Caramelized Onion Grilled Cheese With Mushrooms

French Onion Grilled Cheese Featured Image.

5 from 1 vote

Caramelized Onion Grilled Cheese With Mushrooms

These buttery crispy sandwiches have the flavor of french onion soup with caramelized onions sandwiched with sauteed mushrooms, swiss cheese, and fresh thyme. This grilled cheese sandwich is the perfect lunch time indulgence!

Course lunch

Cuisine American

Keyword Caramelized Onion Grilled Cheese, French Onion Grilled Cheese, Mushroom Grilled Cheese

Prep Time 10

Cook Time 7

Total Time 17

Servings

Calories 534kcal

Author Shelby Law Ruttan

Ingredients

1 fried mushrooms recipe
½ tablespoon olive oil
1 teaspoon umami seasoning (or salt and pepper to taste)
8 slices tuscan pane bread
2 cups shredded swiss cheese
1 cup caramelized onions
½ tablespoon thyme leaves
2 tablespoon butter softened

Instructions

Cook the mushrooms as directed in the linked recipe.
Lay out 4 slices of the bread on a cutting board. Coat one side of each slice of bread with the butter.
Top each slice with ¼ cup of swiss cheese. Place ¼ of the caramelized onions, mushrooms, and fresh thyme on top of the cheese. Top the mushrooms with the remaining cheese and bread.
Heat a large grill pan over medium-low heat. Add the sandwiches, working in batches, and cook for 5 minutes per side, or until fully toasted and golden brown.

Video

Notes

Tips and Substitutions For The Best Grilled Cheese Sandwich

Make sure the bread you use is a good sturdy bread. I like to use the Tuscan Pane bread. It holds up well to any sandwich I have grilled. Any artisan bread that is nice and firm will work.
When turning the caramelized onion grilled cheese sandwich over to toast on the opposite side, be sure to use a wide thin spatula and use your other hand to help support the sandwich so it turns over without spilling the fillings out.
Use a small cast iron skillet to press the sandwich down some while it is cooking. The sandwich will look super tall, and you want the cheese to melt and bring the sandwich together.
Substitute the swiss cheese for one of your favorite cheeses. Good cheeses to use would be brie, pepper jack, mozzarella, monterey jack, and a smoked jack cheese is excellent also!
Amp the sandwich up a little and add some protein to it. Ham or Bacon are good choices. My son likes to add pepperoni slices to his.
Substitute fried baby portobello mushrooms in place of the crimini.
Toast the inside of the sandwich before assembling it to grill, this will make it extra crispy and buttery.
Sprinkle some red pepper flakes into the caramelized onions when cooking to add a little bit of heat.

Nutrition