Place flour, salt, and sugar in the food processor and blitz a few times.
2½ cup All-purpose flour, 2 tablespoon Sugar, ¼ teaspoon Salt
Place the cubed butter in the freezer before using it. Add the cold butter to the flour mixture and pulse ten times.
1 cup Butter
In a small bowl mix the egg yolk, apple cider vinegar, and 2 tablespoons of the cold vodka. Then add to the food processor. Pulse for another ten times.
1 Egg yolk, 2 tablespoon Apple cider vinegar, 2-3 tablespoon Vodka
If the mixture looks too dry more cold vodka, one tablespoon at a time.
Until the mixture holds together when pressed between your fingers. The mixture should not be too dry not too soft and sticky.
Dump the mixture on a floured counter and knead a couple of times to gather it together. Be careful not to warm up the dough and the butter content.
Divide the dough into two disks and wrap each disk in cling wrap and chill for one hour.
Preheat the oven to 350°F. Roll out the dough on a floured surface and make a large square with ¼ inch thickness. Cut the dough into smaller 2X4 inches rectangles. Keep the other disk in the fridge until you use it.
Lightly beat the egg, and egg-wash the pieces.
1 Egg
Place about two tablespoons of apple butter in the center of one piece of the dough. Place another rectangle on top of it, and press the edges down.
Using a fork, pinch the two layers together by pressing on the edges. Seal the edges completely.
Poke the fork on top of each pie to let the steam out when baking. Brush the top with the beaten egg. bake for 20-25 minutes, or until the top is golden.