Description

A gourmet twist on the classic grilled cheese sandwich featuring tangy homemade blueberry jam infused with lemon and thyme, layered with melted mozzarella and white cheddar between crispy sourdough bread. Perfect for brunch, lunch, or an indulgent snack this sweet-and-savory sandwich is easy to make and bursting with bold flavor.

Ingredients

For the Blueberry Jam:

– 1 pint (2 cups) fresh blueberries (or thawed frozen blueberries, drained)

– ¼ cup sugar

– 1 tablespoon lemon juice

– 1 small bundle of lemon thyme (tied with kitchen twine)

For the Sandwiches (makes 4):

– 8 slices sourdough bread (or substitute with whole wheat, rye, or gluten-free)

– 4 oz shredded mozzarella cheese

– 4 oz grated white cheddar cheese

– 4 tablespoons unsalted butter, softened

– Flaky sea salt, for finishing

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Instructions

Make the blueberry jam: In a 2-quart saucepan, combine blueberries, sugar, lemon juice, and thyme bundle. Bring to a simmer over medium heat. Cook for 15–20 minutes, stirring occasionally, until thickened and jam-like. Remove from heat, discard thyme bundle, and let cool slightly.
Assemble sandwiches: Butter one side of each slice of bread. Place a slice of bread, buttered-side down, in a preheated 12-inch cast iron skillet over medium-low heat.
Layer with mozzarella, white cheddar, and 1–2 tablespoons of warm blueberry jam. Top with a second slice of bread, buttered-side up.
Cook for 3–4 minutes per side, pressing gently with a spatula, until golden brown, crispy, and cheese is fully melted. Cover with a lid for the last minute to help melt the cheese if needed.
Transfer to a cutting board, sprinkle with flaky sea salt, and serve immediately.

Notes

– For a vegan version: use plant-based butter and dairy-free cheese.

– Customize with goat cheese, brie, arugula, or fig preserves for unique flavor twists.

– The blueberry jam can be made ahead and stored in an airtight container in the fridge for up to 1 week.

– Assemble sandwiches ahead of time but grill just before serving to maintain crispiness.

– Reheat leftovers in a skillet—never microwave—to preserve texture.

Prep Time: 15 minutes
Cook Time: 20 minutes (includes jam + grilling)
Category: Lunch, Brunch, Sandwich
Method: Stovetop
Cuisine: American, Gourmet Comfort Food

Nutrition

Serving Size: 1 sandwich
Calories: 420
Sugar: 14g
Sodium: 580mg
Fat: 24g
Saturated Fat: 13g
Unsaturated Fat: 9g
Trans Fat: 0g
Carbohydrates: 36g
Fiber: 3g
Protein: 16g
Cholesterol: 55mg