Preheat your oven to 200°C (400°F) and line a baking sheet with parchment paper

Unfold the thawed puff pastry on a clean surface and gently smooth out any folds

Cut the pastry into small squares, about 2 inches each

Place the pastry squares onto the baking sheet, leaving space between them

Add one cube of brie cheese to the center of each square

Spoon a small amount of peach preserves on top of each brie cube

Lightly press the filling into the pastry without tearing it

Optionally pinch corners slightly toward the center for a rustic shape

Bake for 12–15 minutes until golden brown and puffed

Remove from oven and allow to cool for a few minutes before serving