Ingredients: 1 cup (2 sticks) butter, at room temperature 1/2 cup granulated sugar 1/2 teaspoon vanilla extract 2 cups all-purpose flour 1 egg yolk 1 teaspoon milk Fine dry bread crumbs Jam (use any flavor jam or use 2 different flavors, such as raspberry, or raspberry and strawberry) Confectioners' sugar Instructions: 1.