Try my delicious recipe for Gluten Free Green Bean Casserole using 3 ingredients only. With your homemade mushroom soup and fried onions, you can make the perfect homemade gluten-free green bean casserole that you can pair with your other favorite side dishes.

After making my crispy fried onions and gluten-free cream of mushroom soup, I quickly thought of making this side dish casserole recipe because why not? I love making whole different dishes out of my other recipes and being creative to explore different dishes I haven’t tried before. This is the story of my food blogger life.
Why You Will Love This Recipe
This gluten-free green bean casserole is a healthier alternative to traditional recipes, using fresh, whole ingredients instead of processed ones. You can easily customize and pair it with air-fried chicken, rice cauliflower recipes or grilled stuffed bell peppers, making it more delicious and suited to your preferences.
Plus, it’s the perfect side dish for holidays and special occasions, a classic choice like eggs and feta casserole that’s both tasty and satisfying for everyone.
The Best Side Dish
I’ve made a lot of side dishes in my life as a mom and the family cook, and I have to say, this one is up there as one of the best. Even my kids, who aren’t big on green beans, love it now because it’s mixed with their favorite mushroom soup and crunchy fried onions.
If you make this for the holidays or Thanksgiving, don’t be surprised when your kids and guests keep coming back for more. You might want to make a big batch because it’ll be gone before you know it.

3 Ingredients For This GF Green Bean Casserole:
Fresh Green Beans
Green beans are the base of this recipe as it is the name of the dish. In this recipe, you will need some fresh, green, and crispy beans to perfect this dish. If you are someone who does not eat green beans, I am telling you, this recipe will change your mind.
Gluten-Free French Fried Onions
Our gluten-free crispy onions are important for this recipe as they add additional crunchiness to the whole dish. I love the idea that I made my own homemade crispy fried onions recipe only for snacks, but I ended up using the rest of it to top my green bean casserole, and IT LEVELED UP!
Mushroom Soup
Mushroom soup will serve as the creamy base of the casserole mixed with the crispy green beans. Some recipes require using gluten-free flours and thickening agents but the good thing about having a homemade cream of mushroom soup is that you do not need to worry about those ingredients.
How To Make Gluten Free Green Bean Casserole Recipe
Take a step on making this casserole recipe by following the detailed instructions I prepared for you.
Do not forget to check the video for a straightforward process on how to make the casserole.
Kitchen Gadgets:
- Casserole Dish: A simple casserole dish will be used for baking the green bean casserole in the oven. Choose a size that comfortably fits all the ingredients without overflowing.
- Glass Bowl: A large mixing bowl is perfect for combining the cream of mushroom soup, fried onions, and green beans.
- Spoon or Spatula: Use a spoon or spatula to mix the ingredients in the glass bowl thoroughly. It will also help you evenly coat the green beans with the creamy mushroom soup mixture in the casserole dish.
Ingredients:
- Green Beans: Fresh or frozen green beans will work perfectly for this dish. Look for crisp, vibrant green beans in the grocery store. If fresh is not available, frozen green beans are a good substitute. Using canned green beans is the last option.
- Mushroom Soup: Look for a gluten-free cream of mushroom soup or use mushroom sauce. But if you prefer using a homemade cream of mushroom soup, it is perfect.
- Fried Onions: Gluten-free fried onions add a delicious crunch and flavor to the top of the green bean casserole.
*Exact measurements are listed in the recipe card below.
FULL INSTRUCTIONS WITH STEPS FOR MAKING GLUTEN-FREE GREEN BEAN CASSEROLE FROM SCRATCH
First Step: Prepare All Ingredients
Place all the ingredients separately in each bowl for easy preparation. At the same time, preheat your oven to 400°F (200°C).

Second Step: Blanch
Blanch the green beans until they turn tender but still slightly crisp. Drain them and set aside.

Third Step: Mix The Ingredients
Mix all the ingredients by pouring the mushroom soup onto the blanched and drained green beans. Mix with a spoon or spatula until the green beans are covered with mushroom sauce or soup.

Fourth Step: Arrange
After combining the green beans and mushroom soup, transfer the green bean mixture to the casserole dish and spread it out evenly.
Place the gluten-free French-fried onions on top of the green beans and prepare for baking. Sprinkle the remaining onions on top of the mixture until it is almost fully covered.

Fifth Step: Bake
Bake the casserole green beans at 400F (200C) for 10 minutes or until the casserole is heated and the onions are golden and crispy.
Once ready, serve hot with roasted meats like turkey or chicken for a whole meal.

