Prepare cake pans. Prepare cake pans and Batter Dividing Ring with nonstick vegetable spray.
Bottom Layer: Place Batter Dividing Ring in first prepared pan. Pour sprinkle batter in smallest center ring and largest outer ring, filling 2/3 full. Pour pink batter in middle ring, filling 2/3 full. Remove ring from pan by using handles to lift ring straight up. Rinse and dry ring completely before next step.
Top Layer: Repeat bottom layer, spraying ring, then rinsing and drying ring completely before next step.
Middle Layer: Spray Batter Dividing Ring with nonstick spray. Place Batter Dividing Ring in third prepared pan. Pour dark pink batter in smallest center ring and largest outer ring, filling 2/3 full. Pour sprinkle batter in middle ring, filling 2/3 full. Remove ring from pan by using handles to lift ring straight up. Do not put ring in oven.
Bake and cool cakes following recipe instructions.