Description

A warm, savory grilled cheese sandwich inspired by the classic French onion soup, crispy, gooey, and packed with flavor. Perfect for cozy nights or casual brunches.

Ingredients

Scale

4 cups thinly sliced sweet onions
2 tablespoons unsalted butter
1 tablespoon olive oil
1 cup beef or vegetable broth
1 teaspoon fresh thyme (or 1/2 teaspoon dried thyme)
Salt and pepper, to taste
8 slices sourdough or crusty bread
8 ounces shredded Gruyère cheese (or Swiss cheese)
4 ounces shredded sharp cheddar cheese
4 tablespoons unsalted butter (for grilling)

Instructions

In a large skillet over medium heat, melt 2 tablespoons butter with the olive oil. Add onions and a pinch of salt. Cook, stirring occasionally, until deeply caramelized and golden, about 25 to 30 minutes.
Add the broth and thyme to the caramelized onions. Let simmer for 10 minutes to meld the flavors. Season with salt and pepper.
To assemble, layer shredded Gruyère and cheddar between two slices of bread. Add a spoonful of the onion mixture for extra richness.
Heat a skillet over medium and melt 1 tablespoon of butter. Grill each sandwich until both sides are golden brown and the cheese is melted, about 4 to 5 minutes per side.
Repeat for all sandwiches, adding more butter as needed. Cut in half and serve hot, perfect alongside a bowl of soup!

Notes

Take your time caramelizing the onions; slow and steady wins the flavor game. Try different cheeses like mozzarella or fontina for a gourmet spin. Great for prepping ahead; onions can be made up to two days in advance.

Prep Time: 10 minutes
Cook Time: 40 minutes
Category: Sandwiches
Method: Stovetop
Cuisine: American

Nutrition

Serving Size: 1 sandwich
Calories: 400
Sugar: 5g
Sodium: 650mg
Fat: 22g
Saturated Fat: 12g
Unsaturated Fat: 8g
Trans Fat: 0g
Carbohydrates: 35g
Fiber: 2g
Protein: 18g
Cholesterol: 55mg

Keywords: French onion, grilled cheese, sandwich, comfort food