If you want to make cute mini cupcakes, this recipe will yield a TON!! Cut all ingredient amounts by half.
Because oven temps vary, check doneness at 25 minutes, mine came out perfect at 30 minutes. You're looking for a nice golden color on top of the cupcakes, and of course that it's fully cooked through - you test that by inserting a toothpick or knife in the middle and if it comes out clean, it's done.
This recipe yields 24-26 cupcakes, depending on how much you fill each cavity. I suggest you fill liners to about 2/3 of the way.