Looking for a comforting side dish that’s both flavorful and keto-friendly? This easy Keto Green Bean Casserole is here to impress. It’s a low-carb twist on a classic favorite, made with tender green beans and the earthy goodness of mushrooms, topped with crispy fried onions. If it’s a weekday dinner or a holiday feast, this low carb green bean casserole fits perfectly on your table.
Serve it alongside your Thanksgiving turkey, or a festive roast, or pair it with cranberry sauce on the side. This dish proves that eating low-carb doesn’t mean giving up on flavor or tradition. Try it out, and watch it become a favorite in your home.
Why I Love This Recipe
I love this Keto Green Bean Casserole because it’s a perfect balance of healthy and delicious, letting me enjoy the classic flavors of a traditional dish without the carbs. It’s a hit with kids, too—the crispy fried onions and creamy texture make green beans irresistible even for picky eaters. And the best part? It’s ideal for holidays like Thanksgiving, yet simple enough to whip up for any small gathering or family dinner.
Easy Keto Side Dishes
We have other side dishes to complete your simple celebrations, Holidays, and family occasions.
These delicious cauliflower rice recipes include cheesy mashed cauliflower and coconut cauliflower rice. If you like veggie sides so much, I am sure you will love our Korean pickled radish varieties like white pickled radish, red pickled radish, or purple pickled radish infused with a blueberry flavor.
Our breaded cauliflower, paprika zucchini chips, and roasted Brussels sprout skewers are also the perfect sides for parties, plus you can have them as snacks.
Using Fresh Green Beans Vs. Frozen Green Beans
Deciding between fresh and frozen green beans comes down to your preference and how much time you have. I think fresh green beans have a better flavor and slightly firmer texture, but when you’re short on time, frozen ones are a fantastic option—they’re convenient and still taste great. Whether fresh or frozen, your keto green bean casserole will be as satisfying and flavorful.
Cream of Mushroom Soup and Keto Fried Onions
Instead of relying on canned soup or store-bought fried onions, I love making my versions. Recently, I whipped up some French fried onions as a healthier twist on fast-food onion rings, and they were so good that I couldn’t resist using them for this casserole.
The same goes for the creamy mushroom soup I made earlier in the week. My daughter requested it, and there happened to be leftovers. Rather than reheating it independently, I paired it with green beans to create a new dish. The result? A casserole bursting with rich flavors and homemade goodness that I didn’t expect to love this much.
How To Make Keto Green Bean Casserole Recipe
I enjoyed the recipe because it is easy to make and surprisingly good for a 3-ingredient casserole recipe. My version of green bean casserole is so flavorful and creamy without even a need for cream cheese or heavy cream.
Follow the recipe with these step-by-step instructions I prepared for you. You can check the recipe card below for the full recipe.
Kitchen Gadgets Needed:
- Casserole Dish: You will need a casserole dish for baking, but you can use any baking dish if you do not have one.
- Mixing Bowl: Use a mixing bowl to make the green bean mixture.
- Rubber Spatula: Any spatula you have at home is okay since you will only use this for mixing the mushroom soup and fresh green beans.
Green Bean Casserole Ingredients:
- Green Beans: Look for fresh green beans with a vibrant color.
- Cream of Mushroom Soup: Instead of fresh mushrooms, use a portion of your cream of mushroom soup to make it more easy and flavorful.
- Fried Onions: Crispy French fried onions are essential for this recipe because they go at the top of the casserole and give it an excellent finish.
*Exact measurements are listed in the recipe card below.
STEP-BY-STEP INSTRUCTIONS FOR LOW CARB GREEN BEAN CASSEROLE
First Step: Prepare Ingredients
Prepare all the ingredients and start preheating your oven to 375 F (190 C).
Second Step: Blanch the Green Beans
Trim the ends off the green beans and blanch them in boiling water in a large skillet for at least 3-4 minutes. Drain them and transfer them into a bowl.
