Experts and BHG readers answer.
When converting a cake recipe to make cupcakes, how much do I reduce baking time?
Usually, cupcakes take about 10 minutes less baking time than cake layers. Most cupcakes reach perfection in 16 to 20 minutes.
Test them after about 15 minutes of baking time by inserting a toothpick into the center of one of the cupcakes in the inner part of the pan—if it comes out mostly dry, with just a few crumbs adhering to the pick, the cupcakes are done. If not, return them to the oven for another few minutes.