Save to Pinterest A decadent twist on classic grilled cheese, this sandwich combines caramelized onions with gooey melted cheese for a deeply savory, next-level comfort food experience.
I first made this sandwich to elevate a simple grilled cheese and was amazed by how the sweetness of the onions balanced perfectly with the melted cheeses.
Ingredients
- For the Caramelized Onions: 2 tablespoons unsalted butter 2 large yellow onions, thinly sliced 1 teaspoon sugar 1/2 teaspoon salt 1/4 teaspoon freshly ground black pepper 1 teaspoon fresh thyme leaves (or 1/2 teaspoon dried) 1 tablespoon balsamic vinegar
- For the Sandwich: 4 slices sourdough or country-style bread 2 tablespoons unsalted butter, softened 1 cup (about 100 g) shredded Gruyère cheese 1 cup (about 100 g) shredded mozzarella cheese 2 teaspoons Dijon mustard
Instructions
- Step 1:
- Melt 2 tablespoons butter in a large skillet over medium heat Add sliced onions, sugar, salt, and pepper Cook, stirring occasionally, until onions are golden brown and deeply caramelized, about 25 30 minutes
- Step 2:
- Stir in thyme and balsamic vinegar cook another 2 minutes until fragrant Remove from heat and set aside
- Step 3:
- Butter one side of each bread slice Spread Dijon mustard on the unbuttered side of two slices
- Step 4:
- Layer half the Gruyère and mozzarella onto the mustard side Top with a generous spoonful of caramelized onions, then the remaining cheese Place the other bread slices on top, buttered side facing out
- Step 5:
- Heat a clean skillet or griddle over medium-low heat Cook sandwiches 3 5 minutes per side, pressing gently and flipping once, until bread is golden and cheese is fully melted
- Step 6:
- Let rest 1 minute before slicing Serve hot
Save to Pinterest This sandwich always brings my family together for a cozy meal on chilly evenings.
Required Tools
Large skillet Spatula Bread knife Cheese grater
Nutritional Information
Calories 540 Total Fat 32 g Carbohydrates 44 g Protein 22 g per serving
Category and Cuisine
Main Dish Medium Difficulty American-French Fusion Vegetarian Yield 2 servings
Save to Pinterest Enjoy this rich and comforting sandwich that’s perfect anytime you crave a gourmet twist on a classic.