Creamy Gluten Free Green Bean Casserole Recipe

Why You’ll Love This Recipe

• Made from fresh ingredients for superior flavor
• Creamy sauce with a crisp, crunchy topping
• Homemade mushroom cream sauce — no canned soup
• Extra-crispy topping using gluten-free ingredients
• Perfect for Thanksgiving, Christmas, or any holiday meal

Ingredients You’ll Need

For the Green Bean Mixture

Here are the main components you’ll use to build this classic casserole:

• Green beans: Fresh green beans are best—trimmed and cut into 1-inch pieces. They have a firmer texture and brighter flavor than canned.
• Shallots: Finely chopped shallots add a sweet, mild onion flavor that complements the mushrooms.
• Mushrooms: Cremini (baby bella) mushrooms work beautifully for a deep, earthy taste.
• Gluten-free flour: Use a 1:1 gluten-free baking flour to thicken the sauce and keep the recipe gluten-free.
• Chicken stock: Low-sodium chicken stock (or vegetable stock to make it vegetarian) provides a savory base for the sauce.

For the Topping

• Gluten-free French fried onions: These provide the classic crunchy, savory topping. Use a trusted gluten-free brand or make your own.
• Gluten-free breadcrumbs or panko: Panko-style gluten-free crumbs add extra crispness when mixed with melted butter and French fried onions.

How to Make Gluten-Free Green Bean Casserole

• Preheat the oven to 400°F (200°C). Lightly grease a 9×13 baking dish with cooking spray or oil.

• Combine the topping ingredients (gluten-free panko, melted butter or vegan butter, and the fried onions) in a bowl and set aside.
• Place the trimmed green beans in a large microwave-safe bowl with ½ cup water, cover, and microwave on high for 6–8 minutes until just tender. They will finish cooking in the oven.

• In a large skillet over medium-high heat, melt the butter. Add the shallots and chopped mushrooms and cook 7–10 minutes until the mushrooms release their liquid and begin to soften.
• Add the garlic, salt, pepper, and dried thyme; cook for another minute until fragrant.

• Sprinkle in the gluten-free flour and cook for 2 minutes, stirring constantly to remove the raw flour taste.
• While whisking, slowly pour in the chicken stock and whisk until the sauce is smooth and combined.

• Stir in the milk and heavy cream (or dairy-free alternatives) and bring the mixture to a gentle simmer. Cook about 5 minutes until thickened, then taste and adjust seasoning with salt and pepper.

• Drain the steamed green beans and transfer them to the prepared baking dish. Pour the mushroom cream sauce over the green beans and toss gently to combine.

• Bake the casserole for 20–25 minutes, until the green beans are mostly tender. Remove from the oven, evenly sprinkle the prepared topping over the casserole, and bake another 5–10 minutes until the topping is golden and the casserole is bubbly.
• Let the casserole rest about 10 minutes before serving. Enjoy warm.

Storage & Make-Ahead Instructions

To make ahead: Prepare the mushroom sauce and steam the green beans. Store both separately in the refrigerator. Reheat the sauce gently, combine with green beans, top, and bake when ready to serve.

To store: Keep leftovers in an airtight container in the refrigerator for up to five days. Reheat in a 350°F oven until warmed through to maintain the topping crispness.

Expert Tips & Tricks

• Dairy-free option: Use coconut cream or a plant-based heavy cream substitute with vegan butter and unsweetened almond or cashew milk. Swap chicken stock for vegetable stock for a vegetarian dish.
• Make your own fried onions: Slice onions thinly, dust in gluten-free flour, and fry until crisp for a fresher, more flavorful topping.
• Choose quality gluten-free products: Use a reliable gluten-free panko and gluten-free fried onions to ensure the topping is crisp and safe for those with gluten intolerance.