Green Bean Casserole (Gluten Free)

This gluten free Green Bean Casserole Thanksgiving side dish recipe is made from scratch with fresh green beans and cream of mushroom soup!

My recipe for Gluten Free Green Bean Casserole first appeared on Sunday Supper Movement where I am a contributor.

I know that Green Bean Casserole tends to be at the top of everyone's favorite Thanksgiving side dish list but until recently I never really understood all the fuss.

Given the choice between Buttermilk Mashed Potatoes topped with gravy and a pan of green bean casserole I would the choose the potatoes every time.

All of that changed once I tried this classic Thanksgiving side dish made entirely from scratch. Fresh ingredients like green beans and mushrooms along with a homemade cream of mushroom soup makes ALL the difference.

Does choosing to go the scratch-made route mean more work and energy for you? Yes. Is it worth it? Yes.

I am now convinced that no Thanksgiving or holiday menu is complete without a batch of this casserole.

The added bonus of this recipe is that its entirely gluten free. It's the perfect side to serve to your gluten free guests. And your gluten-eating guests will never know the difference. I promise.

Jump to:

• Homemade Green Bean Casserole Ingredients
• How To Blanch Green Beans
• How To Make Green Bean Casserole From Scratch
• How To Make Cream Of Mushroom Soup
• How Long Does It Take To Bake This Casserole?
• How To Make The Crunchy Topping
• Can This Casserole Be Made Ahead Of Time?
• Can Green Bean Casserole Be Frozen?
• What To Serve With Green Bean Casserole
• Green Bean Casserole (Gluten Free)

Homemade Green Bean Casserole Ingredients

I know that the holidays are stressful and I know how tempting it is to make our lives easier by using shortcut ingredients like canned soups and vegetables.

However, fresh ones taste SO much better and result in a final dish that's much lower in sodium and contains no mystery ingredients.

Here's What You'll Need:

• 2 lbs. Fresh Green Beans
• 2 Shallots
• 4 Cloves Garlic
• 2 8 oz. Packages Button Mushrooms
• 1 Tbsp. Olive Oil
• 4 Tbsp. Butter
• 3 Tbsp. Gluten Free Flour Blend (I love Bob's Red Mill 1 to 1 Flour) (or regular AP flour if not gluten free)
• 1 Cup Gluten Free Low-Sodium Chicken Broth
• ½ Cup Evaporated Milk
• ½ tsp. Garlic Powder
• 1 tsp. Worcestershire Sauce
• ½ tsp. Kosher Salt and Pepper
• 1 Cup Gluten Free French Fried Onions (or regular French fried onions if not gluten free)

How To Blanch Green Beans

The first step is to blanch the green beans. Blanching the green beans simply means to cook them for a short period of time in boiling water and then to transfer them to an ice bath.

This allows them to cook for a short amount of time but still retain their crispy texture and bright color. The beans will bake evenly in the casserole and will not become mushy as they bake.

1. Wash and trim 2 lbs. of fresh green beans. Cut the beans into halves or thirds. Bring a pot of water to a boil. Once the water is boiling, add the green beans and boil for 3 minutes. After 3 minutes, remove the beans with a slotted spoon or spider strainer and place them into a bowl of ice water.
2. After the beans have cooled in the ice water, place them in a strainer and drain them. Once drained, place the beans in a 9×13 inch casserole dish.

How To Make Green Bean Casserole From Scratch

1. The next step is to saute 1 package of the mushrooms in a skillet.
2. Mince 2 shallots and 4 cloves of garlic.
3. Cut 1 8 oz. package of button mushrooms into slices.
4. Heat a skillet to medium and add 1 Tbsp. of butter. Once the butter melts, add the garlic and shallots. Saute for 2-3 minutes, stirring often.
5. Add the sliced mushrooms along with a generous pinch of salt and pepper. Saute the mushrooms for 8 minutes, stirring often.
6. After sauteing the mushrooms, add them to the green beans in the casserole dish.

Love mushrooms? Check out these recipes!

• Garlicky Mushroom and Shrimp Risotto
• Roasted Mushroom Tapenade
• Mushroom Olive Pasta
• Steak Diane with Mushrooms
• Air Fried Breaded Mushrooms
• Spaghetti with Turkey Meatballs and Mushrooms
• Spinach Artichoke Stuffed Mushrooms
• Mushroom Gruyere Mini Tarts
• Tater Tot Hotdish From Scratch
• Roasted Mushroom Black Bean Burgers

How To Make Cream Of Mushroom Soup

If you’ve never tried homemade cream of mushroom soup then you are in for a treat!

