Preheat oven to 400°. In a small bowl or jar with a shaker lid, mix together the 2 tablespoons sugar and cinnamon; set aside.
In a medium bowl, or the bowl of a food processor, combine flour, salt, and sugar, if using.
Cut or pulse in ⅓ cup shortening until mixture resembles coarse crumbs.
If using, sprinkle mixture with vinegar and mix lightly or pulse once or twice. Continue with ice water in the same manner, 1 tablespoonful at a time, until dough is just moist enough to form a ball when lightly pressed together.
Working the dough as little as possible, shape into a ball and flatten to ½-inch thickness, rounding and smoothing edges as you go.
Place dough ball between two sheets of parchment or waxed paper and roll from center out toward edges until desired thickness is reached. Remove top sheet of parchment or waxed paper and move dough with bottom sheet of parchment to a cookie sheet or baking stone.
Using a pastry brush, spread ¼ cup softened butter over prepared pie crust. Sprinkle with cinnamon-sugar mixture. Using a pizza cutter, cut dough into roughly 2" x 3" rectangles. Separate slightly or leave cookies close together, as desired.
Bake at 400° for about 10 minutes or until the crust is lightly browned. Allow to cool slightly before eating, but these are delicious warm!
Keyword baked goods, cinnamon, cookies, pie, pie crust