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Home » Appetizers

Mushroom and Gruyère Crostini

A closeup photo of Tiffany holding a bouquet.
By Tiffany
Modified: Mar 22, 2026 · Published: Apr 14, 2025

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This appetizer recipe of mushroom and gruyère crostini is made with sautéed mushrooms cooked in red wine. They’re served on a crunchy slice of toasted French bread with melted gruyère.

A silver baking sheet with mushroom gruyere crostini topped with fresh parsley.

Ingredients

  • French Baguette
  • Butter
  • Garlic Salt
  • Gruyère Cheese
  • Cremini (Baby Bella) Mushrooms
  • Soy Sauce
  • Red Cooking Wine
  • Thyme

How to Make Mushroom and Gruyère Crostini

  • Preheat the oven to 400℉.
A gray rectangle cutting board with a black knife, bread slices, and a cut loaf of French baguette.
A silver rectangle baking sheet with 19 French baguette slices laying flat in a single layer.
An overhead view of a silver baking sheet with sliced pieces of French bread being brushed with butter. A small clear dish of butter sits next to the pan.
  • Slice the baguette into ½″ slices diagonally. Lay them flat on a baking sheet. Melt 3 tablespoons butter with garlic salt. Brush the tops of the bread slices with garlic-salted butter. Add gruyère cheese to the top of each bread slice.
An overhead view a silver rectangle baking sheet with 19 French baguette slices topped with shredded gruyere. A silver grater and a round white bowl of shredded gruyere cheese are sitting next to the baking sheet.
A silver rectangle baking sheet with 19 baguette slices with melted gruyere cheese on top.
  • Bake the bread slices in the oven for 4-5 minutes until the cheese is melted.
An overhead view of a dark gray cutting board with a black knife and sliced cremini mushrooms in a pile.
A large hexclad skillet with sliced and cooked mushrooms sitting on a black electric stovetop.
  • Melt 3 tablespoons of butter in a large skillet over medium-high heat. Add sliced mushrooms and cook 5-7 minutes until they are tender.
  • Add red wine, soy sauce, and thyme. Stir to coat mushrooms and cook an additional 1-2 minutes.
A silver baking sheet with a silver spoon placing mushrooms on top of baguette slices.
An overhead view of a silver baking sheet with 19 mushroom gruyere crostini.
  • Add sautéed mushrooms on top of the melted cheese on each crostini.

Variations

  • Try different mushrooms in this recipe like shiitake, white button, oyster, or any bunch of wild mushrooms you like.
  • A spreadable cream cheese, mascarpone, or ricotta can replace the gruyère. Jarlsberg is another tasty option.
  • Add different fresh herbs, like oregano, tarragon, or rosemary, instead of thyme.
A closeup of mushroom gruyere crostini on a silver baking sheet.

Make-Ahead

To make the recipe ahead of time, get all of the prep work out of the way.

Slice the bread and mushrooms the day before. Place the bread in an airtight container. Clean and slice the mushrooms, then sauté with the butter, soy sauce, red cooking wine, and thyme. Place them in the fridge.

When you’re ready, let the mushrooms come to room temperature or heat them slightly on the stove or in the microwave.

Butter and garlic salt the bread slices, add the cheese, and bake in the oven. Then top with mushrooms and serve.

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A silver baking sheet with mushroom gruyere crostini topped with fresh parsley.

Mushroom and Gruyère Crostini

Tiffany
This appetizer recipe of mushroom and gruyère crostini is made with sautéed mushrooms cooked in red wine. They're served on a crunchy slice of toasted French bread with melted gruyère.
No ratings yet
Print Recipe Pin Recipe
Prep Time 10 minutes mins
Cook Time 12 minutes mins
Total Time 22 minutes mins
Course Appetizers
Cuisine American
Servings 8 Servings
Calories 290 kcal

Equipment

  • Nordic Ware Baking Sheets
  • Pastry Brush

Ingredients
  

  • 16-20 ounces French Baguette ½" slices
  • 6 tablespoons Butter divided
  • 1 teaspoon Garlic Salt
  • 4 ounces Gruyère Cheese sliced or shredded
  • 8 ounces Cremini (Baby Bella) Mushrooms
  • 1 tablespoon Soy Sauce
  • 1 tablespoon Red Cooking Wine
  • ½ teaspoon Thyme

Instructions
 

  • Preheat the oven to 400℉.
  • Slice the baguette into ½" slices diagonally. Lay them flat on a baking sheet. Melt 3 tablespoons butter with garlic salt. Brush the tops of the bread slices with garlic-salted butter. Add gruyère cheese to the top of each bread slice.
  • Bake the bread slices in the oven for 4-5 minutes until the cheese is melted.
  • Melt 3 tablespoons of butter in a large skillet over medium-high heat. Add sliced mushrooms and cook 5-7 minutes until they are tender. Add red wine, soy sauce, and thyme. Stir to coat mushrooms and cook an additional 1-2 minutes.
  • Add sauteed mushrooms on top of the melted cheese on each crostini.

Nutrition

Calories: 290kcalCarbohydrates: 29gProtein: 11gFat: 15gSaturated Fat: 8gPolyunsaturated Fat: 1gMonounsaturated Fat: 4gTrans Fat: 0.3gCholesterol: 38mgSodium: 937mgPotassium: 219mgFiber: 1gSugar: 3gVitamin A: 403IUVitamin C: 0.2mgCalcium: 212mgIron: 2mg

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A closeup photo of Tiffany holding a bouquet.

Hello! I'm Tiffany.

I'm the recipe developer and food photographer behind Simply Happenings. I'm also a wife, mom to two adventurous little boys, registered nurse, and I live in the great Midwest. I like to feature high-protein recipes, one-pot meals, and delicious recipes you can cook with your favorite household appliances.

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