Gooey Cake

Gooey Cake 1 (18 ounce) boxes German chocolate cake mix 1 1/4 cups water ( or as called for in the directions) 3 eggs ( or as called for in the directions) 1/2 cup oil ( or as called for in the directions) 1 cup Cool Whip 3 Heath candy bars, frozen 1 (14 ounce) cans sweetened condensed milk 8 ounces 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 entire cake and chill in the refrigerator. When cake is cool, top it with Cool Whip and crushed Heath candy. Refrigerate overnight before serving.