For my Mom's birthday, I wanted to bake her a special cake, one I had never made before. So I searched and searched every website I could think of until I ran across smitten kitchen's recipe for the best birthday cake.
The recipe called for a classic yellow cake (and I must add this yellow cake recipe has become a new staple in my kitchen) with a chocolate frosting that was made with sour cream, instead of butter.
It wasn't typical of chocolate frosting that I have made before. The chocolate taste was mild, and it had a slightly sour aftertaste (from the sour cream, I think). It wasn't what I expected, but was still pretty good, especially the day after. I would opt for a different frosting next time, but I'm glad I tried this one.