French Onion Soup

There’s something deeply comforting about a pot of French onion soup slowly simmering on the stove. It’s a recipe built on patience—simple onions, gently caramelized until they turn rich and golden, filling the kitchen with that unmistakable, cozy aroma. This gluten-free French onion soup keeps all the classic flavors you love: a savory broth, a splash of vermouth for depth, and a cheesy toast melting into the bowl. It’s humble, timeless, and perfect for cold evenings when you want something warm, familiar, and nourishing.

Print Recipe

French Onion Soup

Servings: 6 Servings

Author: Rose Thicket Farms

Ingredients

• 2 pounds yellow onions halved and sliced
• 3 Tbs butter
• 1 Tbs olive oil
• 1 tsp salt
• 1/4 tsp sugar
• 3 Tbs gluten-free flour
• 1/2 cup Vermouth
• 2 (32 oz) containers beef stock
• slices of gluten-free bread*
• sliced provolone cheese

Instructions

• In a medium size Dutch oven over medium-low heat, melt the butter and oil. Stir in the sliced onions. Cover and cook for 30 minutes, stirring occasionally.
• Remove the lid, increase the heat to medium. Stir in the salt and sugar. Cook for 30-40 minutes until the onions are golden brown. Stir frequently to keep the onions from burning.
• Sprinkle the gluten-free flour over the onions and stir until combined. Pour in the Vermouth and continue to stir until the liquid reduces. This step is very fast. Pour in about 1 cup of beef stock and stir into the onion mixture. Continue to stir using the beef stock to loosen the flour mixture. As you stir, you’ll incorporate the flour into the liquid to avoid clumps. Once thoroughly incorporated, pour in the remaining beef stock and stir.
• Bring to a boil and reduce the heat. Simmer for 30 minutes.
• Preheat the oven to broil. Place the slices of gluten-free bread on a baking sheet. Top each slice of bread with provolone cheese. Heat for 2-3 minutes until the cheese is melted and bubbly.
• Remove from the oven and serve.

Notes

Be sure to read labels to ensure it’s gluten-free. 

The Schar Gluten-Free Sourdough Bread works well for this recipe.

 

If you are not gluten-free, you may substitute regular flour and  bread in this recipe. 

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Serve this French onion soup hot, topped with bubbly provolone and crisp gluten-free bread, and enjoy every spoonful. It’s the kind of meal meant to be savored slowly—simple ingredients transformed into something truly special. If you’re planning a comforting, classic dinner, this soup pairs beautifully with my Classic Roasted Chicken for a timeless, from-scratch meal everyone will love. You can find that recipe here. Together, they make a cozy, no-rush dinner that feels both familiar and a little bit special.

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