Chocolate Cupcakes
You could use any chocolate cake rccipe that you like. See this page for some guidelines on Converting Cake Batter to Cupcakes or Muffins.
I used Hershey's Black Magic Cake recipe to make chocolate cupcakes (1/2 recipe made 14 cupcakes) and they turned out really good. I used Hershey's Special Dark cocoa in the recipe rather than their regular cocoa as in the recipe. It is a very dark cake, which I like, and I frosted them with the Chocolate Frosting recipe (which see) put out by Toll House. Instead of using Nestle chocolate chips, I made the frosting with Hershey's Special Dark semi-sweet chocolate chips. 1/2 recipe was plenty to frost the 14 cupcakes I made.
Another chocolate frosting that would work is a ganache.
These cupcakes would also be good with a simple dusting of confectioner's sugar, a vanilla frosting, or perhaps a cream cheese frosting.