To Make Delicious Keto Stuffed Mushrooms Appetizer packed with our Keto Bolognese Sauce and topped with melted cheese. This Quick Keto Party Snack is perfect not only for your Keto Meal Plan or Grilling Season but our fully Gluten-Free, Low Carb and Grain-Free Ground Beef Baked Italian Low Carb Meal can be a great addition to your daily family dinner.
Check out this recipe
Keto Party Stuffed Mushrooms snack on a plate
Bunless Bacon Keto Burger
Indulge in the ultimate BBQ Bacon Burger Recipe made on a grill that promises juicy burgers with a burst of flavor in every bite. This recipe features a flavorful ground beef patty infused with seasoning and ground bacon that you can additionally top with melted cheddar cheese and crispy bacon and served on toasted buns, making it even better than well-known ultimate bacon cheeseburgers.
Check out this recipe
Bacon Burger on a wooden plate
Keto Sausage Gravy
This decadent Breakfast Keto Sausage Gravy recipe with rich flavor has just been transformed from Classic Southern Cuisine into a perfect Low Carb Comfort Food. Entirely Gluten-Free, Grain-Free, and Diabetic Friendly, traditional gravy has been healthified with the same texture and taste but using a low-carb thickener.
Check out this recipe
Keto Sausage Gravy served with chives.
image with 10 sheets for keto meal plan
7 Day Keto Meal Plan
By Zuzana Paar on June 27th, 2020
Photo of author

About Zuzana Paar

Zuzana is the creative force behind this vibrant blog. With passion as a recipe developer, content creator, food writer, movie maker, and photographer, she poured her heart and soul into curating a space brimming with delightful keto and low carb recipes. Join her on this flavorful journey where quick, easy-to-make dishes take center stage, bringing joy and nourishment to your table.

More Posts by this author.

5 Comments on “Juicy and Guilt-Free Portobello Mushroom Keto Burger”

Leave a Comment

Recipe Rating