Name: Mushroom and Swiss Croissant Sandwich
Prep time: 10 min
Cook time: 10 min
Total time: 25 min
Yield: 4
Cuisine: French-American
Ingredients: 4 large all-butter croissants, sliced horizontally; 1 lb cremini mushrooms, sliced; 4 slices Swiss cheese; 2 tbsp unsalted butter, divided; 1 tbsp olive oil; 2 cloves garlic, minced; 1 tsp fresh thyme leaves (or ½ tsp dried thyme); Salt and freshly ground black pepper, to taste

Savor the rich, earthy flavors of this Mushroom and Swiss Croissant Sandwich, where buttery, flaky croissants embrace sautéed mushrooms and melted Swiss cheese. Perfect for breakfast or lunch, this gourmet treat combines creamy textures and savory notes, making every bite a delightful indulgence for any food enthusiast.

Why You’ll Love This Recipe

This Mushroom and Swiss Croissant Sandwich is a culinary gem that elevates your meal with minimal effort. The golden, flaky croissant provides a buttery crunch, perfectly complementing the umami-packed mushrooms sautéed with garlic and herbs. Melted Swiss cheese adds a creamy, nutty depth that ties everything together. It’s quick to prepare, versatile for any time of day, and feels like a café-style treat right at home. Whether you’re a busy professional needing a fast yet fancy meal or a foodie craving comfort, this sandwich delivers satisfaction in every bite.

Recipe Tips and Tricks

Use Fresh Croissants: Day-old croissants work, but fresh ones yield the best flaky texture.
High Heat for Mushrooms: Sauté mushrooms on high heat to avoid wateriness and achieve a golden sear.
Don’t Overcrowd the Pan: Cook mushrooms in batches to ensure even browning.
Cheese Melting: Cover the pan briefly when melting Swiss cheese for a gooey texture.
Herb Boost: Fresh thyme or rosemary enhances the mushrooms’ earthy flavor.
Butter Brushing: Brush croissants with melted butter before toasting for extra richness.
Sharp Knife: Use a serrated knife to cut croissants cleanly without squishing them.
Rest Before Serving: Let the sandwich sit for a minute to let flavors meld.

Yield: Makes 4

Mushroom and Swiss Croissant Sandwich

Flaky croissants stuffed with sautéed mushrooms and melted Swiss cheese, perfect for a quick, gourmet breakfast or lunch.

Prep Time 10 minutes

Cook Time 10 minutes

Additional Time 5 minutes

Total Time 25 minutes

Ingredients

4 large all-butter croissants, sliced horizontally
1 lb cremini mushrooms, sliced
4 slices Swiss cheese
2 tbsp unsalted butter, divided
1 tbsp olive oil
2 cloves garlic, minced
1 tsp fresh thyme leaves (or ½ tsp dried thyme)
Salt and freshly ground black pepper, to taste

Instructions

Gather Your Ingredients: Start by prepping all ingredients—slice the mushrooms, mince the garlic, and have your thyme ready. This keeps your cooking flow smooth and stress-free!
Heat the Pan: Place a large skillet over medium-high heat, adding 1 tablespoon of butter and the olive oil. Let it sizzle until the butter melts and foams.
Sauté the Mushrooms: Add the sliced mushrooms in a single layer (work in batches if needed). Cook for 4-5 minutes, stirring occasionally, until golden brown and slightly crispy.
Season the Mushrooms: Toss in the minced garlic, thyme, a pinch of salt, and a grind of black pepper. Stir for 1-2 minutes until fragrant. Remove from heat and set aside.
Prep the Croissants: Preheat your oven to 350°F. Place the croissant halves on a baking sheet, cut side up. Brush lightly with the remaining butter for extra flavor.
Toast the Croissants: Pop the croissants in the oven for 3-4 minutes until slightly crispy. This enhances their buttery, flaky texture.
Assemble the Base: On the bottom half of each croissant, spoon a generous portion of the sautéed mushrooms, spreading them evenly.
Add the Cheese: Place a slice of Swiss cheese over the mushrooms on each bottom half. The heat from the mushrooms will start to soften it.
Melt the Cheese: Return the baking sheet to the oven for 2-3 minutes, until the cheese is melted and bubbly. Keep an eye on it to avoid overcooking!
Finish and Serve: Place the top half of each croissant on the cheesy mushrooms. Let the sandwiches rest for a minute, then serve warm with a side salad or chips for a delightful meal.

Notes

Avoid washing mushrooms; wipe them with a damp paper towel to prevent sogginess.
For extra richness, add a drizzle of truffle oil after assembling.
Serve immediately for the best texture, as croissants soften over time.

Nutrition Information

Yield

Serving Size

1
Amount Per ServingCalories 490Total Fat 32gSaturated Fat 17gTrans Fat 0gUnsaturated Fat 12gCholesterol 86mgSodium 447mgCarbohydrates 37gFiber 3gSugar 10gProtein 16g

The recipes and nutritional information on Yum Tonight are for informational purposes only. Always consult a healthcare provider for personalized dietary advice.

Ingredients Notes

Croissants: Opt for all-butter croissants for maximum flavor and flakiness; bakery-fresh is ideal.
Mushrooms: Cremini or button mushrooms offer robust flavor, but shiitake or oyster add a gourmet twist.
Swiss Cheese: Choose high-quality Swiss for its nutty, melty goodness; Gruyère is a great alternative.
Butter: Unsalted butter allows better control over seasoning.
Garlic: Fresh garlic cloves provide a bold, aromatic kick; avoid pre-minced for best flavor.
Thyme: Fresh thyme sprigs elevate the dish, but dried thyme works in a pinch.
Salt and Pepper: Kosher salt and freshly ground black pepper enhance natural flavors.
Olive Oil: A splash helps sauté mushrooms evenly; extra-virgin adds a fruity note.

Variations and Substitutions

For a twist, swap Swiss cheese with cheddar for a sharper bite or brie for creamier decadence. Add caramelized onions for sweetness or spinach for a nutrient boost. Use portobello mushrooms for a meatier texture or mix in wild mushrooms for complexity. For a vegan version, substitute dairy butter with plant-based butter and use vegan cheese. Gluten-free croissants or bread can replace traditional croissants. Add a fried egg for a breakfast spin or bacon for extra savoriness. Experiment with herbs like rosemary or parsley to customize the flavor profile.

Storage Options

Store assembled sandwiches in an airtight container in the fridge for up to 2 days. Reheat in a 350°F oven for 5-7 minutes to restore crispness. Sautéed mushrooms can be prepped and refrigerated for 3 days. Avoid freezing, as croissants may lose their flaky texture. Wrap tightly to prevent sogginess.