Step 1: Get The Stuff
cake batter (one box prepared according to package instructions)
colored sprinkles (optional)
Step 2: Filling The Pans
Place a marble between the pan and the lining paper. This creates an indentation in the baked cupcakes that is the top of the heart shape. Bake as usual.
Step 3: Cool
Step 4: Frost
Cover with colored sprinkles, if desired.