Description

A deliciously savory and sweet Caramelized Onion and Apple Grilled Cheese Sandwich combining the richness of cheddar and brie cheeses with the aromatic depth of caramelized onions, fresh sage butter, and crisp apple slices. This sandwich offers a perfect balance of flavors and textures, perfect for a comforting lunch or light dinner.

Ingredients

Scale

Bread and Butter

4 slices sourdough bread
6 tbsp unsalted butter, divided (room temperature)
1 tbsp fresh sage, chopped
1 tbsp olive oil

Filling

1 honeycrisp apple, thinly sliced
2 large yellow onions, sliced 1/2 inch thick
8 oz cheddar cheese, grated
2 oz brie cheese, sliced into 1/2” slivers
2 tsp kosher salt, divided

Instructions

Caramelize the Onions: Heat 2 tbsp of unsalted butter in a skillet over medium heat. Add the sliced onions and stir every few minutes to ensure even cooking. After 10 minutes, sprinkle in 1 tsp kosher salt to help draw out moisture. Continue cooking and stirring every few minutes for an additional 30-40 minutes until the onions turn a rich golden brown. If the skillet becomes too dry, add 1 tbsp of water to prevent burning.
Prepare Sage Butter: In a small bowl, combine the chopped fresh sage with 4 tbsp of unsalted butter and 1 tsp kosher salt. Mix well to evenly incorporate the herb and salt throughout the butter.
Assemble the Sandwiches: Place a slice of sourdough bread on a clean surface with the unbuttered side up. Layer slices of brie cheese first, followed by grated cheddar cheese. Add thinly sliced honeycrisp apples in a single overlapping layer. Spoon about 1/4 cup of the caramelized onions evenly over the apples, then sprinkle additional cheddar cheese on top. Finish with the second slice of bread. Spread 1 tbsp of the prepared sage butter on the top slice’s outer side.
Cook the Sandwiches: Heat 1 tbsp olive oil in a skillet over medium heat. Place the sandwiches into the skillet with the buttered side down. Evenly spread the remaining sage butter on the exposed top sides of the bread. Cook each side for approximately 6 minutes, or until the bread is golden brown and the cheese has melted. Serve immediately while warm and enjoy!

Notes

Use honeycrisp apples for their balance of sweetness and tartness, but other crisp apples like Granny Smith or Fuji can also be used.
Caramelizing onions takes time but is key for deep flavor; patience is essential.
Adjust salt quantity based on your preference and the saltiness of the cheese.
For a richer flavor, consider adding a drizzle of balsamic reduction when assembling.
To make the sandwich gluten-free, substitute sourdough bread with gluten-free bread.

Prep Time: 15 minutes
Cook Time: 50 minutes
Category: Sandwich
Method: Grilling/Caramelizing
Cuisine: American

Nutrition

Serving Size: 1 sandwich
Calories: 670
Sugar: 11g
Sodium: 900mg
Fat: 44g
Saturated Fat: 24g
Unsaturated Fat: 17g
Trans Fat: 0.5g
Carbohydrates: 48g
Fiber: 5g
Protein: 22g
Cholesterol: 110mg

Keywords: caramelized onion, apple, grilled cheese, sourdough, cheddar, brie, sage butter, sandwich, comfort food