Gooey French Onion Grilled Cheese

Elevate your sandwich game with this irresistible Gooey French Onion Grilled Cheese Delightful Recipe! Discover how to create the ultimate comfort food by combining sweet caramelized onions with melty Gruyère and sharp cheddar cheese. With easy-to-follow steps and simple ingredients, this gourmet twist on a classic will satisfy every cheese lover. Ready to indulge? Click through for the full recipe and step-by-step instructions that will have you savoring every bite!

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Ingredients

2 large onions, thinly sliced

2 tablespoons butter

1 tablespoon olive oil

1 teaspoon sugar

Salt and pepper to taste

4 slices of rustic bread (like sourdough or ciabatta)

1 cup shredded Gruyère cheese

1 cup shredded sharp cheddar cheese

2 tablespoons fresh thyme leaves (or 1 tablespoon dried thyme)

1 tablespoon balsamic vinegar

1 tablespoon Dijon mustard

Instructions

In a large skillet, heat the butter and olive oil over medium heat.

Add the sliced onions to the skillet. Sprinkle in the sugar, salt, and pepper. Cook for about 20-25 minutes, stirring occasionally, until the onions become deeply caramelized and golden brown.

Once the onions are ready, stir in the balsamic vinegar and thyme, cooking for an additional 2 minutes to incorporate the flavors. Remove from heat and set aside.

Butter one side of each slice of bread. On the unbuttered side of two slices, spread a thin layer of Dijon mustard.

Pile a generous portion of the caramelized onions onto the mustard-covered bread, followed by a mix of Gruyère and cheddar cheese. Top with another slice of bread, buttered side facing out.

Heat a large frying pan or griddle over medium heat. Place the assembled sandwiches in the pan. Cook for about 4-5 minutes per side, or until the bread is golden brown and the cheese is melted. If needed, lower the heat to prevent burning while ensuring the cheese melts.

Once cooked, remove from the pan and let cool for a minute before slicing in half.

Prep Time, Total Time, Servings: 15 minutes | 40 minutes | 2 servings

- Presentation Tips: Serve the grilled cheese sandwiches with a side of homemade tomato soup or arugula salad for a complete meal. Garnish with extra thyme leaves for a pop of color on the plate.