Discover the ultimate Mushroom Sandwich Melts recipe, a perfect combination of sautéed mushrooms, crispy bacon, creamy cheese, and fresh herbs, all piled onto toasted French baguette slices. This irresistible appetizer is ideal for parties, gatherings, or a quick snack. With simple ingredients and an easy preparation process, these mushroom melts will become a favorite for any occasion.

Packed with rich flavors, these open-faced sandwiches are customizable, allowing you to swap ingredients to fit your taste. Whether you’re looking for a crowd-pleasing finger food or a warm and hearty snack, this recipe delivers every time.

These Mushroom Sandwich Melts are a savory and satisfying appetizer or snack, loaded with a creamy mushroom, bacon, and cheese filling atop crispy baguette slices. Perfect for parties or family gatherings, these cheesy bites come together with simple ingredients and pack a big flavor punch.

Ingredients

For the Filling:

1 medium onion, diced
3 garlic cloves, minced or pressed
2 Tbsp unsalted butter, divided
24 oz (1 1/2 lbs) white mushrooms, diced
8 oz bacon, sliced 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) shredded Mexican cheese blend*
1/4 cup fresh parsley, chopped, plus more for garnish

For the Base:

2 soft French baguettes, sliced into 1/2″ thick rounds

Instructions

1. Prepare the Filling:

Preheat your oven to 350°F and line a large baking sheet with parchment paper.
Heat 1 tablespoon of butter in a large non-stick skillet over medium heat. Sauté diced onions until soft and golden (5–7 minutes). Add minced garlic and stir until fragrant (about 1 minute). Transfer to a large mixing bowl.
In the same skillet, melt the remaining tablespoon of butter. Add diced mushrooms and sauté over medium-high heat until softened and the liquid has evaporated (10–12 minutes). Transfer to the mixing bowl with the onions.
In the same skillet, cook the bacon until browned and crispy (about 7 minutes). Transfer to a paper towel-lined plate to drain excess grease, then add to the mixing bowl.

2. Assemble the Filling Mixture:

To the mixing bowl, add shredded cheese, chopped parsley, mayonnaise, salt, and pepper. Stir everything together until well combined.

3. Assemble and Bake the Sandwich Melts:

Spoon the mushroom mixture generously onto each baguette slice, mounding it slightly.
Place the prepared toasts on the lined baking sheet and bake at 350°F for 15 minutes, or until the cheese is melted and bubbly.
Garnish with additional chopped parsley and serve warm.

Tips

Mushroom Variety: While white mushrooms are classic, you can use cremini or baby bella mushrooms for a deeper flavor.
Cheese Options: Feel free to swap the Mexican blend with mozzarella, cheddar, or Gruyère for different flavor profiles.
Baguette Freshness: Use fresh baguettes for the best results, but slightly stale bread also works well as it crisps up beautifully in the oven.

Variations and Substitutions

Vegetarian Option: Omit the bacon and add sautéed spinach or artichokes for a meatless version.
Herb Swap: Replace parsley with fresh thyme or chives for a different flavor twist.
Gluten-Free: Use gluten-free bread or crackers as a base.

FAQs

Q: Can I make these ahead of time?
A: Yes, you can prepare the filling in advance and refrigerate it for up to 2 days. Assemble and bake when ready to serve.

Q: Can I freeze them?
A: These are best enjoyed fresh, but you can freeze the assembled (unbaked) toasts. Bake directly from frozen, adding a few extra minutes to the cooking time.

Q: Can I use pre-shredded cheese?
A: Pre-shredded cheese works, but freshly shredded cheese melts better and has fewer additives.

Serving Suggestions

Serve these Mushroom Sandwich Melts as an appetizer at parties or gatherings.
Pair them with a light green salad or a bowl of soup for a cozy lunch or dinner.
Offer them as a snack during movie nights or game days.

Why You’ll Love This Recipe

Easy to Make: Straightforward steps with minimal prep make this recipe perfect for any skill level.
Flavorful and Savory: The combination of mushrooms, bacon, and cheese creates a rich and delicious filling.
Crowd-Pleaser: These bite-sized melts are always a hit, whether served as appetizers or snacks.

Enjoy these irresistible Mushroom Sandwich Melts as a delightful treat for any occasion!