Loretta Lynn's Gooey Cake 1 box German chocolate cake mix 1 can sweetened condensed milk 1 cup Cool Whip® 3 Heath® candy bars, frozen 1 jar caramel topping Prepare and bake cake according to package directions, using a 13 x 9-inch cake pan. While warm, poke holes halfway into cake about 1 inch apart. Pour sweetened condensed milk into holes. Pour caramel topping over cake and refrigerate. When cool, top with Cool Whip® and crushed Heath candy. Refrigerate overnight before serving.