Valentine Heart Cupcakes are made using a standard muffin pan and a small marble. Your kids will love making and decorating this simple, fun Valentine's Day treat!
Make cupcakes according to recipe directions.
Line a muffin tin with cupcake liners.
Spoon batter into liners, being careful not to fill each cupcake more than 1/2 full of batter. (If you fill them too full, they will loose their heart shape!)