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Creamy French Onion and Mushroom Soup

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  • Author: Evelyn
  • Prep Time: 15 minutes
  • Cook Time: 45 minutes
  • Total Time: 1 hour
  • Yield: 6 servings
  • Category: Soup
  • Method: Stovetop + Broil
  • Cuisine: French / Comfort
  • Diet: Vegetarian

Description

A rich, cozy soup blending caramelized onions, mushrooms, herbs, and cream, topped with cheese‑toasted bread.


Ingredients

  • 6 tablespoons salted butter
  • 4 medium yellow onions, thinly sliced
  • 1 1/4 cups dry white wine (e.g. Pinot Grigio or Sauvignon Blanc)
  • 3 cloves garlic, minced or grated
  • 2 cups cremini or wild mushrooms, sliced
  • 2 tablespoons fresh thyme leaves
  • 2 tablespoons chopped fresh sage
  • 1 teaspoon honey
  • 68 cups low sodium chicken or vegetable broth
  • 2 teaspoons Worcestershire sauce (or soy sauce)
  • 2 bay leaves
  • Kosher salt and black pepper (to taste)
  • 1/2 cup heavy cream
  • 6 slices French bread
  • 2 cups shredded Gruyère cheese

Instructions

  1. Melt together the butter, onions, and honey in a large Dutch oven over medium‑high heat. Cook, stirring occasionally until softened, about 10 minutes. Then slowly add ¾ cup of the wine (¼ cup at a time), letting it cook into the onions, and continue cooking another 10–15 minutes until the onions are deeply caramelized.
  2. Add the garlic, mushrooms, thyme, and sage. Season with salt and pepper, cook another 3–4 minutes. Then add the remaining ½ cup wine, the broth, Worcestershire sauce, bay leaves, and a pinch of salt and pepper. Increase heat to medium‑high and bring to a simmer. Simmer 10 minutes, then stir in the cream and cook another 5–10 minutes. Remove and discard the bay leaves. Taste and adjust seasoning.
  3. Preheat the oven to 400 °F (about 200 °C). Arrange the bread slices on a baking sheet and toast for 10–15 minutes until very dry. Then switch the oven to broil.
  4. Ladle the soup into oven‑safe bowls. Place a slice of toasted bread on each, then top evenly with cheese. Place each bowl on a baking sheet and broil until the cheese is bubbly and golden, 3–5 minutes. Garnish with fresh thyme and serve immediately.

Notes

  • If you prefer not to use wine, substitute about ½ cup apple cider or apple juice for the first step, and use broth for the rest.
  • Use vegetable broth to make this soup vegetarian.
  • Watch the broiler closely — cheese melts fast and can burn.
  • You may toast the cheese on the bread separately if you don’t have oven‑safe bowls, then place the cheesy bread atop the soup.
  • The onion caramelization is critical for deep flavor — be patient with that step.

Nutrition

  • Calories: 630 kcal