Napoleon

Name: Authentic Kazakh Napoleon
Prep time: 45 min
Cook time: 30 min
Yield: 6
Cuisine: Kazakhstan
Ingredients: 300g puff pastry sheets (store-bought or homemade); 200g fresh cream cheese (softened); 100g sugar; 2 teaspoons vanilla extract; 1 cup fresh berries (raspberries, blueberries, or strawberries); 2 tablespoons butter (for brushing)