I couldn't resist trying Flying Monkey Bakery's buttercake. It's not your German Großmutter's buttercake, but it's darned good.
The big difference, to me, is that this cake is practically candy. Same flavor, same sugar and butter intensity. But it's set atop a shortbread-like base and creates an instant sugar high. Take a break from a cupcake or brownie and try this treat. Do enjoy it with a cup of Flying Monkey's coffee; I forget the roaster's name, but it's the tastiest coffee at the RTM.
If you want a comparison with a traditional German style buttercake, take a trip to Tacony, where Haegele's bakery offers the classic version.