This easy Keto Green Bean Casserole is the perfect low carb side dish for your holiday table. Made with fresh green beans, a creamy homemade keto mushroom sauce, and topped with a crispy finish, it’s a must-have for Thanksgiving, Christmas, or any festive meal. You’ll love how quick it is—ready in just 40 minutes—and packed with flavor. This sugar-free, gluten-free recipe is so good, even non-keto guests will ask for seconds!
Made with just a few simple low carb ingredients, this delicious Keto Green Bean Casserole is the perfect side dish for weeknight dinners or holiday gatherings. It’s so tasty that even picky eaters who usually avoid veggies will love it.
This healthy green bean casserole is creamy, comforting, and easy to make. With just a handful of ingredients and minimal prep, it comes together quickly and pairs perfectly with almost any main dish—from roasted chicken to grilled steak or even a Thanksgiving turkey. It’s also a great way to get the kids to enjoy more vegetables!
- 1 Are Green Beans Keto-Friendly?
- 2 Why Are You Going To Love This Green Bean Casserole
- 3 Ingredients For This Low Carb Green Bean Casserole
- 4 How To Make Keto Green Bean Casserole
- 5 Recipe Variations for Keto Green Bean Casserole
- 6 Storing Ideas
- 7 Serving Ideas
- 8 Frequently Asked Questions
- 9 Green Bean Casserole
Are Green Beans Keto-Friendly?
Yes, green beans are keto-friendly! With only 7g of total carbs and around 4g net carbs per one-cup serving, they’re a great low-carb vegetable to enjoy on a ketogenic diet. They’re also high in fiber and nutrients, making them a smart and satisfying choice for keto meals.
Why Are You Going To Love This Green Bean Casserole
- Made with just a few naturally low-carb ingredients.
- Creamy, comforting, and full of flavor—you won’t believe it’s keto!
- A versatile keto side dish that pairs perfectly with chicken, turkey, steak, or any holiday main.
- Contains only 5g net carbs per serving, making it perfect for a low-carb lifestyle.
- Easy to make ahead—just reheat before serving.
- Great for meal prep or special occasions like Thanksgiving, Christmas, or even weeknight dinners.
- Kid-friendly and a sneaky way to get more veggies into your meals.
Ingredients For This Low Carb Green Bean Casserole
Here’s a quick look at the ingredients you’ll need to make this easy and keto-friendly green bean casserole. You can find the full measurements and instructions in the recipe card below.
- Green Beans – Fresh or frozen green beans both work. For the best texture and flavor, fresh green beans are ideal. Just trim the ends and blanch them briefly.
- Avocado Oil – A great keto-approved oil with a neutral taste, perfect for sautéing and roasting.
- Keto Cream of Mushroom Soup – You can easily make a homemade low carb mushroom soup that’s rich, creamy, and packed with flavor. It forms the base of the casserole sauce.
- Homemade Keto Fried Onions – Skip the store-bought crispy onions! These low carb fried onions are made from scratch and give that classic crunch without the extra carbs. The instructions for these are at the bottom of the post in the recipe card.
How To Make Keto Green Bean Casserole
Once you see how simple it is to make this low carb green bean casserole, it might just become your go-to keto side dish for holidays, family dinners, or any time you’re craving something warm and comforting.
- Preheat the Oven. Set your oven to 375°F (190°C) and lightly grease a 9×13-inch casserole dish.
- Boil the Green Beans. Bring a large pot of water to a boil. Add the fresh green beans and cook for about 5 minutes, just until they start to soften. Drain and set aside.
- Combine with Mushroom Soup. Add the blanched green beans and your homemade keto cream of mushroom soup to the casserole dish. Stir to combine evenly.
- Bake the Base. Place the dish in the oven and bake for 20 minutes, until the mixture is bubbly and slightly golden on top.
- Prepare the Keto Fried Onions. While the casserole bakes, make your low carb crispy onion topping using almond flour, seasonings, and sliced onions pan-fried until golden.
