These blueberry crumb cake donuts are a delicious and fun twist on the classic recipe. The donuts are moist and tender, with a sweet blueberry filling that is topped with a buttery crumb topping. To make the donuts, you will need flour, sugar, baking powder, salt, butter, eggs, milk, vanilla extract, and fresh blueberries. The crumb topping is made with flour, sugar, and butter, and is sprinkled over the top of the donuts before baking. The result is a delicious and easy-to-make treat that is perfect for breakfast or a snack.
