Sour cream coffee cake

Oh my goodness...this is so good! The recipe is from Barefoot Contessa Parties and it is an amazing treat to serve guests on a weekend morning. The cake is wonderfully moist and has layers of streusel (cinnamon, sugar, walnuts...YUM!) throughout. A drizzling of maple icing on top puts this one over the top. It's a party on its own, but an egg casserole and a fruit compote would round out the menu. Serve this and your family and friends will be singing your praises...