Blueberry Crumb Cake

Blueberry Crumb Cake

Less than 3 weeks have left until Christmas! I've already started planning my list of must-bake holiday desserts. Although this blueberry crumb cake is not a Christmas dessert, it's always nice to have a crumb cake for breakfast.  Ok, this cake is really delicious but there's one bad thing which you might have already noticed.  Why did my blueberri