Bake for 22 - 25 minutes for regular cupcakes, or 15 - 17 minutes for mini cupcakes. (delightfulemade.com)
I would note that the recipe made 18 regular cupcake size muffins. (kingarthurflour.com)
It will not be runny like regular cupcake batter, and you want it to be a thicker, dense batter which is just the result of the natural fibers in the ingredients. (heathermcclees.com)