Golden Topped Gluten Free Green Bean Casserole

Discover the Magic of This Healthy Gluten-Free Green Bean Casserole

Green bean casserole has long held its place as a quintessential holiday side dish for undeniably good reasons. There’s something truly irresistible about crisp-tender green beans enveloped in a lusciously creamy, earthy mushroom sauce, all generously topped with a golden layer of crispy fried onions. It’s the very definition of comfort food, evoking warm memories and festive gatherings. However, for those navigating dietary restrictions or simply seeking a healthier approach, the traditional version can present challenges. My mission is to ensure everyone can savor these delicious holiday dishes without any post-meal discomfort.

This recipe is a shining example of how effortlessly healthy, low-carb, and allergen-friendly alternatives can be. By making a few thoughtful adjustments, we transform this classic into a gluten-free and dairy-free masterpiece that sacrifices none of its comforting appeal. It’s naturally lower in carbohydrates compared to its conventional counterparts, free from common allergens like gluten and dairy, and crafted with whole, nourishing ingredients. This means it’s not only safe for guests with specific dietary needs but also a delightful crowd-pleaser for everyone around your holiday table.

For me, traditional green bean casserole, typically made with ingredients like Campbell’s Cream of Mushroom Soup, became a dish I had to forgo after adopting a gluten-free and dairy-free lifestyle. Those canned soups often contain undesirable ingredients such as canola oil, soy, wheat, corn starch, and MSG. Driven by a desire to reclaim my cherished Thanksgiving side, I meticulously developed this healthy, wholesome, and incredibly flavorful gluten-free green bean casserole. It delivers the same hearty taste and texture without any unwanted additives, ensuring every bite is pure, guilt-free comfort. Get ready for this incredible recipe to become a new, indispensable addition to your annual holiday cooking repertoire!

While some low-carb green bean casserole recipes might incorporate ingredients like crushed pork rinds or cream cheese for texture and richness, this particular version embraces a different path. We utilize readily available store-bought gluten-free crispy fried onions (with an option for homemade, which we’ll explore below!) and rely on carefully selected dairy-free substitutes to achieve that signature creamy texture. This approach ensures maximum flavor and satisfaction while adhering to gluten-free and dairy-free guidelines, making it suitable for a wide range of dietary preferences, including Whole30 (with a small modification) and Keto lifestyles.

Step 1: Prepare the Green Beans & Oven

Begin by preheating your oven to 375°F (190°C). Lightly grease a 9×13 inch casserole dish, ensuring it’s ready for baking. Next, fill a large pot with water and bring it to a rolling boil over high heat. Once boiling, carefully add the trimmed fresh green beans. Blanch them for precisely 5 minutes, or until they achieve a vibrant green color and are crisp-tender. This means they should still have a slight bite to them. Promptly drain the green beans in a colander and set them aside. This par-cooking step ensures the green beans are perfectly cooked, not mushy, in the final casserole.

Step 2: Sauté the Aromatics and Mushrooms

In a large skillet, melt 1 tablespoon of ghee (or vegan butter for a strict dairy-free version) over medium heat. Once shimmering, add the diced onion, minced garlic, and sliced cremini mushrooms to the skillet. Season lightly with a pinch of salt and black pepper. Sauté these ingredients, stirring occasionally, for 7-8 minutes. The goal is for the mushrooms to release their liquid and become tender and slightly browned, and the onions to soften and become translucent. This step builds the savory foundation of your sauce.

Step 3: Build the Sauce Base

If you’re using Sherry cooking wine, now is the time to add it to the skillet. Pour it in and use a wooden spoon or spatula to scrape up any delicious brown bits that have formed on the bottom of the pan. This deglazing step adds immense flavor. Next, stir in the chicken broth, dried thyme, and sea salt. Bring the mixture to a gentle boil, then reduce the heat to medium-low and let it simmer. This allows the flavors to meld beautifully while you prepare the creamy coconut cashew component.

Step 4: Create the Coconut Cashew Cream

In a high-speed blender, combine the full-fat canned coconut milk (remember to stir it well in the can before measuring), raw unsalted cashews, fresh lemon juice, and ½ cup of water. Blend on high for a full minute, or until the mixture is incredibly smooth, thick, and creamy. Ensure there are no grainy cashew pieces remaining; a truly smooth blend is key to a velvety sauce. This dairy-free cream provides the luscious body for your casserole.

