Preheat oven to 400° and line a baking sheet with parchment paper. Set aside.
Remove from heat, let cool for 15 minutes.
Unroll pie crust on a lightly flour surface and, with a biscuit cutter, cut pie dough into 3 inch circles.
Add a little water to the edges of the dough before filling to help seal.
Add a heaping tablespoon (or two) of blackberry sauce to the center of each pie dough. Fold dough in half and using a fork, crimp the edges to help secure the filling. Place hand pies on prepared baking sheet.
In a small bowl, whisk egg and tablespoon of water together and brush the top of each hand pie.
Bake at 400° for approximately 15-18 minutes or until golden brown. Remove from oven and enjoy warm.
Can also be served warm over pancakes, french toast, etc., or cool and use for toppings on cheesecakes, crepes, etc.