If green bean casserole is a must on your holiday table—but fried onions and canned soup don’t fit your keto lifestyle—this version is for you. This Keto Green Bean Casserole is rich, creamy, and full of flavor without unnecessary carbs. Made with real ingredients and simple steps, it delivers classic comfort food without missing the fried onions at all.
I love serving this keto green bean casserole alongside my Keto Meatloaf for an easy, filling dinner that feels cozy and satisfying without the carbs.
Ingredients
- 2 bags frozen green beans
- ½ medium onion (or 1 small onion), diced
- 6 Tbsp butter, divided
- 8 oz baby bella mushrooms, chopped
- 2 garlic cloves, minced (or 1 tsp minced garlic)
- 1 cup chicken broth (or 1 cup water + 1 tsp of my Keto Chicken Bouillon Paste)
- ½ cup heavy whipping cream
- 4 oz cream cheese
- 1 tsp onion & herb seasoning or my Homemade Ranch Seasoning
- 1–2 cups freshly shredded Parmesan cheese
- Salt and pepper, to taste
Instructions
- Preheat oven to 350°F.
- Steam the frozen green beans according to package directions. Drain well and place them into a 9×13 casserole dish.
- In a large skillet over medium heat, melt 3 tablespoons of butter. Add the diced onion and garlic and sauté for 3–4 minutes, until translucent and fragrant.
- Add the chopped mushrooms and cook for 4–6 minutes, stirring occasionally, until most of the liquid has evaporated.
- Pour in the chicken broth and add the remaining 3 tablespoons of butter. Once the butter has melted, stir in the heavy whipping cream and cream cheese.
- Add the onion & herb seasoning, along with salt and pepper to taste. Stir and cook until the cream cheese is fully melted and the sauce is smooth.
- Pour the creamy mushroom sauce over the green beans and gently mix until everything is evenly coated.
- Cover the casserole dish with foil and bake for 20 minutes.
- Remove the foil, sprinkle the top with shredded Parmesan cheese, and return to the oven. Bake uncovered until the cheese is fully melted and lightly golden.
📖 Nutrition Information
Serving Size: 1 cup
Servings Per Recipe: 9
| Nutrient | Amount |
|---|---|
| Calories | 205 |
| Fat | 16 g |
| Protein | 8 g |
| Total Carbs | 8 g |
| Fiber | 3 g |
| Net Carbs | 5 g |
Disclaimer: Nutrition information is an estimate only and may vary based on brands used, portion sizes, and substitutions.
Notes & Tips
- I skip fried onions because they add unnecessary carbs, and this casserole is delicious on its own.
- If you want a crunchy topping, Parmesan crisps are a great low-carb option.
- For holiday gatherings or potlucks, I double this recipe—it disappears fast.
- Be sure to drain the green beans well so the casserole doesn’t become watery.
- This keto green bean casserole pairs perfectly with savory mains like my Big Mac Patties for an easy low-carb dinner.
This post may contain affiliate links. If you make a purchase through one of these links, I may earn a small commission at no extra cost to you.
Final Thoughts
This Keto Green Bean Casserole proves that you don’t need processed ingredients or carb-heavy toppings to make a classic comfort dish shine. It’s creamy, flavorful, and perfect for holidays or everyday dinners. Whether you’re feeding a crowd or just your family, this is a side dish you’ll come back to again and again.