This INCREDIBLY D E L I C I O U S grilled cheese is loaded with herbed caramelized onions, melted Gruyere and white cheddar cheeses, and cooked in a savory rosemary butter. The absolute best I have ever tasted.
One bite of this gourmet grilled cheese, and you’ll never want a regular grilled cheese again! The crispy bread used was home made brioche ( prepared from scratch by culinary arts students ) then cooked in rosemary butter, layered with the gooey cheeses and an inside layer of sweet herbed caramelized onion… the ULTIMATE comfort food!
8 slices day old brioche
Mayonnaise - for spreading
12 oz Gruyere cheese - sliced thinly OR grated, at room temperature
6 oz White cheddar cheese - sliced thinly OR grated, at room temperature
4 slices thin Muenster cheese - at room temperature
2 yellow onions - diced
1 tsp fresh thyme - minced
2 tsp fresh rosemary - minced, divided
1 tsp brown sugar
Salt and pepper - to taste
3 Tbsp butter - divided
1 Tbsp olive oil
Add 1 1/2 Tbsp butter and olive oil to a skillet and heat over MED-LOW heat. Add diced onions, salt, pepper, fresh thyme and 1 tsp of fresh rosemary to the hot skillet and saute, stirring often, until onions are soft and starting to brown, about 10 minutes.
Stir brown sugar into the onions and cook another minute.
Transfer onions to a plate.
Spread one side of two pieces of bread with a little bit of mayonnaise.
To the same skillet, add remaining butter and rosemary, and heat over MED heat. Swirl to coat the bottom of the skillet with the melted butter.
Add both pieces of bread, mayonnaise side down, and cook until bread is golden brown and crunchy, about 2-3 minutes.
As soon as you add the bread to the skillet, add a bit of cheese to the top of each piece of bread. Once it starts to melt a little, sprinkle a couple tablespoons of the caramelized onions over the top of one of the pieces of bread.
When the bread is good and golden brown, sandwich the pieces of bread together and cook on LOW until cheese is fully melted.
Transfer to a plate, repeat with remaining slices of bread and ingredients.
Slice and enjoy!