Best Gluten Free Green Bean Casserole (how to freeze)

This gluten free green bean casserole recipe is made with fresh green beans and a mushroom sauce. Check out all these easy make-ahead Thanksgiving recipes.

Best Gluten Free Green Bean Casserole (how to freeze)

Classic Green bean casserole is beloved, especially during Thanksgiving and Christmas. 

However, enjoying this side dish can be challenging for those with dietary restrictions or allergies. 

Fortunately, making a gluten-free version of green bean casserole is possible and delicious. With a homemade cream of mushroom soup and a simple switch with your toppings, this fresh recipe will be your new family favorite. 

This comprehensive guide provides step-by-step instructions on creating a gluten-free green bean casserole.

Additionally, we’ll explore the benefits of freezing this dish and answer frequently asked questions to ensure your gluten-free green bean casserole is always ready to serve.

How to Make the Best Gluten Free Green Bean Casserole (how to freeze)

Scroll down to the bottom for the recipe with a complete ingredient list and step-by-step instructions for this traditional green bean casserole.

Best Gluten Free Green Bean Casserole (how to freeze)

Prepare the Topping:

In a small bowl, combine panko breadcrumbs and canned fried onions.

Mix well with two tablespoons of olive oil (or melted butter).

Pour into a resealable bag for storage, if freezing this dish.

How to Blanche Green Beans

How to Blanch Green Beans:

Blanching green beans is a quick cooking method where fresh green beans are briefly boiled in hot water for  4 minutes until they become bright green and slightly tender. 

Blanching helps to preserve the beans’ vibrant color, texture, and nutrients, while also halting the cooking process, making them ideal for use in various dishes or for future storage.

How to Blanch Green Beans

Immediately following this process, you plunge the beans into ice water, creating an “ice bath” that rapidly cools them down.

Set aside.

Best Gluten Free Green Bean Casserole (how to freeze)
Best Gluten Free Green Bean Casserole (how to freeze)

Prepare the Gluten Free Cream of Mushroom  Soup:

In the same hot pot you boiled the green beans, melt the unsalted butter over medium-high heat.

Add the sliced mushrooms, season with salt and pepper, and sauté until they release moisture and it evaporates, approximately 6 minutes. Stir in the minced garlic, taking care not to let it burn.

Add the gluten-free flour and cook for 1 minute, stirring constantly. Pour in the chicken broth and bring it to a simmer, stirring continuously.

Add the heavy cream, reduce the heat to medium, and simmer until the sauce thickens and reduces to about 3 1/2 cups, which will take approximately 12 minutes.

Season the sauce with salt and pepper to taste.

Best Gluten Free Green Bean Casserole (how to freeze)

Combine the Green Beans and Sauce:

Add the blanched green beans to the cream sauce, stirring until they are evenly coated.

Arrange the mixture in an even layer in a 3-quart (or 13 x 9″) baking dish.

Best Gluten Free Green Bean Casserole (how to freeze)

Prepare for Freezing:

Store the panko and onion topping in a resealable bag or container in your pantry (to keep it from getting soggy in the freezer).

Freeze the casserole in a freezer-safe container or disposable foil pan.

Here are some frequently asked questions about how to make this gluten-free green bean casserole recipe:

Best Gluten Free Green Bean Casserole (how to freeze)

How to Make Green Bean Casserole Gluten-Free?

Are you following a gluten-free diet? This recipe is gluten-free. This is made possible through these recommended substitutions:

Can I make this casserole dairy-free?

You can substitute dairy-free alternatives like almond, coconut, or oat milk for regular milk and use dairy-free butter to achieve a dairy-free green bean casserole. 

Gluten-Free Panko

Is Panko Gluten Free?

Panko breadcrumbs are light and airy Japanese-style breadcrumbs commonly used for breading and frying foods.

Regular panko is not gluten-free. 

Gluten-free panko breadcrumbs are a variation of traditional panko breadcrumbs that do not contain gluten, making them suitable for people with gluten sensitivities or celiac disease. 

You can find this ingredient in most well-stocked grocery stores, usually in the following store locations:

  • Gluten-Free Aisle: Many grocery stores have a dedicated gluten-free section where you can find gluten-free products, including breadcrumbs. Look for the gluten-free panko breadcrumbs in this section. This aisle may also contain other gluten-free products like pasta, flour, and snacks.
  • Baking Aisle: Sometimes, gluten-free breadcrumbs, including panko, may be in the baking aisle with other baking supplies. Check near the regular breadcrumbs and flour.
  • Specialty Food Section: Some grocery stores place gluten-free items, including panko breadcrumbs, in a specialty or health food section. Be sure to explore this area if your store has one.

Be aware even if the product is labeled as gluten-free, be aware that cross-contamination can occur during production.

If you have a severe gluten allergy or sensitivity, you may want to contact the manufacturer to inquire about their cross-contamination prevention measures.

Are French’s Fried Onions Gluten Free?

