Description
This Caramelized Onion Grilled Cheese is the perfect blend of sweet, savory, and crispy. A gourmet twist on a classic comfort food!
Ingredients
Scale
For the Caramelized Onions:
- 2 large yellow or sweet onions, thinly sliced
- 2 tablespoons butter
- 1 tablespoon olive oil
- ½ teaspoon salt
- ½ teaspoon sugar (optional)
- 1 teaspoon balsamic vinegar (optional, for added depth)
For the Sandwich:
- 2 slices of thick-cut bread (sourdough, brioche, or artisan bread)
- 2 tablespoons butter, softened
- ½ cup grated or sliced cheese (Gruyère, sharp cheddar, Swiss, or mozzarella)
- 1 teaspoon Dijon mustard (optional, for a tangy kick)
- 1 teaspoon mayonnaise (for extra crispiness, optional)
- Fresh thyme or rosemary (optional, for extra flavor)
Instructions
-
Caramelize the Onions:
- Heat butter and olive oil in a skillet over medium-low heat.
- Add thinly sliced onions, stir to coat, and season with salt and sugar.
- Cook slowly for 30-40 minutes, stirring occasionally, until onions are deep golden brown.
- Stir in balsamic vinegar (optional) and cook for another 2 minutes.
- Remove from heat and set aside.
-
Assemble the Sandwich:
- Butter one side of each bread slice.
- Spread Dijon mustard or mayonnaise (if using) on the unbuttered side.
- Layer cheese on one slice of bread.
- Add a generous portion of caramelized onions and sprinkle with thyme or rosemary (if using).
- Top with the second slice of bread, buttered side facing out.
-
Cook the Sandwich:
- Heat a skillet or griddle over medium-low heat.
- Place the sandwich in the skillet and cook for 3-4 minutes per side, pressing gently with a spatula.
- Flip carefully and continue cooking until the bread is golden brown and crispy, and the cheese is melted.
-
Serve and Enjoy:
- Remove from heat, let sit for 1 minute, then slice and serve immediately.
- Pair with tomato soup, fries, or a fresh salad for a complete meal.
Notes
- Cook onions low and slow for the best caramelization.
- Use butter and olive oil together for rich flavor and even cooking.
- Gruyère, sharp cheddar, and gouda work best for a gooey texture.
- Press gently while cooking for even crispiness and melting.
- Store caramelized onions in an airtight container for up to 5 days for easy meal prep.
- Prep Time: 10minutes
- Cook Time: 40 minutes