Chocolate chip mint cupcake bust

So I made these chocolate chip mint cupcakes for my firneds 30th b-day. they didn't turn out they way I wanted them to. I used the reseipe from Cupake Wars on the food chanel. It wasn't a chocolate cake but thought since it asked for fresh mint it would be good. I made the cake and it said 25 mins. to cook..so i always cook for less, so I did 22 minutes first thing I notices is they are over cooked! After cooling they are already hard! Then to the frosting... tasted too much like butter I won't use a certain kind any more! I didnt use enough mint leaves, it said sprigs. So off  to the store to get mint extract. a teaspoon of that and it worked! Overall, the mint buttercream frosting made up a bit for the dry cupcake. This is a defient redo!! Until next time happy baking!!