Truffle Mushroom Grilled Cheese with White Cheddar and Caramelized Onions

This isn’t your childhood grilled cheese. We’re taking it up a notch with tangy sourdough, rich white cheddar and a luxurious spread of black truffle butter. The real stars, though, are the caramelized onions and earthy cremini mushrooms, sautéed until golden and tender.

Perfect for a quick lunch or a comforting dinner, this melty sandwich comes together in under 30 minutes. Each bite delivers a perfect balance of creamy, savory and umami flavors. Trust us-you’ll never look at grilled cheese the same way again.

Log in to save recipes and build weekly shopping lists.

Ingredients

4 unit Sourdough BreadView ingredient guideLike ingredientDislike ingredient

4 ounce White Cheddar CheeseView ingredient guideLike ingredientDislike ingredient

1 ounce Black Truffle ButterView ingredient guideLike ingredientDislike ingredient

8 ounce Cremini MushroomsView ingredient guideLike ingredientDislike ingredient

1 unit Yellow OnionView ingredient guideLike ingredientDislike ingredient

2 teaspoon Olive OilView ingredient guideLike ingredientDislike ingredient

SaltView ingredient guideLike ingredientDislike ingredient

PepperView ingredient guideLike ingredientDislike ingredient

Instructions

1. Let the truffle butter sit at room temperature to soften. Meanwhile, wash and dry all produce.
2. Trim the stems from the cremini mushrooms and slice them thinly. Halve the yellow onion, peel it and slice thinly as well.
3. Heat a drizzle of olive oil in a large nonstick pan over medium-high heat. Add the sliced onion and mushrooms. Cook, stirring occasionally, until they are browned and softened, about 8-10 minutes. Season with salt and pepper to taste. Transfer the mixture to a medium bowl and set aside. Wipe the pan clean.
4. Spread the softened truffle butter evenly on one side of each sourdough slice. Place two slices buttered side up on a clean work surface. Top each with the sautéed mushroom-onion mixture and then with white cheddar cheese. Place the remaining bread slices on top, buttered side down.
5. Heat a drizzle of olive oil in the same pan over medium heat. Add the sandwiches (work in batches if needed) and cook until the bread is golden brown and the cheese has melted, about 2-3 minutes per side.
6. Remove from heat, slice each sandwich diagonally in half and serve immediately.

Recipe Tips

FAQ

Can I use a different type of cheese?

Yes, you can substitute white cheddar with Gruyère, fontina or provolone for a different flavor profile.

Can I make this sandwich ahead of time?

Grilled cheese is best enjoyed fresh, but you can prep the mushroom-onion mixture in advance and refrigerate it for up to 2 days. Assemble and cook when ready.

What can I serve with this grilled cheese?

Pair it with a simple tomato soup, a green salad or some crispy potato chips for a complete meal.