The humble coffee cake is perfect ... apple-studded sour cream cake and brown butter-walnut streusel, making for one perfect bite. Spices such as ground cardamom, cinnamon, allspice and cloves ...
This plum coffee cake is simple ... sugar, and cinnamon. Add cold butter and rub with fingers until mixture resembles coarse crumbs. Sprinkle the crumble evenly over the plums.