This blueberry sour cream coffee cake is a delicious twist on the classic recipe. The sour cream adds a tangy flavor and makes the cake extra moist. The blueberries add a burst of sweetness and a pop of color. The streusel topping is made with brown sugar, cinnamon, and butter, giving it a crunchy texture and a rich, buttery flavor. This coffee cake is perfect for a summer brunch or a lazy weekend breakfast.
