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4.58 from 7 votes

French Onion Soup Stuffed Mushrooms

French Onion Soup Stuffed Mushrooms - french onion soup in a mushroom! What could be better?
Prep Time30 mins
Cook Time15 mins
Total Time45 mins
Course: Appetizer
Cuisine: French
Keyword: stuffed mushrooms
Servings: 6
Calories: 137kcal
Author: Joanna Cismaru


For the filling

  • 2 tbsp butter unsalted
  • 2 onions sliced
  • 24 mushroom stems
  • 1 tsp Worcestershire sauce
  • 1/4 cup white wine
  • 1/2 cup Gruyere cheese
  • 1/4 tsp salt or to taste
  • 1/4 tsp pepper or to taste

Stuffed Mushrooms

  • 24 cremini mushrooms stems removed (needed for filling)
  • 1 tbsp butter unsalted
  • 1 tbsp chives chopped


  • Preheat oven to 325 F degrees.
  • In a skillet add 2 tablespoons of butter and melt it over medium heat.
  • After the butter has melted, add the sliced onions. Now you have to cook the onions for about 20 minutes.
  • To the onions, add the chopped mushroom stems.
  • Add some salt and pepper, the white wine and the Worcestershire sauce. You'll now need to let it cook for another 5 minutes or so, so that the liquid cooks down.
  • In another large skillet that is oven proof, melt a little bit more butter, about a tablespoon and add the mushrooms. You can sprinkle some salt and pepper over them. 
  • Cook them for a couple minutes on each side. Spoon the onion filling in each mushrooms, about a tablespoon in each.
  • Top each mushroom with Gruyere cheese.
  • Bake the mushrooms for about 10 to 15 minutes at 325 F degrees or until the cheese has melted nicely and is golden brown.


Please keep in mind that nutritional information is a rough estimate and can vary greatly based on products used.


Serving: 4mushrooms | Calories: 137kcal | Carbohydrates: 7g | Protein: 5g | Fat: 9g | Saturated Fat: 5g | Cholesterol: 27mg | Sodium: 151mg | Potassium: 435mg | Fiber: 1g | Sugar: 3g | Vitamin A: 305IU | Vitamin C: 3mg | Calcium: 134mg | Iron: 0.5mg