Third Step: Green Bean Mixture
In a bowl, pour the cream of mushroom soup into the blanched green beans and mix until the green beans are all covered with the mushroom sauce.
Fourth Step: Transfer and Add Toppings
After mixing the green beans and mushroom soup, transfer them to your casserole. Optionally, you can add more mushroom soup or sauce to make it more flavorful.
Once assembled in the casserole, sprinkle the fried onions on top.
Fifth Step: Bake
Bake at 400 Fahrenheit (200 Celsius) for 10 minutes until the top of the casserole brown and gets crunchy.
TIPS AND TRICKS TO MAKE THIS RECIPE:
- Blanching – This process is important for this recipe because it makes the green beans stand out more and gives them a vibrant green color. Just make sure not to overcook the green beans in this process.
- Topping – You can experiment by adding toppings like grated cheese, parmesan cheese, cheddar cheese, or mozzarella cheese. Crushed pork rinds are also a perfect topping.
- Fresh green beans – As much as possible, use fresh green beans instead of frozen green beans or canned green beans, as the fresh ones give better flavor and overall results.
FREQUENTLY ASKED QUESTIONS AND ANSWERS
Yes, you can. If you do not have any oven-proof casserole dish available in your kitchen or still haven’t invested in one, you can use any baking dish there since the goal is to achieve the perfect easy low-carb green bean recipe.
What To Serve With This Low Carb Keto Casserole?
Some popular ways to serve this low carb keto green bean casserole include pairing it with mashed cauliflower and frozen cauliflower rice. At parties and holidays, serve it with other sides like broccoli salad and potato salad so everyone can enjoy it.
How Do I Store The Best Keto Green Bean Casserole?
Got leftovers? No problem. Here’s how you can keep your green bean casserole fresh and ready for another meal:
- In the fridge: Move it to an airtight container to keep the flavors and texture right. It’ll stay suitable for a few days.
- In the freezer: Divide it into portions so you only thaw and reheat what you need. Use freezer-safe containers or resealable bags to prevent freezer burn.
- Reheating: Warm it in the oven at 350°F (175°C). Pop it into an oven-safe dish and bake for 20–25 minutes until hot and bubbling.
More Keto Friendly Recipes To Keep It Low Carb
If you are interested in similar recipes like this side dish casserole, I am sure you will also like this taco casserole recipe loaded with savory taco meat and low-carb vegetables.
You can also try some of our original recipes and vegetable dishes, like the stuffed pepper recipe and cheesy zucchini casserole, which can also be your new favorite since you can serve them as a side dish and main dish.
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Keto Green Bean Casserole Recipe
Equipment
- 1 Spatula
Ingredients
- 4 Cups Green Beans
- 2 Cups Cream of Mushroom Soup
- 3 Cups Fried Onions
Instructions
- Prepare all the ingredients and start preheating your oven to 375 F (190 C).
- Trim the ends off the green beans and blanch them in boiling water in a large skillet for at least 3-4 minutes. Drain them and transfer them into a bowl.
- In a bowl, pour the cream of mushroom soup into the blanched green beans and mix until the green beans are all covered with the mushroom sauce.
- After mixing the green beans and mushroom soup, transfer them to your casserole. Optionally, you can add more mushroom soup or sauce to make it more flavorful. Once assembled in the casserole, sprinkle the fried onions on top.
- Bake at 400 Fahrenheit (200 Celsius) for 10 minutes until the top of the casserole brown and gets crunchy.
Video
Notes
- Blanching – This process is important for this recipe because it makes the green beans stand out more and gives them a vibrant green color. Just make sure not to overcook the green beans in this process.
- Topping – You can experiment by adding toppings like grated cheese, parmesan cheese, cheddar cheese, or mozzarella cheese. Crushed pork rinds are also a perfect topping.
- Fresh green beans – As much as possible, use fresh green beans instead of frozen green beans or canned green beans, as the fresh ones give better flavor and overall results.
Nutrition
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.
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Perfect Drinks For You
With any casserole, a great drink to go with is a must. Pick your favorite and enjoy.
