Bright and cheery, light and fluffy, this buttermilk lime cake is adorably appropriate to celebrate the arrival of spring. Do you have a few limes? How about buttermilk? Well then you are halfway to cake, my friends. If you short on limes, a combination of both lemon and lime works wonders as well. The zesty brightness of fresh lime pairs exceptionally well with the soft tang of buttermilk. And to top it off, we get playful and indulge our sweet tooth with a creamy cherry limeade buttercream frosting.