TWIX BARS....THE VERSION THAT WON THE TASTE TEST! Ingredients For the Shortbread Layer: 1/3 cup SOFT butter plus 1 extra tablespoon 1/3 cup granulated sugar ½ teaspoon vanilla extract ¼ teaspoon salt 1 cup flour Caramel Layer: 10 ounces Kraft caramels 1 T. heavy cream Chocolate Layer 9 ounces milk chocolate chips or 6