Making Blueberry Cream Cheese Puff Pastry is simple when you follow these easy steps:

1. Preheat Oven: Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.

2. Prepare Puff Pastry: Roll out the thawed puff pastry sheets on a lightly floured surface. Cut into squares, approximately 5 inches by 5 inches.

3. Make Cream Cheese Filling: In a medium bowl, combine the softened cream cheese, granulated sugar, and vanilla extract. Mix until smooth and creamy.

4. Add Blueberries: Gently fold in 1.5 cups of the fresh blueberries into the cream cheese mixture, being careful not to crush them.

5. Fill Pastry Squares: Place about 2 tablespoons of the cream cheese and blueberry mixture in the center of each pastry square.

6. Fold and Seal: Fold the corners of each pastry square over the filling to form a triangle or a rectangular envelope. Seal the edges by pressing down with a fork.

7. Brush with Egg Wash: Using a pastry brush, apply the beaten egg over the tops of the pastries for a beautiful golden finish.

8. Bake: Arrange the pastries on the prepared baking sheet and bake in the preheated oven for 20-25 minutes, or until they are puffed and golden brown.

9. Cool: Once baked, remove them from the oven. Allow the pastries to cool on a wire rack for about 10 minutes.

10. Dust with Powdered Sugar: If desired, lightly dust with powdered sugar before serving for an added touch of sweetness.

These steps will guide you to create a delightful batch of Blueberry Cream Cheese Puff Pastry that will surely impress anyone lucky enough to taste them!