Bistro-Style Gluten-Free French Onion Soup (Easy)

Learn how to make a restaurant-worthy gluten-free french onion soup with my easy no-fail recipe. Don't let the simple list of ingredients fool you. This homemade, classic soup is bursting with rich, robust flavor, despite using only basic kitchen staples. It all starts with my method for golden brown, caramelized onions that are never dry or burnt!

Prep Time 10

Cook Time 1

Total Time 1 10

Servings

Author Melissa Erdelac

Ingredients

4 tablespoons unsalted butter
3 pounds Vidalia (sweet) onions about 5 large, halved lengthwise and thinly sliced
1 teaspoon kosher salt
1 teaspoon granulated sugar
½ teaspoon ground black pepper
1 cup dry white wine
1 tablespoon dry sherry
1½ tablespoons gluten-free all-purpose flour or sweet rice flour
6 cups gluten-free beef broth
1 loaf gluten-free french bread
8 ounces gruyere cheese freshly grated

Instructions

In a large dutch oven or saucepan, melt the butter over medium heat. Add the onions, salt, sugar, and pepper. Stir until well coated with butter and seasonings and then cover. Cook for 5 minutes, undisturbed.
4 tablespoons unsalted butter, 3 pounds Vidalia (sweet) onions , 1 teaspoon kosher salt, 1 teaspoon granulated sugar, ½ teaspoon ground black pepper
Uncover and continue to cook until the onions are deeply brown, which will take about 45-50 minutes. Stir occasionally at first, but after about 25 minutes, stir more frequently, about every 5 minutes. There will be browned, sticky bits at the bottom of the pan you'll want to scrape up and work into the onions (gives them flavor and nice browned color). If they become overly browned or dry as they cook, add a dash of water and continue cooking.
Add the wine and sherry. Let it come to a boil and cook for about 2-3 minutes to reduce slightly.
1 cup dry white wine, 1 tablespoon dry sherry
Stir in the flour and then slowly add in the broth. Heat until simmering.
1½ tablespoons gluten-free all-purpose flour , 6 cups gluten-free beef broth
Meanwhile, slice the baguette into 3/4-inch slices and lay on a baking sheet. Position an oven rack in the top-third position and toast the bread for 2 minutes. Flip, and toast the other side for 2 more minutes.
1 loaf gluten-free french bread
Position the oven-safe crocks to the baking sheet and fill with soup. Lay two baguette slices on top and sprinkle generously with cheese. Return pan to the oven to broil, about 2 minutes. Serve immediately.
8 ounces gruyere cheese

Nutrition