Keto Green Bean Casserole

by Clean Keto Lifestyle

Our Keto Green Bean Casserole is made from scratch but oh so simple to make! It's fresh, creamy and offers a crispy crunch from the fried onion topping. This will be a crowd fave to serve at Thanksgiving.  It is keto, low-carb, grain-free, and gluten-free!

Keto Green Bean Casserole

Classic Keto Green Bean Casserole

Our Keto Green Bean Casserole is an instant classic.   Not only is it simple to make – but it is also so darn good.

Tender green beans tossed in a delicious creamy mushroom sauce and then topped with crispy onions – what's not to love?

Keto Green Bean Casserole

The Perfect Holiday Side Dish

Green Bean Casserole is a classic holiday side dish. It is a staple at all of our holiday gatherings – Thanksgiving, Christmas, and Easter to name a few.

This is the perfect side dish to serve to along side your Thanksgiving Turkey, Christmas Prime Rib, and Easter Ham.

Double or triple this recipe if you are feeding a large group.

Keto Green Bean Casserole

Featured Recipe Video

Check out this video to see how to make our most popular recipe – Keto Zucchini Bread Whoopie Pies.

They are easy to make and so delicious!

Upgrading the Store-Bought Version

You've probably had the standard store-bought version of green been casserole.  You know the one with a can of green beans mixed with Campbell's Cream of Mushroom Soup and then topped with French's Fried Onions. 

While this version is definitely the most popular – it's not very keto-friendly and is also full of artificial ingredients.

So this recipe is an upgraded version! Let's break down the details:

  • Green Beans: We are using fresh green beans instead of the soggy canned version. Opt for organic green beans if you can find them in your grocery store to get the most nutrient content.
  • Mushroom Soup: We are making our own Cream of Mushroom Soup with baby portobella mushrooms, garlic, grass-fed butter, bone broth, and coconut flour, mixed with some heavy cream and cream cheese.
  • Crispy Onions: French's Fried Onions are made from “Onions, Palm Oil, Wheat Flour, Salt And Dextrose”. To make this dish grain-free and gluten-free, we are using almond flour for our breading. Plus, we are frying up our onions in our favorite healthy fatcoconut oil!

The end result is a Keto Green Bean Casserole that you can feel good about serving to your family and friends.

Keto Green Bean Casserole 1

How To Make Keto Green Bean Casserole

There are 3 primary steps when it comes to making this dish.

  1. Make the Crispy Onions
  2. Boil the Green Beans
  3. Make the Cream of Mushroom Soup

Then you just throw everything together in a baking dish and cook until it is warm and bubbly.

Let's review each step in detail.

Keto Green Bean Casserole

Make the Crispy Onions

First, thinly slice your onions.

In a baking dish, mix the heavy cream and apple cider vinegar – this mixture mimics the flavor of buttermilk. Add the onion slices to the dish and soak for 1 hour.

Sliced Onions

After an hour, heat about 1/2 inch of coconut oil in a large skillet to 375°F.

Mix the almond flour with Season All in a bowl.   

Dredge the soaked onion slices in the flour mixture, then put them directly in the oil to fry.

Use a wooden spoon to separate the slices.

Once golden browned, remove the fried onions and place them on paper towel lined plate. They will crisp up as they cool. 

PRO TIP: Try to fry the whole onion in one batch in your largest skillet. The almond flour that falls off into the oil will turn too brown and subsequent batches will not be as good as the first.

Keto Fried Onions

Boil the Green Beans

Trim the ends of the green beans. 

Cook the green beans in boiling water for about 5 minutes. Drain the green beans and set aside.

Keto Green Beans

Make the Cream of Mushroom Soup

Heat the avocado oil on medium heat in an oven-proof cast iron skillet.

Add the chopped mushrooms and garlic. Cook for about 10 minutes or until the mushrooms soften.

Slowly, add the chicken bone broth stirring as you go. Then add in the heavy cream, cream cheese, and seasoning and stir until the cheeses are melted.

Keto Green Bean Casserole Sauteed Onions

Assemble the Keto Green Bean Casserole

Add the boiled green beans to the skillet, and stir to fully combine with the mushroom mixture. 

Top the casserole with the fried onions.

Carefully, cover the skillet with foil and transfer to the oven.

Bake covered for 20 minutes at 350°F.

Pro Tip: If you don’t have a cast iron skillet that can go in the oven, transfer your mixture to a casserole dish, top with onions, cover with foil, and bake.

Keto Green Bean Casserole

Make Keto Green Bean Casserole Ahead of Time

You can make the green beans and cream of mushroom soup up to 2 days ahead of time.  Store them in separate sealed containers in the fridge.

We recommend making the fried onions the day of so they don't get soggy. 

Keto Green Bean Casserole

More Holiday Dinner Side Dishes You’ll Love

Keto Green Bean Casserole


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