Blend flour and salt in a large mixing bowl.
Mix flour and salt in a large mixing bowl. With a pastry cutter (or your cold finger tips) crumble butter into the flour until well integrated, and the butter is about the size of small peas.
Sprinkle cider vinegar over the mixture and stir in with a fork. Stir in ice-cold water, a little at a time, and blend with a fork until the dough is moist enough to roll into a ball, but not too wet.
Divide the dough into 2/3 and 1/3 and roll each into a ball.
The larger one will be rolled out into a rectangle or circle, depending upon the kind of dish you use, and the smaller one will be rolled out into a flat shape so you can cut the star shapes out of it. Be sure to roll the dough out to a dimension of 5 inches larger than the shape of the dish, so you have plenty to cover the entire inside of the dish, plus some for rolling and fluting the edge.
Flute the edges of your pie crust and cut out the star (and stripes if making them) from the second ball of dough. Use any remaining dough for cinnamon roll ups. Recipe in notes.