Preheat oven to 350. In large bowl, mix together cake mix, water, oil, applesauce, and eggs until smooth. Fill each cone with about 2 1/2 T. of batter. Place upright cones about 3 inches apart on an ungreased baking sheet or muffin pan. Bake approximately 25-30 minutes. Cool completely. Soften frosting in the microwave on HIGH 10 seconds. Stir, then spread evenly over cupcakes. Place sprinkles on top, if desired.