Ingredients

• 1 sheet puff pastry (from a 17 1/4-oz package), thawed
• 3 tablespoons crème fraîche
• 2 teaspoons granulated sugar
• 3 oz raspberries (1/2 cup)
• Confectioners sugar for dusting

Instructions

1. Put oven rack in upper third of oven and preheat oven to 400°F.
2. Unfold pastry sheet and cut a 3-inch square from pastry with a sharp knife (reserve remaining pastry for another use).
3. Bake pastry square on an ungreased baking sheet until golden brown, 15 to 20 minutes. Transfer pastry to a rack and cool completely, then cut pastry horizontally into 2 layers. Stir together crème fraîche and granulated sugar until sugar is dissolved.
4. Just before serving, put bottom half of pastry on a plate and top with crème fraîche and raspberries, letting some berries spill onto plate. Cover with top half of pastry and dust with confectioners sugar.