TRICKS AND TIPS:
- Fresh green beans: If possible, use fresh green beans instead of frozen ones. They will have a crisper texture and fresher flavor, improving the overall taste of your casserole.
- Blanching: Blanch the green beans in boiling water for a few minutes to preserve their vibrant green color before adding them to the casserole.
- Onions: These crispy onions should not be skipped when making this recipe because they make it more flavorful and crunchy.
FREQUENTLY ASKED QUESTIONS
Can I Make The Green Bean Casserole Ahead Of Time and Serve It Later?
Yes. One of the good things about this casserole recipe is that you can make it ahead if you want to have it at tomorrow’s party but do not have time to prepare it on the actual day. You can prepare it as usual but do not bake it yet.
Cover it tightly with plastic wrap or aluminum foil and pop it in the fridge. You can keep it there for up to 24 hours. When you are ready to serve it, take it out of the refrigerator and let it sit at room temperature for about 30 minutes. Then, bake it following the recipe, but add a few extra minutes since it has been chilled.
Is It Possible To Make A Green Bean Casserole Without Mushroom Soup?
Yes, it is possible to make a green bean casserole without mushroom soup. But since it needs a creamy sauce, you can create a homemade one using ingredients like heavy cream, milk, and gluten-free mushroom powder to keep the mushroom flavor in the dish.
Is Canned Soup Okay For Making This Recipe?
Yes, canned soup is okay for this recipe since it is a convenient and time-saving option that still gives the same rich flavor as homemade mushroom soup. Make sure to choose a gluten-free one if you want it to be clean and healthy.

What to Serve With This Easy Gluten Free Green Bean Casserole?
This gluten-free casserole pairs well with any main dish and easy-to-make sides. Serve it with roasted meats like turkey, chicken lettuce cups, popcorn chicken, and pork scotch fillet since a vegetable side is always perfect with savory meats.
Traditional green bean casseroles are also perfect when served with fried dill pickles, dumplings or white rice, even protein bread slices.
If you feel extra adventurous, top your baked green bean casserole with more onion and garlic flakes to add flavor. I bet they will be perfect as well with goat cheese salad.
Store them in a sealed container in the refrigerator for about 3-4 days.
When you are ready to enjoy them again, warm up a serving in the microwave or reheat the whole thing in the oven until it is nice and bubbly.
Our Best And Must-Try Recipes
Let me share some of our best clean-eating recipes you can serve for dinner and for all occasions. Try our casserole dishes like broccoli and cauli bake, crack chicken casserole and gluten-free chicken enchiladas for the perfect dinner or casserole party.
For your side dishes, with this green bean recipe, serve this dehydrated broccoli and chicken mu pickled daikon, a complete set of side dishes from which you can choose.
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Gluten Free Green Bean Casserole
Equipment
- 1 Spatula
Ingredients
- 2 Cups Cream of Mushroom Soup
- 3 Cups Fried Onions
- 4 Cups Green Beans
Video
Instructions
- Place all the ingredients separately in each bowl for easy preparation. At the same time, preheat your oven to 400°F (200°C).
- Blanch the green beans until they turn tender but still slightly crisp. Drain them and set aside.
- Mix all the ingredients by pouring the mushroom soup onto the blanched and drained green beans. Mix with a spoon or spatula until the green beans are covered with mushroom sauce or soup.
- After combining the green beans and mushroom soup, transfer the green bean mixture to the casserole dish and spread it out evenly. Place the gluten-free French-fried onions on top of the green beans and prepare for baking. Sprinkle the remaining onions on top of the mixture until it is almost fully covered.
- Bake the casserole green beans at 400F (200C) for 10 minutes or until the casserole is heated and the onions are golden and crispy. Once ready, serve hot with roasted meats like turkey or chicken for a whole meal.
Notes
- Fresh green beans: If possible, use fresh green beans instead of frozen ones. They will have a crisper texture and fresher flavor, improving the overall taste of your casserole.
- Blanching: Blanch the green beans in boiling water for a few minutes to preserve their vibrant green color before adding them to the casserole.
- Onions: These crispy onions should not be skipped when making this recipe because they make it more flavorful and crunchy.
Nutrition
Disclaimer
Please note that nutrient values are estimates only. Variations can occur due to product availability and manner of food preparation. Nutrition may vary based on methods of origin, preparation, freshness of ingredients, and other factors.
Extra Desserts
As a proper meal can not be without a small portion of dessert at the end, I am attaching some of the recipes you might enjoy.
Great recipes, eager to try them
So happy you do.