These blueberry crumb cake bars are a delicious and easy-to-make treat that is perfect for a crowd. The bars are moist and tender, with a sweet blueberry filling that is topped with a buttery crumb topping. To make the bars, 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 bars before baking. The result is a delicious and portable dessert that is perfect for a potluck or a picnic.
