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Keto Green Bean Casserole

The holidays are all about tasty side dishes, at least for me, and it wouldn’t be the same without green bean casserole! If you’re like me, this from-scratch keto green bean casserole is an easy homemade recipe anyone can enjoy. 

Keto green bean casserole in a baking dish.

What is Green Bean Casserole?

The American side dish served at Christmas, Thanksgiving, and Easter holidays was developed by Campbell’s test kitchen in the sixties. To this day, families celebrate with canned green beans, canned cream of mushroom soup, and packaged French fried onions (so addicting).

Ingredients You’ll Need

  • Cream of Mushroom: Use store-bought cream of mushroom or prepare this gluten-free and keto cream of mushroom soup.
  • Olive Oil: Saute the onions in oil over low heat until they become golden brown and crispy.
  • Onion: For this once-in-a-while dish, I don’t mind adding onions. However, I recognize onions are higher in carbs. If you’re worried about that, use crumbled pork rinds or parmesan crisps.
  • Green Beans: Fresh green beans produce the best results.

Additions and Substitutions

  • Finish the keto green bean casserole with crushed almonds, shredded cheese, parmesan crisps, or ground pork rinds instead of fried onions.
  • Include mix-ins like crispy bacon or cream cheese.

How to Make Keto Green Bean Casserole

The full recipe with measurements is in the recipe card below.

Step 1: Prepare keto cream of mushroom soup in a saute pan.

Keto cream of mushroom soup in a bowl topped with fresh parsley.

Step 2: Warm oil in a skillet; add the onions and continue cooking until they become brown and crispy, for about 20 minutes.

Onions frying in a small skillet.

Step 3: Remove the onions using a slotted spoon and set them out to dry on paper towels.

Golden brown onions in a small skillet.

Step 4: Preheat the oven to 350° F (176°C) and add green beans to the bottom of a baking dish. Top them with the cream of mushroom soup mixture and finish with the crispy onions.

Green beans in a baking dish covered with cream of mushroom soup.

Step 5: Cover and bake for 30 minutes.

Keto green bean casserole baking in the oven.
Keto green bean casserole in a baking dish.

Serving Suggestions

What to do with the Leftovers

  • Refrigerate  Store leftovers in an airtight container for 3-4 days.
  • Freeze  I don’t recommend freezing the casserole. Keto green bean casserole tends to come out watery, and the onions lose their crunch.
  • Reheat  Warm the leftovers in the oven to maintain the crispiness of the onion.

Frequently Asked Questions

Are traditional green bean casseroles keto?

Most traditional recipes use canned cream of mushroom soup. The store-bought cans contain flour and cornstarch, and they can increase the number of carbs in the dish. Additionally, canned green beans are higher in carbs than fresh green beans.

Are green beans keto-friendly?

Green beans are great for a ketogenic lifestyle as they contain 4 grams of net carbohydrates per serving (100 grams).

Can green bean casserole be made ahead?

Yes, you can. Holiday meals can be busy, so you can easily make this casserole ahead of time. If you’re prepping the meal ahead of time, I recommend storing the casserole and crispy fried onions separately. Leave the onions in an airtight container on the counter and cover and refrigerate the green bean and mushroom mixture for up to 2 days. When you’re ready to eat, remove the casserole dish from the fridge and leave it at room temperature for at least 30 minutes. Preheat the oven and bake as directed.

Does green bean casserole have a lot of carbs?

You can control the ingredients you add to homemade green bean casserole, and by using fresh green beans and homemade cream of mushroom soup rather than the canned soup version, it significantly reduces the amount of carbohydrates. One cup of my keto green bean casserole has three net carbs.

Is this recipe gluten-free?

Our keto green bean casserole is also gluten-free.

More Fall Recipes:

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Keto green bean casserole in a baking dish.

Keto Green Bean Casserole

Tressa Jamil
While canned recipes come together quickly, you can't beat the taste of our from-scratch keto green bean casserole made with fresh and wholesome ingredients.
5 from 5 votes
Prep Time 20 minutes
Cook Time 40 minutes
Total Time 1 hour
Course Side Dish
Cuisine American
Servings 8 Servings
Calories 236 kcal
Ingredients
  
For the Cream of Mushroom Soup:
  • 4 tablespoons butter
  • 1 white onion,  diced
  • 4 garlic cloves,  minced
  • 1½   pounds mushrooms,  sliced
  • 4 teaspoons dried thyme
  • 1 teaspoon kosher salt
  • 1 teaspoon black pepper,  coarse ground
  • ½ teaspoon xanthan gum
  • cups   beef broth
  • 2 tablespoons sherry wine
  • 1 cup  heavy cream
For the Casserole:
  • 1 tablespoon olive oil
  • 2 yellow onions, thinly sliced
  • 1 pound green beans, ends removed, and cut in half
Instructions
 
  • While the soup is cooking, warm oil in a large skillet over low-medium heat; add the onions and continue cooking until they become brown and crispy, for about 20 minutes. Remove the onions using a slotted spoon and set them out to dry on paper towels.
  • Preheat the oven to 350° F (176°C) and add green beans to the bottom of a baking dish. Top them with the cream of mushroom soup mixture and finish with the crispy onions.
  • Cover and bake for 30 minutes.
Notes
Nutrition Disclosure:
  • The nutritional information shown is an estimate provided by an online nutrition calculator. It should not be considered a substitute for professional advice.
Nutrition
Serving: 1 Serving | Calories: 236 kcal | Carbohydrates: 13 g | Protein: 7 g | Fat: 19 g | Saturated Fat: 11 g | Polyunsaturated Fat: 1 g | Monounsaturated Fat: 6 g | Cholesterol: 49 mg | Sodium: 834 mg | Potassium: 566 mg | Fiber: 4 g | Sugar: 6 g | Vitamin A: 1025 IU | Vitamin C: 13 mg | Calcium: 76 mg | Iron: 2 mg
Did you make this recipe? Let me know how it turned out for you! Leave a comment below and follow @thejamilghar or tag #thejamilghar on Instagram!
4.80 from 5 votes (4 ratings without comment)
Recipe Rating




Laura

Monday 13th of February 2023

I made this Keto Green Bean Casserole for our family dinner and it was a hit! The creamy and rich flavor of the homemade casserole was so much better than the canned version. And it was great to be able to serve a keto-friendly dish during the holidays. Thank you for sharing this recipe!