Combine all ingredients; mix and spread in greased and floured 5-cup heart-shaped baking pan*. Bake according to package directions for 8 x 8-inch pan. Cool thoroughly. Invert onto serving plate. Spread with Honey Whipped Cream or pipe cream through pastry tube. Drizzle with hot fudge topping.

*An 8 x 8 x 2-inch pan can be substituted.