Skip to Content

Roasted Creamy Keto Tomato Soup Recipe

Our Roasted Creamy Keto Tomato Soup Recipe with Basil and Fresh Beefsteak Tomatoes straight from your Garden will warm you up every time throughout the whole Winter. Quick and Easy to make, this Low Carb Tomato Soup Recipe is not only Grain-Free and Gluten-Free but extremely Tasty and Healthy.

holding a bowl of tomato soup.
tomato soup with basil

Serve together with low carb bread, keto grilled cheese, croutons, or pieces of crunchy keto popcorn.

If you love tomato soup, our easy recipe will get you the best bowl of soup made from complete scratch. This perfect soup is easy and delicious, filled with tomato flavor like never before.

Keto Book with recipes
Newsletter and Keto Free Ebook

Our hearty soup is the best tomato soup I have ever eaten on a low carb keto lifestyle.

This tomato soup is filled with the best beefsteak tomatoes; therefore, our soup is rich and does not need any thickeners.

Keto Tomato Recipes

Before going further, I would like to introduce you to some of my favorite tomato recipes for the keto lifestyle.

Out of all of the keto food, where tomatoes are the main focus, tomato soup is one I always turn to if our kitchen is filled with them.

But I love to make rainbow keto pizza if I get my hand on various colors.

Another great idea is tomato mozzarella baked chicken for that special Italian evening, stuffed tomatoes for brunch or party, or gnocchi with tomatoes and basil if sweet cherry tomatoes are in season.

Beefsteak Tomatoes

Nothing beats Beefsteak tomatoes, in my opinion.

They are super tasty, always in a size of a mega max, and just eating them fresh from your garden with a pinch of salt will make your day.

But as the time comes and they all start to grow, you suddenly realize you have a garden full of them.

You make tomato sauce, cook tomato salsa, try and experiment with low-carb gazpacho, and come up with some tomato bisque.

And then what else?

You start your regular canning process by using all the fresh beefsteak tomatoes, but you feel like trying something new.

What do you do?

Go on the internet and start searching. And then? Suddenly you find this lovely photo of some kind of tomato soup you would like to try. You click and come to my site.

Well, Hello and welcome to our world of Low Carb Living.

In this post, you will learn everything possible to make the best low carb roasted tomato basil soup.

I will guide you through all the steps and try to answer all the questions you might have. All you have to do is to spend a bit of time and read on, so you do not miss any points, just in case.

enjoying Keto Roasted Tomato Soup
Keto tomato soup
Is tomato soup keto friendly?

It is fully low-carb.
When it comes to the keto question, all you have to do is calculate a bit.
To have this easy tomato soup with basil in your strict keto life, you have to ensure you do not eat the whole bowl in one go.
Another tip is to make the soup more liquid using your bone broth so, for one serving, you will be able to eat much more.
The carb count is then very minimal.

Keto tomato soup calories and nutrition

With 83 calories per serving, one serving also contains 6 grams carbohydrates and 2 grams of fiber. This comes to a total of 4 net carbs, perfect for both keto diet and low carb diet.

It is still pretty great, considering you can eat your favorite tasty soup and stay entirely in keto.

How to make tomato soup low carb or keto?

As already mentioned above, use more bone broth to liquidize the soup.

If you want to add sugar, only add sugar substitutes allowed. Especially the ones which do not have any carbs.

I have not sweetened this perfect keto soup with anything.

This recipe calls for beefsteak tomatoes, and they are sweet enough on their own. If not, you can still use a few stevia tabs or drops.

I add stevia to almost everything I cook. Well, not everything, only the keto recipes need to be sweeter. Baking is another story.

serving fresh beefsteak tomato soup
Low carb tomato soup

Keto tomato soup calories and nutrition

With 83 calories per serving, one serving also contains 6 grams carbohydrates and 2 grams of fiber. This comes to a total of 4 net carbs, perfect for both keto diet and low carb diet.

It is still pretty great, considering you can eat your favorite tasty soup and stay entirely in keto.

How to make tomato soup low carb or keto?

As already mentioned above, use more bone broth to liquidize the soup.

If you want to add sugar, only add sugar substitutes allowed. Especially the ones which do not have any carbs.

I have not sweetened this perfect keto soup with anything.

This recipe calls for beefsteak tomatoes, and they are sweet enough on their own. If not, you can still use a few stevia tabs or drops.

I add stevia to almost everything I cook. Well, not everything, only the keto recipes need to be sweeter. Baking is another story.

Can I add heavy cream to a low carb soup?

You can add heavy cream to the soup to make it even more creamy. I would suggest doing this step only toward the end.

