Making the Blackberry Balsamic & Brie Grilled Cheese is a straightforward process that anyone can master. Follow these steps for an incredible sandwich:

1. Prepare the Balsamic Reduction: In a small saucepan over medium heat, combine the balsamic vinegar and honey (if using). Bring to a gentle simmer and reduce until thickened, about 5 minutes. Remove from heat and let cool slightly.

2. Mash Blackberries: In a bowl, gently mash the blackberries with a fork. Add salt and pepper to taste. This will be your spread for the sandwich.

3. Assemble the Sandwich: On one slice of bread, layer the sliced brie, followed by the mashed blackberry mixture. Drizzle with a bit of the balsamic reduction.

4. Top and Butter: Place a second slice of bread on top to form a sandwich. Spread butter on the outside of both bread slices to ensure a golden crust.

5. Heat the Pan: Preheat a skillet over medium heat. Once hot, add the sandwich to the pan.

6. Grill the Sandwich: Cook for about 3-4 minutes on one side until golden brown. Carefully flip the sandwich and grill the other side for another 3-4 minutes, pressing down slightly with a spatula.

7. Check for Doneness: The sandwich is done when the bread is crispy and golden, and the brie is melted.

8. Serve: Remove the sandwich from the skillet and let it rest for a minute. Slice in half diagonally for a beautiful presentation.