Prepare the Puff Pastry: Preheat the oven to 400°F (200°C). Line a baking sheet with parchment paper. Lightly roll out the puff pastry and place it on the prepared sheet. Sprinkle with granulated sugar.
Bake Until Golden: Bake for 12-15 minutes or until the pastry is puffed and golden brown. Remove from the oven and let it cool completely.
Make the Vanilla Whipped Cream: In a mixing bowl, combine the chilled heavy cream, powdered sugar, and vanilla extract. Beat with a whisk or electric mixer until soft peaks form. Do not overwhip.
Assemble the Dessert: Break or cut the puff pastry into pieces. Layer each piece with a generous dollop of whipped cream.
Garnish and Serve: Top with fresh raspberries and garnish with mint leaves if desired. Serve immediately for the best texture.