You can use any flavor cake/icing/chocolate combination. I've made a ton of these: chocolate cake with chocolate icing, strawberry cake with cream cheese icing, yellow cake with chocolate icing, funfetti cake with rainbow chip icing, etc. I've dipped them in chocolate, white chocolate, rolled them in nuts, sprinkles, and drizzled them with chocolate. The different flavor combinations are endless. My favorite ones were cherry chip cake with white icing dipped in chocolate.