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Mushroom Soup Au Gratin

  • Author: Mushroom Canada
  • Prep Time: 12 mins.
  • Cook Time: 25 mins.
  • Total Time: 37 minutes
  • Yield: Serves 4
  • Category: Lunch, Dinner, Appetizer, Snack
  • Method: Baked
  • Cuisine: American, Canadian


This looks like French onion soup but has a rich mushroom flavour instead of onion. It is almost a meal itself so just add a salad and dinner is ready.


  • 2 tbsp olive oil
  • 12 oz sliced assorted fresh mushrooms (white, crimini, portabella, shiitake, oyster)
  • 1 small onion, chopped
  • 1 clove garlic, minced
  • 6 cups chicken broth
  • 1 tsp finely grated lemon rind
  • 1/4 tsp Each ground nutmeg and pepper
  • 4 slices French bread (1/2″/2.5 cm thick) toasted
  • 4 oz grated or sliced Swiss cheese
  • 2 tbsp grated Parmesan cheese (optional)


  1. In a large heavy saucepan heat oil over medium-high heat; sauté mushrooms, onions and garlic for about 3-4 minutes or until lightly browned. Add chicken broth, lemon rind, nutmeg and pepper. Bring to a boil; reduce heat and simmer, covered for 20 to 30 minutes.
  2. Ladle soup into 4 deep ovenproof bowls. Float bread on top; sprinkle with Swiss cheese and Parmesan if using. Place under broiler until bubbly and lightly browned.


Variation:  Add ½ cup (125 mL) dry white wine with the chicken broth.

Keywords: French Mushroom Soup, Soup Au Gratin, Mushroom Soup, Rich Mushroom Soup,

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