How do you puree roasted tomatoes for tomato soup?

There are a few options you can puree tomatoes for yummy creamy keto tomato soup:

  1. Using a hand immersion blender, as I have used in our recipe
  2. You can add it all into a food processor and mix it all
  3. Using Vitamix will give the creamiest soup of all
  4. If you do not have any of those, Magic Bullet will also do the job.

What can you garnish low carb tomato soup with?

There are so many options you can use to garnish your keto tomato soup

  • Add our crispy garlic keto croutons on top
  • Garnish the soup with slices or squares of avocados
  • Add basil pesto on top of the soup
  • Sprinkle it with red pepper flakes for a little spicy twist
  • Pour a bit of avocado oil on top
  • Use herbs like oregano or rosemary, which are a perfect fit for this Italian flavor soup
  • Sprinkle the soup with pieces of baked bacon
  • Use our keto cheese pops on top
  • Grilled Cheese
  • Top it up with a bit of pork lard scratchings for an additional flavor
  • Serve alongside cheesy bread bites
Low Carb tomato soup together with keto Croutons
Roasted tomato soup

Best keto tomato soup recipe

Our tomato soup is easy, and once you eat this soup, you will for sure agree with me. The significant part is that it is ketogenic as well, and you see how an easy meal like this can be added to a keto part into it.

Tools to make low carb tomato soup

  • Baking sheet – use a regular size baking sheet for you to be able to spread all of the veggies in one layer
  • Parchment paper – the best option to make your roasting cleaner friendly
  • Hand immersion blender – mix the tomatoes and vegetables into a creamy tomato soup is a must
  • Medium size soup pot – you would need that for combining all of the vegetables

Ingredients to use for homemade tomato soup from scratch.

  • Beefsteak tomatoes
  • Garlic
  • Onion
  • Fresh thyme
  • Fresh basil
  • Olive oil
  • Bone broth
  • Salt & pepper

*Exact measurements are listed in the recipe card below.

Step by Step Instructions for making the best fresh creamy keto tomato soup

First step: Prepare ingredients

Prepare all of the ingredients. Try to use as many as you can, homegrown or in good quality.

Bone broth can be exchanged with chicken broth or any other stock.

Low carb tomato soup ingredients needed.
Keto tomato soup

Second step: Spread

Prepare your baking sheet and line it with parchment paper. Spread your beefsteak tomatoes cut into thicker slices. Add garlic cut into halves, and onion cut into squares. I have also added a few cherry tomatoes.

On top of the vegetables, add fresh thyme and sprinkle it with a bit of salt and pepper.

baking vegetables for keto soup
Spreading vegetables on a baking sheet

Third step: Oil

Sprinkle all with extra virgin olive oil. If you have avocado oil or any Italian-flavored oil, that will go perfectly together. Add a few drops of those as well. If I make this soup only for my husband and me, I always add chili oil to it. That gives the soup a great spicy twist.

sprinkling oil on top of beefsteak tomatoes for keto soup
Sprinkling olive oil

Fourth step: Bake

Place all into the oven and bake at 200 Celsius or 400 Fahrenheit for 40 minutes. You will be surprised by the beautiful smell of the kitchen while baking. It is so good that you are ready to just take it all out of the oven and eat all of the veggies as they are. But no. Wait. Patience is a virtue.

baked vegetables for a low Carb Basil Soup
Baking the vegetables

Fifth step: Clean the stems

After all of the baking is done, clean all of the stems. Especially the baby tomatoes end and stems from thyme, which is pretty hard after baking. You want to have your tomato soup without those.

cleaning stems from herbs for a keto soup
Cleaning after roasting

Sixth step: Add fresh basil

Once you have it all done, place all of the baked tomatoes and vegetables together with thyme into a medium size soup pot.

Tomato and basil go hand in hand. So there is no way we will be ignoring that.

Add your fresh basil leaves. Fresh basil leaves give the soup an unbelievable twist, and your delicious soup will become even better than you can imagine.

fresh basil on top of Low Carb Tomato Soup
Adding fresh basil leaves

Seventh step: Bone broth

Adding freshly made bone or chicken broth will enhance the flavor of your homemade fresh-from-the-garden tomato and garlic soup. As mentioned above, the less bone broth you add, the thicker the soup will be. But on the other side, more carbohydrates it will have for you to consider. I usually add 2 cups of fresh bone broth we make weekly in our Instant Pot.

