Chocolate Caramel Slice Ingredients Crust: 1 cup unbleached all-purpose flour 1/4 cup packed light brown sugar 2 teaspoons cornstarch 1/4 teaspoon salt 1/2 cup (1 stick) chilled unsalted butter, cut into 1/2-inch cubes 1 tablespoon ice water 1 large egg yolk Caramel Topping: 6 tablespoons (3/4 stick) unsalted butter, diced 1/2 cup packed light