This Mushroom Sandwich Melts recipe is a delicious combination of sautéed mushrooms, crispy bacon, and melted cheese, all piled onto toasted French baguette slices. With simple ingredients like onions, garlic, and fresh parsley, this easy-to-make dish is perfect for a quick weeknight dinner, lunch, or an appetizer. Baked until golden and bubbly, each bite offers a rich and savory flavor profile that is sure to please any crowd. Whether you’re cooking for family or hosting guests, this mushroom melt recipe provides a comforting, flavorful option for every occasion.

Ingredients
- 1 medium onion, diced
- 3 garlic cloves, pressed
- 2 Tbsp unsalted butter
- 24 oz (1 1/2 lbs) white mushrooms, diced
- 8 oz bacon, chopped into thin strips
- 2 Tbsp mayonnaise
- 1/4 to 1/2 tsp salt, or to taste
- 1/4 tsp black pepper, or to taste
- 2 1/2 cups (8 oz) Mexican cheese blend, finely shredded
- 1/4 cup fresh chopped parsley, plus more for garnish
- 2 soft French baguettes, sliced into 1/2″ thick toasts
Instructions
- Prep the Oven and Skillet:
Preheat your oven to 350˚F. Line a large baking sheet with parchment paper. In a large non-stick skillet, heat 1 Tbsp of butter over medium heat. Add the diced onion and cook, stirring often, until soft and lightly golden (about 5-7 minutes). Add the pressed garlic and cook for another minute until fragrant. Transfer the onion and garlic to a mixing bowl. - Cook the Mushrooms:
In the same skillet, add another 1 Tbsp of butter and sauté the diced mushrooms over medium-high heat. Cook for 10-12 minutes until the mushrooms release their juices and the liquid evaporates. Transfer the mushrooms to the mixing bowl with the onions and garlic. - Cook the Bacon:
Add the chopped bacon to the skillet and cook until browned and crispy, about 7 minutes. Transfer the bacon to a paper towel-lined plate to drain excess fat, then add it to the mixing bowl with the mushrooms and onions. - Prepare the Filling:
To the mixing bowl, add 2 1/2 cups of shredded cheese, 1/4 cup chopped parsley, 2 Tbsp mayonnaise, 1/4 to 1/2 tsp salt, and 1/4 tsp black pepper. Stir everything together until well combined. - Assemble the Sandwich Melts:
Spoon the mushroom, bacon, and cheese mixture generously onto the toasted baguette slices. Shape and mound the mixture as needed. - Bake:
Place the prepared toasts on a baking sheet and bake at 350˚F for 15 minutes, or until the cheese is melted and bubbly. Garnish with additional fresh parsley before serving.
Why You’ll Love This Recipe
- Rich and Savory: The combination of sautéed mushrooms, crispy bacon, and melted cheese makes every bite full of flavor.
- Perfect for Any Occasion: These mushroom sandwich melts are great for a cozy dinner, an appetizer for gatherings, or a comforting snack.
- Easy to Make: With simple ingredients and easy steps, this dish comes together quickly for a delicious, satisfying meal.

Tips
- Use Fresh Baguettes: Soft, fresh French baguettes hold up best for toasts, giving you a crunchy base with a tender interior.
- Add More Cheese: Feel free to add extra cheese for a richer melt, especially if you’re a cheese lover.
- Customize the Seasoning: Adjust the salt and pepper to your taste, and consider adding other spices, like crushed red pepper flakes, for a little heat.
Variations and Substitutions
- Vegetarian Option: Omit the bacon and add more vegetables like spinach, bell peppers, or zucchini for a vegetarian version.
- Different Cheese: Swap the Mexican cheese blend for mozzarella, cheddar, or Gruyère for a different flavor profile.
- Gluten-Free Option: Use gluten-free baguettes or any other gluten-free bread to make the dish suitable for gluten-sensitive diets.
FAQs
Can I make these ahead of time?
Yes! Prepare the mushroom and bacon mixture, store it in the fridge, and assemble the toasts just before baking.
Can I use a different type of bread?
Absolutely! You can substitute the French baguette with any bread you prefer, such as ciabatta or sourdough.
How do I store leftovers?
Store any leftover sandwiches in an airtight container in the refrigerator for up to 2 days. Reheat in the oven to maintain the crispiness.
Serving Suggestions
- Pair with a Salad: Serve with a side salad or fresh greens to balance the richness of the sandwich melts.
- Soup Sidekick: These melts also go wonderfully with a bowl of tomato soup or creamy mushroom soup for a hearty meal.
- Serve as Appetizers: Cut the sandwich melts into smaller pieces to serve as appetizers at your next gathering.
Suggestions
- Garnish with Extra Herbs: Add extra parsley or chives as a garnish to enhance the freshness and color of the dish.
- Make it Spicy: Add a dash of hot sauce or jalapeños to the filling for a spicy kick.
Mushroom Sandwich Melts
36
servings15
minutes40
minutesIngredients
1 medium onion, diced
3 garlic cloves, pressed
2 Tbsp unsalted butter
24 oz (1 1/2 lbs) white mushrooms, diced
8 oz bacon, chopped into thin strips
2 Tbsp mayonnaise
1/4 to 1/2 tsp salt, or to taste
1/4 tsp black pepper, or to taste
2 1/2 cups (8 oz) Mexican cheese blend, finely shredded
1/4 cup fresh chopped parsley, plus more for garnish
2 soft French baguettes, sliced into 1/2″ thick toasts
Directions
- Prep the Oven and Skillet:
- Preheat your oven to 350˚F. Line a large baking sheet with parchment paper. In a large non-stick skillet, heat 1 Tbsp of butter over medium heat. Add the diced onion and cook, stirring often, until soft and lightly golden (about 5-7 minutes). Add the pressed garlic and cook for another minute until fragrant. Transfer the onion and garlic to a mixing bowl.
- Cook the Mushrooms:
- In the same skillet, add another 1 Tbsp of butter and sauté the diced mushrooms over medium-high heat. Cook for 10-12 minutes until the mushrooms release their juices and the liquid evaporates. Transfer the mushrooms to the mixing bowl with the onions and garlic.
- Cook the Bacon:
- Add the chopped bacon to the skillet and cook until browned and crispy, about 7 minutes. Transfer the bacon to a paper towel-lined plate to drain excess fat, then add it to the mixing bowl with the mushrooms and onions.
- Prepare the Filling:
- To the mixing bowl, add 2 1/2 cups of shredded cheese, 1/4 cup chopped parsley, 2 Tbsp mayonnaise, 1/4 to 1/2 tsp salt, and 1/4 tsp black pepper. Stir everything together until well combined.
- Assemble the Sandwich Melts:
- Spoon the mushroom, bacon, and cheese mixture generously onto the toasted baguette slices. Shape and mound the mixture as needed.
- Bake:
- Place the prepared toasts on a baking sheet and bake at 350˚F for 15 minutes, or until the cheese is melted and bubbly. Garnish with additional fresh parsley before serving.

Leave a Reply