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An easy recipe for gluten-free green bean casserole. This gluten-free side dish recipe also has a dairy-free and vegan option.
Originally published November 2019, updated November 2012.
Gluten-Free Green Bean Casserole
This gluten-free green bean casserole tastes just like the classic green bean casserole that everyone makes during the holidays. It is a combination of creamy mushroom soup, green beans, and crispy sweet fried onions.
This classic casserole recipe is easily modified to make it gluten-free. With just a few changes to a gluten-free version of the cream of mushroom soup and the fried onions, and you have a gluten-free green bean casserole recipe.
I have also included a dairy-free and vegan option to this green bean casserole as well.
How To Make Gluten-Fee Green Bean Casserole
Gluten-Free Fried Onions Step
- Thinly slice the onions.
- Add milk (or dairy-free milk) and vinegar to make buttermilk to a pie pan or shallow dish and allow to sit for 2-3 minutes.
- Add the onions to the buttermilk and soak for 5-10 minutes. (photo 1)
- In a plastic storage bag, add the gluten-free flour, cornstarch, seasoned salt, and mix well. (photo 2)
- In a large pan, heat vegetable oil to 375°F degrees.
- Add the buttermilk-soaked onions to the flour mixture in the plastic bag and turn the bag over and over until the onions are well coated. (photo 3)
- Add the battered onions to oil, frying in batches, until golden brown. (photo 4)
- Remove the onions from oil with a slotted spoon and drain on a paper towel-lined plate. (photo 5)
Gluten-Free Green Bean Casserole Step
- Pre-Heat your oven to 350°F and spray a 1 1/2-quart casserole dish with gluten-free cooking spray.
- In a small bowl, mix together the gluten-free cream of mushroom soup (or gluten-free and dairy-free soup), gluten-free Worcestershire sauce, milk (or dairy-free milk), and pepper until smooth. (photo 1)
- Add the drained canned green beans to the casserole dish.
- Pour the soup mixture over the green beans.
- Sprinkle 1 cup of the gluten-free fried onions over the soup and gently stir to mix the ingredients together. (photo 3)
- Place on the middle rack and bake for 25 minutes.
- Sprinkle with the remaining gluten-free fried onions and bake for another 10-15 minutes until bubbly and the sides of the casserole start to brown. (photo 3)
- Store leftovers in an airtight container and refrigerator.
- Leftovers can be reheated in the microwave or oven.
Gluten-Free Cream Of Mushroom Soup
Cream of mushroom soup is one of the key ingredients to the classic green bean casserole. There are several options of gluten-free cream of mushroom soup on the market for you to choose from.
I personally make my own Gluten-Free Cream Of Mushroom Soup. It’s super easy to make and has a dairy-free and vegan option for the recipe.
For this green bean casserole, you would only need to make half of my recipe. You could make the full recipe and either refrigerate or freeze the rest of the soup for later use.
If you do not want to make your own gluten-free cream of mushroom soup, you can easily buy the soup. Before going dairy-free, I tried several of the brands of gluten-free cream of mushroom soups.
- Pacific Foods Organic Cream of Mushroom Soup- I like this brand the best – It’s thick and creamy.
- Progresso Gluten-Cream of Mushroom Soup- This soup is really waterly, and I would only recommend using 1 cup of this soup.
- Great Value Gluten-Free Cream of Mushroom Soup- I have not tried this soup, but I have seen lots of good comments about it.
- Imagine Portobello Mushroom Creamy Soup- Not only is this brand gluten-free but it is also dairy-free. It’s super thick and I use it often. I order it from Amazon or buy it from Whole Foods.
- Full Flavor Foods Cream of Mushroom Soup- This is also a really good gluten-free soup mix that makes a creamy soup.
Gluten-Free Fried Onions
Fried onions are what really make green bean casserole! I love the crunchy and light sweetness of fried onions.
There are several brands of gluten-free fried onions that you can now buy at the grocery store. Some of the store you can find gluten-free fried onions are Aldi, Kroger, and Whole Foods.
I know not everyone has access to these brands, so I included a recipe for homemade gluten-free fried onions.
If you do not want to make your own gluten-free fried onions, and you can’t find them at the grocery store you could use crushed Funyuns instead. Funyuns are gluten-free, but they are not dairy-free.
Fresh, Frozen, or Canned Green Beans?
If you prefer you can use either fresh or frozen green beans. If you use fresh or frozen green beans you may need to add a little salt to the casserole and it will have more texture.
- For fresh green beans: trim, cut, and briefly boil or microwave the green beans.
- For frozen green beans: cook the frozen beans until tender-crips, about 5 minutes.
Can I Make The Green Bean Casserole Ahead Of Time?
This green bean casserole recipe can be made up to 48 hours ahead of time. Prepare as directed except leave out the fried onions.
