This post is old, so what you see here may not reflect my current opinion and mindset, certain information may be outdated, and links may be broken.
Made for my grandmother :D
The recipe is exactly the same as this one — just omit the chips and the nuts and add 2 tablespoon of cocoa powder to the batter once it reaches around firm or stiff peak.
I also piped it through a frosting bag and used some sprinkles. These came out much prettier than the drop method.