This blueberry coffee cake is a delicious twist on the classic recipe. The cake is loaded with fresh blueberries and has a crunchy streusel topping. The recipe is easy to make and requires simple ingredients like flour, sugar, butter, and eggs. The blueberries add a burst of flavor and color to the cake, making it perfect for a summer brunch or dessert. Serve it warm with a dollop of whipped cream or vanilla ice cream for a decadent treat.