I'm not always a huge fan of butterscotch, but I've enjoyed trying the various ways that Georgetown Cupcake incorporates butterscotch in their cupcakes. This free secret flavor, Chocolate Butterscotch, consisted of chocolate cake, butterscotch frosting, and a butterscotch swirl on top.
The fluffy butterscotch frosting was delicious, and I really hope they use this again on another cupcake flavor. The chocolate cake went really well with the butterscotch flavors up top, and it was a very tasty combo. I haven't seen this flavor come up again recently but hopefully it will soon!