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French Onion Grilled Cheese Recipe

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4.1 from 8 reviews

This French Onion Grilled Cheese is a delightful twist on the classic comforting soup, featuring layers of gooey gruyere and white cheddar cheeses, rich and sweet homemade onion jam, and buttery toasted bread. The onion jam is slow-cooked with aromatic herbs, brown sugar, and red wine to create a deeply flavorful spread that perfectly complements the melted cheeses and crispy bread. Perfect for a cozy lunch or dinner, this sandwich offers a gourmet take on familiar flavors with a satisfying grilled finish.

  • Total Time: 1 hour
  • Yield: 4 sandwiches

Ingredients

Onion Jam:

  • 3 tablespoons Olive Oil
  • 8 Small Onions, thinly sliced
  • 1 Rosemary Sprig
  • 2 Bay Leaves
  • 3 Thyme Sprigs
  • ½ cup Brown Sugar
  • ½ cup Red Wine
  • 1 tablespoon Balsamic Vinegar
  • 1 (10.5 ounce) can French Onion Soup

Grilled Cheese:

  • 8 slices Thick Sliced Bread
  • ½ cup Butter, softened
  • 1 cup Gruyere Cheese, shredded
  • 1 cup White Cheddar Cheese, shredded
  • Onion Jam (from above)
  • 3 tablespoons Grated Parmesan Cheese

Instructions

  1. Make the Onion Jam: Heat olive oil in a large skillet over medium heat. Add sliced onions, rosemary, bay leaves, and thyme. Cook, stirring occasionally, until onions are caramelized and golden brown, about 25-30 minutes.
  2. Add Sugar and Liquids: Stir in the brown sugar until dissolved. Pour in red wine and balsamic vinegar, cooking for another 2-3 minutes to deglaze the pan and blend flavors.
  3. Simmer to Thicken: Stir in the French onion soup and reduce heat to low. Let the mixture simmer for 20-30 minutes or until it thickens to a jam-like consistency. Remove the herbs and set the jam aside.
  4. Prepare Skillet for Grilling: Preheat a skillet or griddle over medium heat. Add 1 tablespoon of butter and let it melt to coat the surface.
  5. Assemble the Sandwich: Place one slice of bread on the skillet, sprinkle a layer of Gruyere cheese on top, add a generous helping of the prepared onion jam, then layer the white cheddar cheese. Top with the second slice of bread.
  6. Grill the Sandwich: Cook for 3-4 minutes until the bottom bread is golden and cheese starts to melt. Add more butter to the pan, carefully flip the sandwich, and grill for another 3-4 minutes until the other side is golden and cheese is melted through.
  7. Finish and Serve: Remove sandwich from heat and sprinkle both sides with grated Parmesan cheese. Repeat the process for remaining sandwiches. Slice each sandwich in half and serve hot for best enjoyment.

Notes

  • Use thick-cut bread for the best grilled texture and sturdiness to hold the filling.
  • Gruyere cheese melts well and adds an authentic, nutty flavor; white cheddar adds sharpness and balance.
  • Caramelizing onions slowly is key — don’t rush to ensure full flavor development for the onion jam.
  • The addition of herbs like rosemary, thyme, and bay leaves infuse aromatic depth into the onion jam.
  • Adjust the amount of butter for grilling depending on your skillet to avoid sticking while achieving a golden crust.
  • This sandwich pairs wonderfully with a light green salad or a cup of tomato soup.
  • Author: Daisy
  • Prep Time: 10 minutes
  • Cook Time: 50 minutes
  • Category: Sandwich
  • Method: Stovetop
  • Cuisine: French

Find it online: https://dishiary.com/french-onion-grilled-cheese-recipe/