Place the onions in an air-tight container or plastic bag. Add the onions before baking and bake as directed. Allow the casserole to come to room temperature, about 15 minutes or you could add another 5-10 minutes to the baking time if it is still really cold.
Dairy-Free and Vegan Green Bean Casserole
I have included a dairy-free and vegan option in this gluten-free green bean casserole recipe. For the dairy-free and vegan option, I used my recipe for Gluten-Free Cream of Mushroom Soup and unsweetened almond milk to make the homemade buttermilk. If you are vegan you will want to use your favorite gluten-free and vegan Worcestershire sauce.
I have also used Imagine Portobello Mushroom Creamy Soup, which is both gluten-free and dairy-free. It is creamy and thick and works beautifully in casseroles. I order it from Amazon or buy it from Whole Foods.
Most of my family is also dairy-free (including me), so I always try to include a dairy-free option in my recipes.
Some of my favorite dairy-free alternatives that I like to cook with are unsweetened almond or coconut milk. I also like cooking with olive oil or Smart Balance butter.
Easy Gluten-Free Green Bean Casserole
This gluten-free green bean casserole is one of my favorite gluten-free side dishes that I make for Thanksgiving and Christmas. It’s a recipe that is easy to make gluten-free and everyone always enjoys it!
More Gluten-Free Side Dish Recipes To Try!
- Gluten-Free Southern Baked Macaroni and Cheese
- Easy Gluten-Free Stuffing {Dairy-Free}
- Gluten-Free Sweet Potato Casserole {Dairy-Free Option}
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Gluten-Free Green Bean Casserole {Dairy-Free Option}
Ingredients
Gluten-Free Fried Onions
- 2 large sweet onions, thinly sliced
- 1 cup milk, dairy-free use almond, cashew or coconut milk
- 1 tablespoon white vinegar
- 1/2 cup gluten-free all-purpose flour, I like Pillsbury gluten-free
- 1/2 cup cornstarch
- 1 tablespoon gluten-free seasoned salt
- 3 cups vegetable oil
Casserole
- 1 10.5 ounce can gluten-free cream of mushroom soup , Or 1 1/4 cup of my homemade gluten-free cream of mushroom soup {dairy-free option}
- 1/4 cup milk, dairy-free use almond, cashew or coconut milk
- 1 teaspoon gluten-free Worcestershire sauce, I like Lea and Perrins. For vegan use your favorite vegan and gluten-free Worcestershire sauce
- 1/8 teaspoon ground black pepper
- 2 14.5 ounce cans whole green beans, drained
Instructions
Gluten-Free Fried Onions Step
- Thinly slice onions.
- Add milk (or dairy-free milk) and vinegar to make buttermilk to a pie pan or shallow dish and allow to sit for 2-3 minutes.
- Add the onions to the buttermilk and soak for 5-10 minutes.
- In a plastic storage bag add the gluten-free flour, cornstarch, seasoned salt, and mix well.
- In a large pan heat vegetable oil to 375°F degrees.
- Add the buttermilk soaked onions to the flour mixture in the plastic bag and turn the bag over and over until the onions are well coated.
- Add the battered onions to oil, frying in batches, until golden brown.
- Remove the onions from oil with a slotted spoon and drain on a paper towel-lined plate.
Casserole
- Pre-Heat your oven to 350°F and spray a 1 1/2-quart casserole dish with gluten-free cooking spray.
- In a small bowl mix together the gluten-free cream of mushroom soup (or gluten-free and dairy-free soup), gluten-free Worcestershire sauce, milk (or dairy-free milk) and pepper until smooth.
- Add the drained canned green beans to the casserole dish.
- Pour the soup mixture over the green beans.
- Sprinkle 1 cup of the gluten-free fried onions over the soup and gently stir to mix the ingredients together.
- Place on the middle rack and bake for 25 minutes.
- Sprinkle with the remaining gluten-free fried onions and bake for another 10-15 minutes until bubbly and the sides of the casserole start to brown.
- Store leftovers in an air-tight container and refrigerate.
- Leftovers can be re-heated the microwave or oven.
Notes
- For dairy-free option I used my recipe for gluten-free cream of mushroom soup (1 1/4 cups) and almond milk.
- See post for recommended brands of gluten-free cream of mushroom soup.
- See post for store-bought options for the fried onions.
- Store leftovers in an airtight container and refrigerator.
- Leftovers can be reheated in the microwave or oven.
- Mama says, "check all of your labels!"
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
This is my 3rd year making this and it is always amazing! I have to hide the onions from family so they don’t eat them all before it’s done.
This is now a family favorite! So delicious and incredibly easy to make. The gluten-free dairy-free onion rings on top were so good that I had to stop my husband from coming by in the kitchen and eating a handful before they went on the green bean casserole in fear I’d not have enough to put on top of the casserole. Thank you for sharing!!!