Adding Bone Broth to Roasted tomato basil soup
adding broth

Eighth step: Mix

Use an immersion blender to mix all of it into a perfectly creamy tomato soup with fresh tomatoes. In about a minute, you will be done and ready to serve. I hope you will love this soup as much as we love it.

mixing low carb tomato soup with hand blender
Blending the soup

Tips and Tricks

  • Tomatoes – try to use homegrown or good quality.
  • Broth – could be used chicken, bone, or any other stock.
  • Olive oil – can be exchanged with avocado oil or Italian-flavored olive oil

FREQUENTLY ASKED QUESTIONS AND ANSWERS

Can you make an easy keto roasted tomato soup recipe in an Instant Pot?

Because this is a low carb roasted tomato soup, it will be pretty challenging to bake it inside the Instant Pot. You can quickly saute all the vegetables on a saute function, add bone broth, and cook it all. But I still doubt this will be as flavorful as if you bake it inside the oven.

You can make regular easy tomato soup there. It just won’t be roasted. Still, a good choice if you prefer your Instant Pot.

Can I use canned tomatoes?

If you do not have enough fresh tomatoes, you can use canned tomatoes or tomato paste as an addition.

party serving Gazpacho looking tomato basil soup
Keto gazpacho

Can I use canned tomato soup?

There is of course, Campbell’s tomato soup and other canned soup brands to use. But tell me. Why would you use canned Campbell’s soup when you can make your own using fresh ingredients? I know it might be more convenient, but you can also double the recipe and preserve it yourself for the future. You will have a great soup keto style always in your pantry.

Can you use the roasted tomato soup for caning?

For sure, you can. That is exactly what my mum does every single year. That way, you will have your soup ready throughout the whole year. You have to warm it up, and your dinner is served.

warming up with bowl of keto tomato soup
Low carb tomato soup

Can you make gazpacho out of roasted tomato basil soup?

Gazpacho is a cold soup where fresh raw tomatoes are used. So, in general, you can not call this soup a gazpacho once it cools down.

I have made this recipe with extra cheese and tomato. We served our cold creamy low carb tomato soup and grilled cheese in tiny glasses for our party and added a few keto croutons. I have to tell you. It was superb and the best soup. Everyone was asking for more. As you can see in one of the pictures I took, it also looked great and was easy to eat. So do it. Why not.

Why is my tomato soup not red?

There is various reason your soup will not turn fully dark red.

Your tomatoes are the ones that play a significant role. Some of them are not always intense red color, although by roasting them, the color intensifies, it might still not be enough red for your liking.

Adding onions and garlic will make the soup further much lighter.

Therefore I always prefer to add purple onions to our tomato soup. They will add not only a perfect flavor but color as well.

But in the end, it does not matter what type of red color your soup looks. It still is red, sometimes it might be a bit orange. But it tasted unbelievable. And that it is all that matters.

How to make creamy tomato soup?

You can make your low carb tomato soup even creamier by adding either sour cream or whipped cream to it. I do that from time to time, and it makes the soup that extra tad creamier.

adding keto Croutons to tomato basil soup
Keto Tomato soup

How can you thicken tomato basil soup?

If you feel your keto soup is too liquidy, either because you have added too much bone broth or because you prefer it a bit thicker, there are some solutions as well.

  1. Avocados – using soft avocados mixed into a soup will immediately thicken it and make it even more flavorful.
  2. Less Broth – Next time, add a less bone broth to make it thicker if you do prefer
  3. Cauliflower – You can also thicken your soup by adding baked cauliflower into the soup.
  4. Xanthan gum or gelatin – those will do the same job for thickening. Just be extra careful with Xanthan. You need a tiny little amount of it. Otherwise, your soup will turn into a giant spooky slime.

What to serve with keto tomato soup?

As a kid, bread was a must. So my suggestion is to make our keto farmer’s bread and serve it together with it. You can also make a grilled cheese sandwich bread from it and serve it.

A perfect addition to our bread collection is those lovely keto Italian breadsticks you can use for breakfast, dinner, with your soup, or as a snack during the day.

Pick any keto bread from our selection, and all will go perfectly.

Be it keto wraps or greek yogurt buns. All are good to go.

How to store low carb tomato soup?

Once your soup is done, you can store this soup in the fridge for up to 4-5 days.

Can you freeze keto roasted tomato basil soup?

Freezing is what I do most of the time. Just fill up your Mason Jars and keep them inside the freezer for whenever you need a quick dinner with no time on hand to cook a full meal.

I hope those questions and tips did help a bit and you are ready to start cooking.

Other keto soup recipes

Pin the image bellow for later

Roasted tomato soup

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

Follow us on Pinterest, Instagram, or YouTube.

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

Full Recipe card with print out option

Thanks for giving us 5 stars

Yield: 6

Roasted Creamy Keto Tomato Soup Recipe

holding a bowl of tomato soup.

