I always hate when I'm asked "how long do I bake this". My answer will always be "until its done". Baking times given on any recipe, not just mine but on ANY recipe is just a guide. It will depend on many different things. Did you preheat, is your oven actually the right temp, what size are the pans, how thick are your pans, do you have light or dark pans, what was the temp of the batter...you get the idea.