Step 5: Thicken the Mushroom Sauce

Pour the freshly blended coconut cashew cream into the simmering mushroom mixture in the skillet. Stir continuously for 1-2 minutes. You’ll notice the sauce will begin to thicken quite rapidly, developing a rich, creamy consistency. Taste the sauce and adjust seasonings as needed, adding more salt if desired. At this point, you can choose to leave the mushroom pieces whole for a chunky sauce, or use an immersion blender to gently break down some of the mushrooms for a smoother, more uniform texture. The choice is entirely yours, depending on your preference!

Step 6: Assemble the Casserole

Transfer the blanched green beans into your prepared 9×13 inch casserole dish. Evenly pour the warm, creamy mushroom sauce over the green beans. Gently stir the mixture to ensure the green beans are thoroughly coated with the delicious sauce. This ensures every bite is flavorful.

Step 7: Initial Bake

Place the assembled casserole into the preheated oven and bake for 20 minutes. During this initial baking period, the flavors will meld, and the casserole will heat through beautifully, preparing it for its crispy topping.

Step 8: Add Onions & Final Bake

Once the 20-minute timer for the casserole goes off, carefully remove it from the oven. Evenly sprinkle your crispy fried onions (either store-bought gluten-free or your homemade version, see below) over the top of the casserole. Return the dish to the oven and bake for an additional 10 minutes, or until the onions are golden brown and wonderfully crisp. Keep a close eye on them to prevent burning. Serve your piping hot, irresistible Gluten-Free Green Bean Casserole immediately and savor every comforting bite!

Homemade Crispy Fried Onions: The Perfect Topping

While store-bought gluten-free crispy onions offer a convenient shortcut, crafting your own homemade version elevates this casserole to an entirely new level. They’re undeniably delicious and add an unparalleled freshness. Here’s how to make them:

Step 1: Prepare the Onion & Coatings

Take one large onion, slice it in half, and then cut it into 2-3 inch pieces, separating the rings or strips. In a shallow dish, whisk two eggs until well beaten. In a separate shallow dish, combine 2 tablespoons of tapioca flour, ¼ cup of coconut flour (or fine almond flour), 1 teaspoon of garlic powder, ½ teaspoon of sea salt, and ½ teaspoon of paprika. Stir these dry ingredients together until thoroughly combined.

Step 2: Heat the Frying Oil

In a large, heavy-bottomed skillet, heat 2 tablespoons of ghee and 2 tablespoons of avocado oil (or coconut oil) over medium heat. You want enough oil to moderately cover the onions for frying. Test the oil by dropping a tiny pinch of flour in; if it sizzles, it’s ready.

Step 3: Coat the Onions

Dip each onion piece first into the beaten egg, allowing any excess to drip off. Then, transfer it to the flour mixture, ensuring it’s completely coated. Gently shake off any extra flour.

Step 4: Fry to Golden Perfection

Carefully place the coated onion pieces into the hot oil in a single layer, making sure not to overcrowd the pan. Fry them for 2-4 minutes on each side, or until they achieve a beautiful golden-brown color and are wonderfully crisp. Frying in batches ensures even cooking and prevents the oil temperature from dropping too much.

Step 5: Drain Excess Oil

Once fried to your liking, use a slotted spoon to transfer the crispy fried onions to a plate lined with paper towels. This helps to drain any excess oil, ensuring they remain perfectly crisp. Continue working in batches until all onion pieces are fried.

Expert Tips & Variations for Your Gluten-Free Green Bean Casserole

• Quality Ingredients Matter: For the best flavor, use fresh, high-quality green beans and mushrooms. Organic full-fat coconut milk and raw cashews will yield the creamiest, richest sauce.
• Thrive Market Savings: If you’re new to the Keto or Paleo lifestyle or looking to stock up on these specific pantry staples, Thrive Market is an excellent resource. They offer healthier, often organic, items at prices lower than traditional retail. You can often find deals like 30% off your first order through special links, making it a great way to source ingredients like full-fat coconut milk, cashews, and various flours.
• Dairy-Friendly Alternative: If dairy isn’t an issue for you, or if you simply prefer it, feel free to substitute the coconut milk and cashews in the mushroom sauce with an equal amount of heavy cream. You can also use traditional butter instead of ghee for sautéing the aromatics. This will result in a more classic, albeit not dairy-free, flavor profile.
• Store-Bought Crispy Onions for Convenience: If time is a constraint, don’t hesitate to use store-bought fried onions. Just be sure to check the labels carefully to ensure they are certified gluten-free. Many brands now offer excellent GF options. Look for the 365 brand Gluten-Free Crispy Onions at Whole Foods or check your local Aldi, as they often carry a great gluten-free version. These convenient options are exactly what I used for the photos in this post!
• Spice it Up: Feel free to experiment with additional spices in your mushroom sauce. A pinch of nutmeg can add warmth, or a dash of cayenne pepper for a subtle kick. Smoked paprika can also add a delightful smoky depth.
• Veggie Boost: To add more nutrients and texture, consider incorporating other vegetables. Sliced carrots or celery can be sautéed with the onions and mushrooms.
• Nut-Free Option (Experimental): While not extensively tested, for a nut-free version, you could try using all coconut milk for the cream base and thickening the sauce with a slurry of arrowroot powder mixed with water. Start with 1 tablespoon of arrowroot mixed with 3 tablespoons of cold water, then add a little at a time to the simmering sauce until it reaches your desired thickness.

