Mint chocolate chip cupcakes

In my house mint chocolate chip ice cream is a favorite...Well, I of course had to make a cupcake version and make it I did. Whenever I make these, they are gone within a day! 

Use my chocolate cake recipe and buttercream recipe, adding 1/2 teaspoons of peppermint extract and 1-2 drops of leaf green gel food coloring to the buttercream.  Use a Wilton #1M tip for the icing swirl and sprinkle with semi-sweet chocolate chips!  YUM!