• Preheat the oven to 375 degrees and line a baking sheet with parchment paper.

Blackberry Filling

• In a small saucepan over low heat, add blackberries and sugar. Stir
• Mix water and cornstarch together until combined and add to the blackberry mixture.
• Cook on low for 5-7 minutes or until the blackberry mixture has thickened. Set aside to cool.

Cream Cheese Mixture

• In a medium bowl, beat cream cheese until fluffy, about 2-3 minutes.
• Add sugar, egg yolk, and vanilla extract. Beat until combined.
• Cut the Pastry Dough
• Gently roll puff pastry a few times until square on a lightly floured surface.
• Spoon half of the cream cheese mixture down the center of each puff pastry leaving about 1½ inch free from filling at each end.
• Once the blackberry mixture has cooled, add half of the mixture on top of the cream cheese filling, gently spread, then repeat with the other puff pastry.
• Cut two slits at each end of the pastry about 1 inch long and fold over the top of the filling and secure to prevent mixture from leaking out.
  
• Next cut off the top and bottom side pieces at an angle (see above photo) and continue to make cuts into the pastry along each side making sure not to cut too close to the filling.
• Once the ends have been secured, start folding each piece over each other like a braid and secure.

Egg Wash

• Mix egg and water together
• Brush egg wash over both pastries and bake for 25-30 minutes or until golden brown.

Glaze Drizzle

• In a small bowl, stir powdered sugar and milk together. Drizzle over pastry on cool enough.