This keto-friendly green bean casserole is the perfect keto side dish to add to your meal this Thanksgiving, Christmas, or any other holiday meal. I bet you won’t have any leftovers!
It’s a low-carb green bean casserole dish made with fresh green beans, caramelized onions, and lots of provolone cheese. It’s low in carbs, gluten-free, easy to make, and flat-out delicious!
What more can you ask for in a keto side dish?
Oh, and did I mention there’s no goopy, canned mushroom soup like commonly found in traditional green bean casserole recipes?
Instead, it features a simple, creamy sauce with a dash of nutmeg that lets the green beans and caramelized onions shine.
I promise it’s a low-carb recipe that you will be proud to serve your whole family during the holiday season and family gatherings.
If you’re on the hunt for more holiday favorites turned keto-friendly then you’ll love our collection of Keto Thanksgiving Sides and our Keto Christmas Sides.
Keto Green Bean Casserole
If you’ve ever had a classic green bean casserole with the cream of mushroom soup and crispy onions, this isn’t that.
When creating this low-carb green bean casserole, I wanted a green bean recipe that was a little more “elevated” and worthy of the holiday table.
I took inspiration from an old favorite recipe of mine from Food Wishes which was a French onion soup green bean casserole with, of course, the star being the caramelized onions.
I decided to pair the flavorful onions with provolone cheese and a keto-friendly cream sauce, which is super simple to make!
Even though I use provolone cheese, any white cheese you like will work well!
The result of the onions, creamy sauce, cheese, and green beans layered in a casserole dish and baked until bubbly is pure perfection!
If you bring this casserole dish to any potluck, you’ll be asked to bring it every time!
Wholesome Ingredients For Low-Carb Green Bean Casserole
The following are the ingredients needed to make a low-carb green bean casserole. Note that the full printable recipe card is at the bottom of the post.
- Onions
- Butter
- Fresh Green Beans
- Provolone, shredded
- Heavy Whipping Cream
- Grated Parmesan Cheese
- Nutmeg
- Cayenne Pepper Powder
How To Make A Gluten-Free Green Bean Casserole
My favorite part about this low-carb green bean casserole (besides eating it!) is its simplicity! Just a few components come together to make this perfect holiday side dish.
First, you’ll cook the onions down until they are caramelized, and then put them aside. Next, you’ll want to make the keto cream sauce.
If you’re a good multitasker, you can make the sauce while the onions are caramelizing. Just make sure you keep a close eye on your onions so they don’t burn.
The gluten-free creamy sauce is as simple as bringing the unsalted butter and heavy cream to a simmer, adding some parmesan cheese and spices, and cooking until the sauce is reduced by one-third.
Then, blanch the green beans by adding them to a pot of boiling water for four minutes. You’ll know they’re ready when the green beans become vibrant green.
Once the green beans are blanched, you’ll strain them and toss them in salt and pepper. Add them to the bottom of your baking dish.
Pour the keto cream sauce and spread the cooked sliced onions on top evenly. Add on top of the green beans the shredded provolone cheese, and it’s ready to bake!
When the cheese is browned and bubbly, around 20 to 25 minutes, your casserole is ready to be served and enjoyed!
Store any leftovers in an airtight container for up to three days. I do not recommend you freeze the casserole, as the sauce will separate once it is thawed.
Make Ahead Instructions
This delicious green bean casserole can be prepared up to two days ahead.
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To do so, you will make the casserole, allow it to cool at room temperature, and then wrap it in plastic wrap and aluminum foil before storing it in the refrigerator.
Once ready to bake, remove the covering and bake for an additional ten minutes.
When it comes to the green beans for the casserole, I highly recommend using fresh green beans instead of frozen ones or canned green beans.
In fact, the green beans for this casserole came from my garden, and I urge you to try to grow your own as well. They’re fast and easy to grow and taste amazing!
Green beans can fit easily into your low-carb lifestyle, and in this keto green bean casserole recipe, a serving has only 4.3 g net carbs!
Making it the best way to enjoy a traditional recipe without the worry of being kicked out of ketosis.
The following are some of our favorite keto traditional holiday sides:
Oh, and if you are looking for a creative way to enjoy all those sides, why not try some of our holiday dinners like our Keto Cuban Mojo Turkey, keto spicy ham, or our keto brown sugar mustard glazed ham.
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Keto Green Bean Casserole (Gluten-Free)
This keto green bean casserole is made with fresh green beans, caramelized onions, and lots of provolone cheese. It's low in carbs, easy to make, and insanely delicious!
Ingredients
- 3 large onions, sliced
- 2 tablespoons unsalted butter
- 1/4 teaspoon salt
- 2 lbs fresh green beans
- 1/2 teaspoon salt
- 1/4 teaspoon pepper
- 8 oz provolone cheese, shredded
Keto Cream Sauce
- 4 tablespoons of butter
- 2 cups heavy cream
- 1/2 cup grated parmesan cheese
- 1/2 teaspoon of salt
- 1/4 teaspoon nutmeg
- 1/8 teaspoon cayenne pepper powder
- 1/2 teaspoon of garlic powder
Instructions
- In a medium-sized pan, add 2 tablespoons of butter and sliced onions. Cook on medium-low for about 15 minutes, stirring occasionally, until the onions cook down and are caramelized.
- Next, you'll want to make the keto cream sauce by adding the 4 tablespoons of butter and heavy cream to a saucepan on medium heat and bringing it to a simmer.
- Then, add the parmesan cheese, nutmeg, garlic powder, cayenne pepper powder, salt, and black pepper and cook until the sauce is reduced by one-third. Stirring occasionally to make sure your sauce doesn't burn.
- Preheat the oven to 350 degrees.
- Next, you'll blanch the green beans. Bring a large pot of water to boil; once boiling, add the fresh green beans and cook for 4 minutes. You'll know they're ready when the green beans become vibrant green.
- Once the green beans are blanched, strain them and toss them in salt and pepper.
- To assemble the casserole: add the blanched green beans to the bottom of your baking dish and pour the keto cream sauce over them. Then, spread the caramelized onions on top evenly and top with the shredded provolone cheese.
- Bake for 20 - 30 minutes until the cheese is browned and bubbly. Serve and enjoy immediately!
- Store leftovers in the refrigerator for up to 3 days.
Nutrition Information:
Yield: 10 Serving Size: 1Amount Per Serving: Calories: 330Total Fat: 25gSaturated Fat: 15.8gCholesterol: 79mgSodium: 570mgCarbohydrates: 8.6gNet Carbohydrates: 4.3gFiber: 4.3gSugar: 3.3gProtein: 13.3g