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Gluten-Free Green Bean Casserole (Vegan)

Flavorful and tasty, this gluten-free green bean casserole is a classic American side dish that you must have at your Thanksgiving table! A creamy filling of tender green beans topped with crispy onions, it’s totally dairy-free and vegan too, but no one would care!

A portion of gluten-free green bean casserole on plate.

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What is Green Bean Casserole?

If you’re not familiar with this iconic side dish, the traditional green bean casserole is an American baked dish whose main ingredients include green beans, cream of mushroom soup, and fried onions. The ingredients are mixed together, topped with a final layer of crispy fried onions and then baked in a casserole dish.

Hugely popular in the United States as a side dish for Thanksgiving dinner, green bean casserole can also be enjoyed during everyday dinners.

Top down view of gluten-free dairy-free green bean casserole on plate.

A Gluten-Free and Vegan Version

Today we’re making a gluten-free version of this classic Thanksgiving dish with few slight twists.

I’m using a homemade gluten-free and dairy-free roux instead of cream of mushroom soup, and using dairy-free cheese as well as gluten-free fried onions.

Why This Recipe Works:

  • Simple Ingredients: The ingredients required for this vegan gluten free green bean casserole are easily accessible at the local grocery store (nothing fancy required!).
  • Easy to Make: Preparing this green bean bake is uncomplicated, and you can prepare it in under an hour!
  • Totally Gluten-Free, Dairy-Free & Vegan: The good news is that this green bean casserole recipe is 100% gluten-free, dairy-free and vegan, which means that even those with Celiac disease or gluten or lactose intolerances can enjoy it without issues!
cornbread in a cast iron skillet
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Holding up a portion of gf green bean casserole.

Ingredients You’ll Need:

Here’s a visual overview of the ingredients required for this gluten-free green bean casserole recipe.

(For exact measurements, please scroll down to the printable recipe card at the bottom of this post.)

Ingredients for gluten-free green bean casserole recipe laid out on board.

Recipe Notes + Substitutions:

  • Gluten-Free Flour: I recommend using a good-quality gluten-free flour all-purpose flour blend that is made up of light flours/starches (such as rice flour, tapioca starch, corn starch or potato starch). I do NOT recommend using a gluten-free flour blend made up of heavier flours (such as garbanzo bean flour).
  • Butter: I used a dairy-free butter (vegan butter) to keep this recipe vegan. Alternatively, if you are not lactose-intolerant, go ahead and use regular butter instead.
  • Unsweetened Almond Milk: I used an unsweetened version of my homemade almond milk, but you can also use another non-dairy-milk instead (such as cashew milkrice milkoat milk or coconut milk etc). Alternatively, if you are not lactose-intolerant, go ahead and use regular milk or heavy cream if you prefer.
  • Tamari Sauce: I used gluten-free tamari sauce to keep this recipe gluten-free. Alternatively, you may also use coconut aminos. If you are not Celiac or gluten-intolerant, go ahead and use regular soy sauce instead.
  • Nutmeg: I like adding a pinch of ground nutmeg to add flavor. Feel free to leave it out if you’re not a fan of nutmeg.
  • Green Beans: I used fresh green beans, but you can also use frozen green beans or canned green beans if that’s what you have. Just make sure to cut the green beans into equally sized pieces (approximately 1.5 to 2-inches long).
  • Fried Onions: I used my homemade gluten-free fried onions for this green bean bake, but you can also use storebought fried onions.
  • Cheddar Cheese: I used dairy-free cheese to keep this recipe dairy-free. However, if you are not lactose-intolerant, you can also use regular mozzarella cheese or cheddar cheese instead.

How to Make Gluten-Free Green Bean Casserole (Step by Step):

1. Preheat Oven

Preheat the oven to 370F.

2. Cook Butter with Flour

In a medium saucepan or large pot, melt the dairy-free butter and cook it with the gluten-free all-purpose flour for 2 minutes, stirring.

Cooking a mixture of butter and flour.

3. Add Milk, Salt and Spices

Pour in the almond milk and gluten-free tamari sauce and stir the sauce with a spatula or whisk to break up all the lumps.

Add salt, ground black pepper, ground nutmeg and mix. If the sauce is too thick, add more milk and stir.

A pot of cream sauce sprinkled with spices.

4. Combine Green Beans, Shredded Cheese and Fried Onions

Place green beans, 2/3 cup shredded cheese, and most of the fried onions (reserving 3 tablespoons for later) in a bowl.

A bowl with green beans, crispy onions and shredded cheese.

5. Add Sauce and Stir Well

Add the sauce from the saucepan and stir with a spatula.

Green bean mixture in white bowl.

6. Transfer to Baking Dish

Transfer the green bean mixture to a 12” x 12” square casserole dish (you can also use a rectangular baking dish). Bake for 25 minutes.

Green bean mixture in glass baking dish.

7. Add Remaining Cheese and Onions

Add the remaining shredded cheese and fried onions on top and bake for another 10 minutes.

8. Serve and Enjoy

Serve the creamy green bean casserole hot and enjoy!

Freshly baked green bean casserole.

