Tips for making as muffins instead of a cake

Prep your muffin tin however the recipe tells you to prep the cake pan (or use cupcake liners), scoop batter into the muffin tin until the cups are 2/3-3/4 full, bake at the temperature recommended in the recipe, and start checking anywhere from 15-25min (15 is very short even for muffins/cupcakes, but it'll give you an idea of how much more time you need, 25 might be too much).