I made this today and it is delicious!!! The crumb topping is so crunchy and yummy. *I cut the granulated sugar from 1 1/2 cups down to 1 cup and it was great. READ & PIN.....Blueberry Cinnamon Swirl Crumb Coffeecake Recipe ~ A coffeecake loaded with blueberries and cinnamon crumb. It is perfect for breakfast, brunch or dessert.