Gluten-Free Green Bean Casserole

When it comes to holiday side dishes, this gluten-free green bean casserole is a game-changer. The oven does all the heavy lifting in this Test Kitchen-approved recipe, transforming simple ingredients into a bubbling, savory golden-brown casserole that feeds a crowd. Not only is it ready in under an hour, but it combines the classic flavors of crisp green beans with creamy mushroom sauce and a crunchy gluten-free topping, proving that dietary restrictions don’t mean sacrificing tradition or taste.

Gluten-Free Green Bean Casserole Ingredients

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• Green beans: Fresh green beans are blanched until crisp-tender, giving the casserole a bright and fresh taste.
• Gluten-free condensed cream of mushroom soup: Two cans of gluten-free cream of mushroom soup form the creamy base of the casserole.
• Whole milk: Milk adds a characteristic richness and creaminess to the sauce. It also helps to thin out the condensed soup.
• Tamari: A gluten-free alternative to traditional soy sauce, tamari enhances the casserole’s savory flavor.
• Gluten-free panko bread crumbs: Mixed with butter and Parmesan, these flavorful bread crumbs give the casserole a crispy and golden topping.
• Parmesan cheese: Grated Parmesan adds an extra layer of savory flavor to the breadcrumb topping.
• Butter: Melted butter binds the bread crumbs and cheese, helping to create that deliciously crispy topping.
• Gluten-free french-fried onions: A classic topping for green bean casserole, these add crunch and flavor to every bite.

Directions

Step 1: Prep the green beans

Jonathan Melendez for Taste of Home

Preheat the oven to 350°F. In a large saucepan, bring water to a boil. Add trimmed green beans and cook uncovered until crisp-tender, about three minutes. Drain immediately and set aside.

Step 2: Make the sauce

Jonathan Melendez for Taste of Home

In a large bowl, whisk together the gluten-free condensed cream of mushroom soup, whole milk, tamari soy sauce, salt and pepper. Gently stir in the blanched green beans, making sure they’re evenly coated.

Step 3: Make the topping

Jonathan Melendez for Taste of Home

In a small bowl, combine the gluten-free panko bread crumbs, grated Parmesan cheese and melted butter. Mix well.

Step 4: Assemble the casserole

Jonathan Melendez for Taste of Home

Grease a 13×9-inch baking dish and spoon the green bean mixture into the dish, spreading it out evenly. Spoon the bread crumb mixture over the green beans and sprinkle with gluten-free french-fried onions.

Step 5: Bake the casserole

Jonathan Melendez for Taste of Home

Bake the casserole for 25 to 30 minutes or until the top is golden brown and crispy.

Editor’s Tip: If the topping starts to brown too quickly, loosely cover the dish with aluminum foil for the remainder of the baking time.

Jonathan Melendez for Taste of Home

Gluten-Free Green Bean Casserole Variations

• Make it vegan: Try a plant-based version of this casserole by using dairy-free milk, vegan butter and gluten-free vegan cream of mushroom soup. Follow our vegan green bean casserole for a complete recipe.
• Add some mushrooms: Saute fresh mushrooms with the onions and garlic to give this gluten-free green bean casserole an dose of umami goodness.
• Use different cheese: Swap out Parmesan for shredded cheddar or Gruyere for a richer, cheesier topping to this casserole.
• Add some bacon: Crumble six slices of cooked bacon and sprinkle with the french-fried onions to give your gluten-free green bean casserole an even crunchier finish.

How to Store Gluten-Free Green Bean Casserole

Allow the casserole to cool completely before dividing it into smaller portions and transferring the portioned leftovers to airtight containers. This green bean gluten-free casserole will stay fresh in the fridge for up to three days.

Can you freeze gluten-free green bean casserole?

Yes, you can freeze this casserole! After baking, let it cool completely before covering tightly with plastic wrap and aluminum foil. Freeze for up to two months. When ready to serve, thaw overnight in the refrigerator before reheating.

Can you make gluten-free green bean casserole ahead of time?

Absolutely! You can assemble this gluten-free green-bean casserole up to 24 hours in advance. Keep it covered in the fridge, then add the toppings just before baking. You may need to add 5 to 10 minutes to the baking time if starting from cold.

Gluten-Free Green Bean Casserole Tips

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How do I keep green bean casserole from becoming soggy?

To prevent mushy green beans and a soggy casserole, make sure to blanch the fresh beans just until crisp-tender. They should still have a slight crunch and will continue to cook in the oven.

Can you use canned or frozen green beans in gluten-free green bean casserole?

While fresh green beans provide the best texture, you can use frozen green beans in a pinch. Thaw and drain them well before adding to the dish. We donʻt recommend using canned green beans as they tend to be too soft for this recipe.

What’s the best gluten-free substitute for cream of mushroom soup?

If you can’t find gluten-free cream of mushroom soup at the store, you can easily make your own batch of cream of mushroom soup—just make sure to use gluten-free flour when making the roux.

How do I make sure my gluten-free green bean casserole topping is extra crispy?

For an even crunchier topping to your casserole, toast the panko bread crumbs lightly in a skillet with butter before mixing with Parmesan and adding on top.