The French’s Fried Onions ingredient list includes onions, palm oil, wheat flour, dextrose & salt. They are not gluten-free because they contain wheat.

Many store brands offer gluten-free options, especially around the holidays. 

We have had incredible success with the ALDI gluten-free french fried onions, but you can also check here for a variety of online grocery options. 

This gluten-free ingredient is always available around the holidays, so stock up when you see it!

Best Gluten Free Green Bean Casserole (how to freeze)

Can you Freeze Gluten Free Green Bean Casserole?

This gluten free casserole is a make-ahead freezer recipe, but you must store the prepared topping separately.

Store the onion and panko topping in a resealable baggie and place it in your pantry. 

Place the prepared casserole in a freezer-safe container or a foil pan, sealing it securely to prevent freezer burn. 

Allow the casserole to thaw in the refrigerator for 1-3 days before your event, and keep it covered with plastic wrap. 

What Freezer-Safe Container Should I Prepare This Gluten Free Green Bean Casserole In?

Selecting the right containers can make all the difference in freezing dishes. Here are some options:

  • Glass or Plastic Containers: If you prefer something more durable, consider investing in glass or BPA-free plastic containers with airtight lids. They can be reused for future freezing needs.
  • Foil Pans or Containers: These come in various sizes and are ideal for freezing casseroles. They’re easy to stack in the freezer and can be recycled afterward. I purchase these from my local dollar store.
Gluten Free Green Bean Casserole

Gluten Free Green Bean Casserole

Yield: 12 servings
Prep Time: 15 minutes
Cook Time: 30 minutes
Total Time: 45 minutes

This make-ahead gluten-free green bean casserole is perfect for your Thanksgiving feast. Once you try this fresh take on this casserole, you'll never return to the canned version again.


  • 1/2 cup gluten-free panko breadcrumbs
  • 2 tablespoons olive oil (or melted butter)
  • 1/4 teaspoon table salt
  • 1/8 teaspoon ground black pepper
  • 3 cups canned gluten-free fried onions (about 6 oz.)
  • 2 lbs green beans, ends trimmed and halved
  • 3 tablespoons unsalted butter
  • 1 lb sliced white button mushrooms
  • 3 medium garlic cloves, minced
  • fresh ground black pepper
  • 3 tablespoons gluten-free flour
  • 1 1/2 cups low sodium chicken broth
  • 1 1/2 cups heavy cream


  1. Mix panko and fried onions in a small bowl with two tablespoons of olive oil (or melted butter). Set aside.
  1. Fill a large bowl with ice water. Set aside.
  2. Bring a large pot of water to a boil. Add two tablespoons of salt and the green beans. Cook beans until bright green and crisp-tender, for about 4 minutes.
  3. Drain beans in a colander and plunge into the bowl of ice water to stop cooking. Set aside.
  4. Add butter to your now-empty pot and melt over medium-high heat until foaming subsides.
  5. Add mushrooms, salt and pepper them.
  6. Add the garlic next. Make sure to watch this so that it doesn’t burn.
  7. Cook this mixture until mushrooms release moisture and liquid evaporates, about 6 minutes.
  8. Add flour and cook for 1 minute over medium heat, stirring constantly. Stir in broth and bring to simmer, stirring constantly. Add cream, reduce heat to medium, and simmer until sauce is thickened and reduced to 3 1/2 cups, about 12 minutes—season with salt and pepper to taste.
  9. Add green beans to the sauce and stir until evenly coated. Arrange in even layer in 3 quart (or 13 x 9") freezer-safe dish or foil pan.
  10. Freeze your casserole in a freezer-safe container or in a foil pan. You can freeze this green bean casserole for up to 2-3 months. Store your onion & panko topping in a baggie in your pantry until your day of preparation.
  11. Allow the casserole to thaw 1-3 days before your event in your airtight container in the fridge.
  12. When preparing: Heat the casserole in a 425-degree oven for 10 minutes. Add the onion topping and bake for an additional 20 minutes. You want to bake this until the top is golden brown and the sauce is bubbling on the edges.


Follow the instructions within the post to make this a gluten-free green bean casserole with suggested gluten-free products. If you do not have dietary restrictions, use all-purpose flour, regular Panko, and fried onions for substitutions.

Nutrition Information:
Yield: 12 Serving Size: 1
Amount Per Serving: Calories: 305Total Fat: 22gSaturated Fat: 10gTrans Fat: 0gUnsaturated Fat: 10gCholesterol: 41mgSodium: 271mgCarbohydrates: 25gFiber: 4gSugar: 6gProtein: 6g

The calorie and nutrition information provided with our recipes is intended to be an estimate based on commonly used ingredients and serving sizes. However, individual nutritional needs may vary, and the actual values can depend on factors such as specific brands of ingredients, preparation methods, and portion sizes. Please use these figures as estimates.

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Did you try this recipe? We would love to hear what you thought of this holiday classic side dish!

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Published September 06, 2023 by:

Amy Allen Clark is the founder of You can read all about her here.

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