Found this recipe through Pinterest @ this blog. They are so yummy!
1 cup (2 sticks) salted butter, at room temperature
1 cup confectioners' sugar
2 teaspoons vanilla extract
2 cups Flour
2 cups caramel, cut into small chunks
3 tablespoons heavy cream
3 cups chopped milk chocolate or dark chocolate, melted
1 tablespoon vegetable shortening (optional)
FOR THE CRUST: Preheat your oven to 300°F. Spray a 9" x 13" pan lightly with cooking spray, or line with parchment, and set aside.
Prick the crust all over with a fork. The holes will allow steam to escape and the crust will bake evenly with fewer bubbles.