Dish by Dish Tips/Tricks:

  • Use Cream of Mushroom Soup: If you prefer to use cream of mushroom soup instead of making your own creamy sauce, simply swap out the gluten-free flour, almond milk, dairy-free butter and tamari sauce for 1 cup of homemade cream of mushroom soup or a store-bought version.
  • Make Homemade Fried Onions: For the crispy onion topping, you can use storebought fried onions, but here’s how you can make your own homemade crispy onions!
  • Prepare Ahead: You can prepare this gluten-free dairy-free green bean casserole 1 or 2 days before Thanksgiving day, then warm it up in the oven until the topping is crispy again before serving it at your holiday table.
  • Use Potato Chips for Topping: For a different twist, you can also use crushed potato chips for the topping instead of crispy onions.

Recipe FAQs:

How to Store Green Bean Casserole

To store any leftover green bean casserole, cover the casserole dish with plastic wrap, or place the casserole in an airtight container and store in the refrigerator for up to 5 days. Reheat in the oven or microwave until warm before serving.

Can I Freeze This Casserole?

Yes you can! To freeze, place the green bean bake in a freezer-safe container and store in the freezer for up to 2 months. Let the casserole thaw completely overnight in the fridge before reheating in the oven or microwave until warm before serving.

Top down view of a plate of gluten-free green bean bake.

Other Favorite Side Dishes for the Holidays:

Gluten-Free Thanksgiving Recipes:

P.S. If you try this recipe, I’d love for you to leave a star rating below, and/or a review in the comment section further down the page. I always appreciate your feedback. Be sure to check out my entire Recipe Index for all the recipes on the blog. You can also follow me on Pinterest, Facebook or Instagram! Sign up for my Email List to get fresh recipes in your inbox each week!

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Gluten-Free Green Bean Casserole (Vegan)


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  • Author: Felicia Lim
  • Total Time: 50 minutes
  • Yield: 6 servings 1x
  • Diet: Gluten Free

Description

Flavorful and tasty, this gluten-free green bean casserole is a classic American side dish that you must have at your Thanksgiving table! Totally dairy-free and vegan too, but no one would care!


Ingredients

Units Scale

Instructions

  1. Preheat Oven: Preheat the oven to 370F.
  2. Cook Butter with Flour: In a medium saucepan, melt the dairy-free butter and cook it with the gluten-free all-purpose flour for 2 minutes, stirring well.
  3. Add Milk, Salt and Spices: Pour in the almond milk and gluten-free tamari sauce and stir the sauce with a spatula or whisk to break up all the lumps. Add salt, spices and mix. If the sauce is too thick, add more milk and stir.
  4. Combine Green Beans, Cheese, and Fried Onions: Place green beans, 2/3 cup shredded cheese, and fried onions (reserve 3 tablespoons for later) in a bowl.
  5. Add Sauce and Stir: Add the sauce and stir with a spatula.
  6. Transfer to Baking Dish: Transfer to an approximately 12” x 12” square casserole dish (you can also use a rectangular baking dish). Bake for 25 minutes.
  7. Add Remaining Cheese and Onions: Add the remaining shredded cheese and fried onions on top and bake for another 10 minutes.
  8. Serve and Enjoy: Serve the gluten-free green bean casserole hot and enjoy!

Notes

Gluten-Free Flour: I recommend using a good-quality gluten-free flour all-purpose flour blend that is made up of light flours/starches (such as rice flour, tapioca starch, corn starch or potato starch). I do NOT recommend using a gluten-free flour blend made up of heavier flours (such as garbanzo bean flour).

Butter: I used a dairy-free butter (vegan butter) to keep this recipe vegan. Alternatively, if you are not lactose-intolerant, go ahead and use regular butter instead.

Milk: I used an unsweetened version of my homemade almond milk, but you can also use another non-dairy-milk instead (such as cashew milk, rice milk, oat milk etc). Alternatively, if you are not lactose-intolerant, go ahead and use regular milk or heavy cream if you prefer.

Tamari Sauce: I used gluten-free tamari sauce to keep this recipe gluten-free. Alternatively, you may also use coconut aminos. If you are not Celiac or gluten-intolerant, go ahead and use regular soy sauce instead.

Nutmeg: I like adding a pinch of ground nutmeg to add flavor. Feel free to leave it out if you’re not a fan of nutmeg.

Green Beans: I used fresh green beans, but you can also use frozen green beans if that’s what you have. Just make sure to cut the green beans into equally sized pieces (approximately 1.5 to 2-inches long).

Fried Onions: I used my homemade gluten-free fried onions for this green bean casserole, but you can also use storebought fried onions.

Cheddar Cheese: I used dairy-free cheese to keep this recipe dairy-free. However, if you are not lactose-intolerant, you can also use regular mozzarella cheese or cheddar cheese instead.

Storing: To store, cover the casserole dish with plastic wrap, or place the green bean casserole in an airtight container and store in the refrigerator for up to 5 days. Reheat in the oven or microwave until warm before serving. To freeze, place the green bean casserole in a freezer-safe container and store in the freezer for up to 2 months. Let the casserole thaw completely overnight in the fridge before reheating in the oven or microwave until warm before serving.

  • Prep Time: 5 mins
  • Cook Time: 45 mins
  • Category: Casserole
  • Method: Baking
  • Cuisine: American

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