Jul 14 2026
RestaurantsFirefly Bistro & BarFrench Onion Grilled Cheese Recipe

French Onion Grilled Cheese Recipe

Time30m
Serves2

grilled sourdough with cheddar, swiss, and caramelized onion jam, au jus

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Ingredients

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Main Ingredients

Method

Preparation Steps

  1. 1

    Prepare the Ingredients

    Gather all the ingredients and ensure the cheeses are grated and the caramelized onion jam is ready.

  2. 2

    Assemble the Sandwich

    Spread a layer of butter on one side of each slice of sourdough bread. On the unbuttered side of two slices, layer half of the cheddar and Swiss cheese, followed by a generous spoonful of caramelized onion jam, and then the remaining cheese. Top with the other slices of bread, buttered side up.

  3. 3

    Grill the Sandwich

    Heat a skillet over medium heat. Place the assembled sandwiches in the skillet and grill until the bread is golden brown and crispy, about 3-4 minutes per side. Press down slightly with a spatula to ensure even grilling.

  4. 4

    Prepare the Au Jus

    While the sandwiches are grilling, heat the beef or vegetable broth in a small saucepan over medium heat until warmed through.

  5. 5

    Serve

    Cut the grilled cheese sandwiches in half and serve with warm au jus on the side for dipping.

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