Measure the flour, salt, and sugar into a medium mixing bowl. Stir to combine and scoop out 1 cup of the mixture. Set that aside.
In the bowl of a food processor fitted with the blade attachment, place the remaining dry mixture.
Add the chilled butter and shortening and pulse for about 8-10 quick pulses until the mixture resembles cottage cheese. Fat pieces should be well coated in flour and approx pea-sized.
Pour the mixture into a medium mixing bowl, and add the cup of flour that you help back. Toss to combine.
Lightly sprinkle the water and vinegar mixture over the top of the fat and flour mix. Using a rubber spatula, gently fold in liquids.
Need very briefly until the mixture comes together. Cover in plastic and chill for 30 minutes before rolling out.
Making the Egg Wash
Separate the egg and discard the white part. Blend the egg yolk with 1 teaspoon water.
Assembling the Hand Pies
Use a rolling pin to roll the dough out until it’s about ¼ inch thick. You can use rolling strips to help maintain an even thickness.
Next, use a 2 ½ inch circle cutter to cut out circles from the rolled-out dough.
Take a pastry brush and apply a small amount of egg wash to one of the dough circles. This will act as a “glue” to seal the hand pie.
Place about 1 tablespoon of your chosen filling in the center of the egg-washed dough circle.
Now, take another dough circle and place it on top of the one with the filling.
To seal the hand pie, use a sandwich crimper cutter to crimp the edges of the two dough circles together.
Brush the top of the pies with egg wash and sprinkle with ⅛ tsp. sugar.
Allow the hand pies to chill for 10 minutes before cutting the tops with an X.
Bake at 350 degrees for 20-25 minutes or until golden brown on top.