"Cupcake batter" refers to the mixture of ingredients that is used to make cupcakes, such as flour, eggs, sugar, and butter, before it is baked. Full definition
While your toddler is having their daytime nap, mix up a batch of cupcakes batter and frosting — download my cup cake recipe here. (toddler-activities-at-home.com)
Fill each cupcake liner with cupcake batter until it's about 2/3 full. (organicauthority.com)