I’ve never cared much for canned cream of mushroom soup but I could eat this homemade version on its own – It’s THAT good. And it only takes about 10-15 minutes to whip up.

1. Cut another 8 oz. package of button mushrooms into small pieces. You want these mushrooms to be cut smaller than the mushrooms you sliced earlier.
2. Once the mushrooms are chopped, heat another Tbsp. of butter in a skillet. Add the chopped mushrooms along with a pinch of salt and pepper. Saute for 5-6 minutes, stirring often. When the mushrooms have cooked down, pour them into a small bowl and set aside.
3. Reduce heat to medium-low and add 2 more Tbsp. of butter to the skillet. Once the butter is melted add 3 Tbsp. of gluten free flour blend. Stir the flour into the melted butter, creating a roux.
4. Slowly add 1 cup of chicken broth to the skillet and stir constantly using a whisk. The mixture will look chunky at this point. Add ½ cup of evaporated milk and continue to stir.
5. Add ½ tsp. garlic powder, 1 tsp. Worcestershire sauce, and ¼ tsp. salt and pepper to the skillet. Continue to stir until the mixture becomes creamy and thickened.

How Long Does It Take To Bake This Casserole?

1. Once the homemade cream of mushroom soup is ready, pour it into the casserole dish along with the green beans and mushrooms. Stir all of the ingredients together until completely coated.
2. Place the uncovered baking dish into an oven that has been heated to 375 degrees. Bake for 25 minutes.

How To Make The Crunchy Topping

Top the casserole with 1 cup of Gluten Free French Fried Onions. You may be able to find them at your local grocery store (I am able to find them at Aldi during the holiday season) or on Amazon.

Feel free to use regular French Fried Onions if not gluten free.

If you can't find them simply combine 1 cup of Gluten Free Panko Breadcrumbs and 2 Tbsp. of melted butter.

1. After 25 minutes, pour the breadcrumbs OR gluten free French fried onions over the top of the casserole. Bake for an additional 10 minutes.
2. After 35 minutes the casserole should be hot and bubbly. Remove from the oven and allow to cool slightly before serving.

Can This Casserole Be Made Ahead Of Time?

Yes! To help save some time you can make it a day or two in advance or the night before.

Simply prepare this recipe as directed without baking it. Do not add the breadcrumbs or French onions to the top until the baking process. Cover the unbaked casserole with tinfoil and place in the fridge for 1-2 days before baking and then bake as directed.

Can Green Bean Casserole Be Frozen?

I would not recommend freezing this casserole as it contains dairy. Dairy tends to separate when frozen and the ingredients will likely get mushy. It’s best to enjoy this casserole within a few days of cooking!

Leftovers can be kept in the fridge 4-5 days after cooking stored in an airtight container.

What To Serve With Green Bean Casserole

This Homemade Green Bean Casserole is classic Thanksgiving fare and pairs perfectly with all of the holiday favorites. I love to serve it alongside stuffing like this Wild Rice and Fennel Stuffing, Cheesy Au Gratin Potatoes, or Fennel Herb Stuffing.

Other great pairings include these Maple Mustard Brussels Sprouts, Savory Mashed Sweet Potatoes, Kohlrabi Mash, and Sweet and Spicy Roasted Brussels Sprouts.

If you're looking for a Thanksgiving dessert you can't go wrong with this Old Fashioned Apple Pie, Maple Bourbon Pecan Pie, Pumpkin Bread Pudding, or Cast Iron Skillet Apple Crisp!

I am happy that this classic comforting savory side dish has now made it to the top of my Thanksgiving side dish list and I think it will be at the top of yours as well.

Can I Make This Recipe Even If I'm Not Gluten Free?

Absolutely!

Simply use AP flour in place of the gluten free flour blend and regular French Fried Onions in place of the gluten free version.

Love green beans? Check out these recipes!

• Garlic Roasted Green Beans
• Marinated Green Bean Salad
• Sheet Pan Italian Chicken and Green Beans
• One Pan Chicken Sausage and Green Beans

Looking For More Thanksgiving Side Dishes? Don't Miss These!

Sweet Potato Casserole With Marshmallows and Pecans

Jalapeno Spicy Cornbread Dressing

Crock Pot Stuffing

Easy Creamed Corn Recipe

Creamy Garlic Roasted Parsnip Puree