- Add the Topping and Finish Baking. Sprinkle the crispy onions over the casserole and bake for another 10 minutes, or until the topping is golden and crunchy.
Recipe Variations for Keto Green Bean Casserole
- Add Cheese: Sprinkle some grated parmesan cheese or shredded cheddar cheese on top before the final bake. It melts beautifully and adds a cheesy, golden crust.
- Crispy Bacon Topping: For extra texture and flavor, top your casserole with crumbled bacon before baking. It pairs perfectly with the creamy mushroom sauce and crispy onions.
- Use Different Vegetables: Add in chopped mushrooms, zucchini, or even cauliflower rice to give the casserole more variety while keeping it low carb.
- Spicy Twist: Mix in a dash of red pepper flakes or smoked paprika to give your casserole a little heat and extra flavor.
- Dairy-Free Option: Replace the cream in your keto mushroom soup with unsweetened almond milk or coconut cream for a dairy-free version.
Storing Ideas
Fridge – Store any leftover keto green bean casserole in an airtight container in the refrigerator for up to 5 days. When ready to enjoy, simply reheat in the oven or microwave until warmed through.
Freezer – You can freeze this low carb green bean casserole, but it’s best to do so before baking. Freezing the casserole after baking may change the texture of the green beans and make them mushy. To freeze:
- Assemble the casserole without baking.
- Wrap tightly with plastic wrap and foil.
- Freeze for up to 2 months.
When ready to bake, thaw overnight in the fridge, then bake as instructed. You may need to add 5–10 extra minutes to the baking time.
Serving Ideas
Sometimes I like to eat this green bean casserole, simple as it is, or you can also use it as a side dish on Thanksgiving and not only for many recipes. Here are some ideas:
Frequently Asked Questions
How To Choose The Perfect Green Beans?
You should always choose thinner green beans since they will be sweeter and crispier than thicker ones.
Also, you have to choose firm beans with bright green color.
Can I Use Frozen Green Beans?
Sure, this recipe will be the same as delicious, even if you use frozen green beans. You just have to make sure that they are defrosted.
Can I Make This Casserole Ahead Of Time?
Sure, you can make this green bean casserole ahead of time and place it in the freezer without the extra crispy topping. Then when ready to enjoy, thaw in the refrigerator overnight.
Then on the next day, add the topping and bake it according to the directions.
Green Bean Casserole
Description
Ingredients
- 1 1/2 lb green beans or canned beans
- 2 1/2 cups Cream Of Mushroom Soup
Homemade Fried Onions
- 1 onion large, sliced in half and then cut into 2-3 inch pieces
- 2 tbsp butter
- 2 tbsp oil
- 2 eggs beaten
- ¼ cup coconut flour
- 1 tsp garlic powder
- ½ tsp sea salt
- ½ tsp paprika
Instructions
- Preheat the oven to 375°F (190°C) and lightly grease a 9×13-inch casserole dish.
- Cook the green beans:Bring a large pot of water to a boil, then add the green beans and cook for about 5 minutes until just tender. Remove them with a slotted spoon or tongs.Time-saving tip: You can use canned green beans to skip this step.
- Assemble the casserole: Add the cooked green beans to the prepared dish, then pour the keto mushroom soup over the top. Stir until evenly combined. Bake for 20 minutes.
- Make the fried onions topping: Beat the eggs into a shallow bowl. Combine the coconut flour, garlic powder, paprika, and salt in another bowl. Dip onion pieces into the egg, then dredge into the flour mixture. Fry for a few minutes on each side until golden. Transfer to a plate lined with paper towels to drain.
- Add the topping:Remove the casserole from the oven, top with the crispy fried onions, and bake for another 10 minutes until golden and bubbly.
How do we calculate the nutrition info?
These nutrition facts listed are determined using nutrition information from the USDA Food Database. Our nutrition facts are accurate, but if you are using different products, please make your calculations. Net carb count is calculated by subtracting both fiber and sugar alcohols because they don’t raise blood sugar.