Our Roasted Creamy Keto Tomato Soup Recipe with Basil and Fresh Beefsteak Tomatoes straight from your Garden will warm you up every time throughout the whole Winter. Quick and Easy to make, this Low Carb Tomato Soup Recipe is not only Grain-Free and Gluten-Free but extremely Tasty and Healthy.

Prep Time 5 minutes
Cook Time 40 minutes
Total Time 45 minutes

Ingredients

  • 3 Beefsteak tomatoes (500 grams)
  • 3 Baby garlic cloves
  • 1 Medium purple onion
  • Thyme
  • Olive oil
  • 1/2 cup of fresh basil
  • Salt/Pepper
  • 2 cups Bone Broth

Instructions

    1. Prepare all of the ingredients. Try to use as many as you can, homegrown or in good quality.
    2. Prepare your baking sheet and line it with parchment paper. Spread your beefsteak tomatoes cut into thicker slices. Add garlic cut into halves, and onion cut into squares. I have also added a few cherry tomatoes. On top of the vegetables, add fresh thyme and sprinkle it with a bit of salt and pepper.
    3. Sprinkle all with extra virgin olive oil. If you have avocado oil or any Italian-flavored oil, that will go perfectly together.
    4. Place all into the oven and bake at 200 Celsius or 400 Fahrenheit for 40 minutes. You will be surprised by the beautiful smell of the kitchen while baking.
    5. After all of the baking is done, clean all of the stems. Especially the baby tomatoes end and stems from thyme, which is pretty hard after baking. You want to have your tomato soup without those.
    6. Once you have it all done, place all of the baked tomatoes and vegetables together with thyme into a medium size soup pot. Tomato and basil go hand in hand. So there is no way we will be ignoring that.
    7. Adding freshly made bone or chicken broth will enhance the flavor of your homemade fresh-from-the-garden tomato and garlic soup. As mentioned above, the less bone broth you add, the thicker the soup will be. But on the other side, more carbohydrates it will have for you to consider. I usually add 2 cups of fresh bone broth we make weekly in our Instant Pot.
    8. Use an immersion blender to mix all of it into a perfectly creamy tomato soup with fresh tomatoes. In about a minute, you will be done and ready to serve. I hope you will love this soup as much as we love it.

Notes

  • While adding Extra Virgin olive oil, enhance the flavor a bit more with either avocado oil or chilli oil
  • For darker color, use purple onions instead of the regular ones
  • When deciding to thicken the soup with Xanthan, be very carefull. Add just a tiny bit. Otherwise your soup will turn into a monster slime.

Recommended Products

As an Amazon Associate and member of other affiliate programs, I earn from qualifying purchases.

Nutrition Information

Yield

6

Serving Size

1

Amount Per Serving Calories 61Total Fat 3gSaturated Fat 0gTrans Fat 0gUnsaturated Fat 2gCholesterol 1mgCarbohydrates 6gFiber 1gSugar 3gProtein 4g

Did you make this recipe?

Mention @lowcarb_nocarb or tag #lowcarb_nocarb on Instagram or our Facebook Support Group.

First Published: October 11, 2019
Last Updated: October 11, 2022

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

As a great company, Lakanto is offering to all of our readers 15% of ALL of their Products using a Coupon Code: lowcarbnocarb.

Keto Soup Recipes

Low Carb and Keto Soup recipes to choose from

image with 10 sheets for keto meal plan
7 Day Keto Meal Plan

Valerie Cameron

Wednesday 7th of September 2022

This recipe really interests me and I'll get the beefsteak tomatoes from the garden shortly. This is the only way I make most soups and this one is blessed with some really great pictures. Nothing left to the imagination. You've covered it all.

Thank you very much!

Zuzana

Wednesday 7th of September 2022

I am so happy you found me. You are going to love this soup as much as I do. Promise. Love Beefsteak tomatoes as well.

How To Make Everything Bagel Seasoning - Low Carb No Carb

Wednesday 20th of April 2022

[…] Tomato Soup […]

Savory Keto Broccoli Cheese Muffins Recipe - My PCOS Kitchen

Tuesday 28th of September 2021

[…] Roasted Tomato Basil Soup […]

Low Carb Roasted Tomato Basil Soup - StuffMartUSA

Monday 20th of September 2021

[…] Click To Read More […]

Keto Cloud Egg Crisps Chips - Low Carb No Carb

Thursday 4th of March 2021

[…] a beautiful Canapes with those Keto CrispsCut into smaller pieces, they are perfect toppings for Low Carb Tomato SoupPlace this Keto Avocado Egg Salad on the top and you have a perfectly tailored […]

Skip to Recipe