Raspberry Sour Cream Coffee Cake Muffins with Lemon Streusel Crumb Topping.~T~ I love these muffins. You can make them with raspberries, black raspberries, blueberries etc. Maybe sub sour cream for Greek yogurt?
Sugar-Crusted Blueberry Cake with Sour Cream Glaze
Blueberry Cinnamon Swirl Crumb Coffeecake Recipe ~ A coffeecake loaded with blueberries and cinnamon crumb. It is perfect for breakfast, brunch or dessert.- pretty good but not the best coffee cake I've ever had. I prefer the crumb cake from ATK