Need more keto casserole recipes? Try my keto chicken casserole, keto taco casserole, and keto pizza casserole next. Come the holidays, my low-carb green bean casserole becomes a hot commodity. Traditional green bean casserole, while delicious, is not keto-friendly. So, I made a few low-carb swaps and now it’s my most highly requested casserole recipe!
Why I love this recipe
It’s fresh AND fast. No frozen green beans or canned soup here! That addictive crunch topping! We all know the best part about green bean casserole is the crispy onion topping–and mine is the best. Kid-friendly. If you’ve been wondering how to get kids to eat their greens, let this recipe do the work for you. Easy to make ahead. When I visit home for the holidays, I dread squeezing a full Thanksgiving dinner into my mom’s tiny kitchen. So, I make this casserole in advance and pop it in the oven right before dinner.
Ingredients needed
Fresh green beans. Preferably fresh, trimmed green beans. Oil. To fry. Onions. Caramelizes in the casserole, giving a slightly sweet flavor. Mushrooms. A must for green bean casserole! Garlic. I used jarred garlic, but fresh works too. Butter. I used unsalted butter. If you use salted butter, reduce the amount of added salt. Heavy cream. My secret ingredient! Many green bean casserole recipes call for milk or half and half, but I find using heavy cream gives it a richer texture akin to condensed cream of mushroom soup. Vegetable stock. Look for low-sodium stock. You can also use chicken broth or mushroom broth. Salt and black pepper. To taste.
For the fried onions:
Onion slices. The thinner you slice the onions, the crispier the topping will be! Milk OR heavy cream. To help the flour stick to the onions. Almond flour. To dredge the onions. Use blanched almond flour, almond meal, or make keto bread crumbs with crushed pork rinds. Salt and black pepper. To taste. Oil. To fry.
How to make keto green bean casserole
I’ve included step-by-step photos below to make this recipe easy to follow at home. For the full printable recipe instructions and ingredient quantities, scroll to the recipe card at the bottom of this post. Step 1- Prep work. Preheat the oven to 180C/350F and grease a casserole dish. Step 2- Prepare the onions. In a small bowl, combine the onion topping ingredients and toss to coat. Step 3- Fry the onions. Heat oil in a large skillet over medium heat. Once hot, add the onion mixture and fry for 4-5 minutes, until golden. Set aside. Step 4- Cook the green beans. In a large pot, boil 3-4 cups of water. Once boiling, add the green beans and blanch them in the water for 3 minutes. Drain and transfer to a large bowl. Step 5- Cook the mushrooms. Add olive oil to a large skillet over medium heat. Sauté the onions for 5 minutes, then add the garlic and mushrooms and sauté for 3-4 minutes. Transfer the veggies to the bowl with the green beans. Step 6- Build the sauce. Return the skillet to the heat and add butter. Add the stock, cream, salt, and pepper, and simmer for 3-4 minutes. Pour the soup mixture over the green beans and stir to combine. Step 7- Bake. Transfer the green bean mixture to the baking dish. Bake for 35 minutes, then sprinkle with the crispy onions. Return the dish to the oven and bake for 10 minutes or until bubbling.
Arman’s recipe tips
Make it in advance. Prepare the casserole and store the casserole and toppings separately in the fridge. Refrigerate it for up to three days, then let it come to room temperature for 20 minutes before baking as directed. Make a creamier sauce. Add a dollop of softened cream cheese and a handful of shredded mozzarella cheese. You can thank me later! Add bacon. Isn’t everything better with bacon?
Storage instructions
To store: Keep leftovers in an airtight container in the refrigerator for up to one week. To freeze: Transfer the leftovers to a freezer-safe container and freeze for up to six months. Reheating: Microwave single-servings in 30-second intervals or place in a casserole dish and bake in a preheated oven until warm.
Frequently asked questions
More keto-friendly holiday recipes
Cauliflower mac and cheese Keto mashed potatoes Cauliflower potato salad Keto rolls Or any of my keto side dishes