Make-Ahead & Storage Solutions for Stress-Free Holiday Meals

Preparing holiday meals can be a juggling act, but this Gluten-Free Green Bean Casserole is wonderfully accommodating for make-ahead convenience. You can assemble the main components the day before, significantly reducing stress on the big day.

Make-Ahead Instructions: Prepare the green beans and the creamy mushroom sauce as directed in the recipe. Combine them in your casserole dish, cover tightly with foil or an airtight lid, and refrigerate for up to 24 hours. On the day of serving, take the casserole out of the fridge at least 30-60 minutes before baking to allow it to come closer to room temperature. This promotes even heating. Then, proceed with adding the crispy onions and baking as per the instructions.

Storage Tips for Leftovers: Should you have the wonderful fortune of leftovers (though it’s rare with this delicious dish!), store them in an airtight container or a covered casserole dish. They will keep beautifully in the refrigerator for 3-5 days. For longer storage, this casserole freezes exceptionally well! Transfer cooled leftovers to a freezer-safe container, ensuring it’s tightly sealed, and freeze for up to 10-12 months. When you’re ready to enjoy, simply thaw overnight in the refrigerator and reheat gently in the oven or microwave until warmed through. The fried onions might lose a little crunch after freezing and reheating, but the casserole itself remains incredibly tasty.

Frequently Asked Questions About This Gluten-Free Casserole

Here are answers to some common questions you might have when preparing this delicious gluten-free green bean casserole:

Do you have to soak the raw cashews first like in some recipes?

No, you do not need to soak the cashews for this recipe. If you have a high-speed blender, raw cashews will blend into a perfectly smooth cream without pre-soaking. If you have a less powerful blender and are concerned about smoothness, you can soak them in hot water for 30 minutes, then drain and rinse before blending.

Is there a way to make this green bean casserole nut-free?

I haven’t extensively tested a completely nut-free version myself, but you could try substituting the cashews with additional full-fat coconut milk to maintain creaminess. To achieve the desired thickness, you might need to use an arrowroot powder slurry: mix 1 tablespoon of arrowroot powder with 3 tablespoons of cold water, then gradually stir this into the simmering mushroom sauce until it thickens to your liking. Start with a small amount and add more as needed.

Can I use frozen green beans instead of fresh?

Yes, absolutely! If using frozen green beans, make sure to thaw them completely before blanching for 5 minutes as directed. This ensures they cook evenly and retain their crisp-tender texture. Avoid adding them directly from frozen, as this can make the casserole watery.

What if I can’t find cremini mushrooms?

If cremini mushrooms are unavailable, you can substitute them with white button mushrooms for a milder flavor, or a mix of wild mushrooms (like shiitake or oyster mushrooms) for an even deeper, more gourmet taste. The key is to use fresh mushrooms for the best texture and flavor in the sauce.

More Irresistible Gluten-Free Holiday Recipes

• Creamy Dairy Free Mashed Potatoes
• Bacon Maple Brussels Sprouts with Pecans and Cranberries
• Gluten Free Dairy Free Sausage Apple Herb Stuffing
• Gluten-Free Pumpkin Pie
• Paleo Roasted Turkey

Rated 4.83 out of 5 from 17 votes

Easy Gluten-Free Green Bean Casserole (with Fried Onions)

By: Mary Smith

Prep: 15 mins

Cook: 45 mins

Total: 1 hr

Yield: 8 people

This homemade gluten-free green bean casserole recipe features fresh green beans baked in a creamy, dairy-free mushroom sauce, topped with store-bought or homemade crispy onions. A healthy twist on a classic holiday favorite!

This post may contain affiliate links

This recipe was originally published on November 4, 2021 and updated with new copy on August 21, 2024 and new photos on August 26, 2024.