Butter Cream Icing

I wasn't sure what kind of icing I wanted to make for the chocolate zucchini cake I planned to make for my parents' birthday's.  I loved the icing on Max's cupcakes, so Keli gave me her recipe.  Paul loved it!  And I think butter cream icing will be just the thing to get me going for the Turkey Trott this year.  It sure gave me a sugar rush!