Cut/dice blackberries, then mix up in a bowl with your sugar. You can add more or less sugar depending on your taste, but make sure there is a nice balance because it will be a "jam" like texture after baking.
Divide crust shapes into two piles, then spread one of the piles out on a baking sheet.
Drop a small spoonful of berries onto the center of each crust, making sure to leave a finger width sized edge all around.
Top with the other half of your crusts, then go around all edges with a fork to seal.
Bake at 350 for 15-18 minutes or until crust is golden brown.
Serve as-is, sprinkle with crystal sugar, or drizzle in a favorite icing.