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French Onion Grilled Cheese

French Onion Grilled Cheese

French Onion Grilled Cheese is a comforting and flavorful twist on a classic sandwich. It combines deeply caramelized sweet onions with gooey melted Gruyere and Swiss cheeses, grilled to golden perfection between crunchy yet soft bread slices. Ready in under 30 minutes, this quick and easy recipe offers a gourmet touch to a familiar comfort food favorite, perfect for lunch, dinner, or a savory snack.

Ingredients

Scale

Onions and Seasonings

  • 2 large yellow onions, thinly sliced
  • 12 tablespoons butter (or olive oil for vegan variation)
  • Salt, to taste
  • Pepper, to taste
  • Optional: fresh thyme or other fresh herbs

Cheeses

  • 1/2 cup grated Gruyere cheese
  • 1/2 cup grated Swiss cheese

Bread

  • 4 slices baguette or sourdough bread (approx. 1/2 inch thick)

Instructions

  1. Caramelize the Onions: Slice the yellow onions thinly and cook over medium-low heat with butter, stirring frequently to avoid burning. Continue to cook slowly until the onions turn golden brown, sweet, and deeply flavorful, about 20-30 minutes.
  2. Prepare the Bread and Cheese: While onions are cooking, slice your chosen bread and shred or thinly slice the Gruyere and Swiss cheese to ensure easy melting on the sandwich.
  3. Assemble the Sandwich: Spread a generous layer of the caramelized onions onto one slice of bread. Add the grated cheeses evenly on top. Optionally sprinkle fresh thyme or your chosen herbs for extra flavor. Close the sandwich with the other slice of bread.
  4. Grill the Sandwich: Heat a skillet over medium heat and add a little butter or oil. Place the sandwich in the skillet and cook for 3-5 minutes on each side, pressing gently and flipping when the bread reaches a golden brown color. Grill until the cheese is fully melted and the bread is crisp.
  5. Slice and Serve: Remove from heat and let the sandwich rest briefly. Slice in half and enjoy the perfect melty, savory bite.

Notes

  • Slow caramelization of onions is key to unlock their full sweetness and depth of flavor.
  • Butter the outside of the bread well to ensure a perfectly crispy and flavorful crust.
  • Use a heavy skillet, such as cast iron, for even heat distribution and uniform browning.
  • Avoid overloading the sandwich with cheese to prevent soggy bread; balance is essential.
  • Press the sandwich gently while grilling to help it hold together without squeezing out the air.

Nutrition

Keywords: French Onion Grilled Cheese, grilled cheese sandwich, caramelized onions, comfort food, easy sandwich, vegetarian sandwich