Keep your towering buttercream fortresses. I'll take a crumb cake loaded with fruit and buttery streusel any day. This is coffeecake in the best style, perfect for all-day eating. A soft sour cream butter cake, threaded through with a sugary nutty streusel, then topped with blueberries and crumbs. This is all that's needed to gain entry to the clubbiest Kaffeeklastch.
My colleagues...well let's just say they agreed. I was glad I'd had a square for breakfast, because by the time my coffee break arrived, it was no more. I followed the recipe fairly faithfully, only substituting almonds for walnuts in the streusel.