This blueberry crumb cake French toast is a decadent breakfast treat. The French toast is made with thick slices of blueberry crumb cake, dipped in a mixture of eggs, milk, and vanilla extract, and cooked until golden brown. To make the French toast, you will need blueberry crumb cake, eggs, milk, vanilla extract, and butter. The recipe is easy to follow and yields a breakfast that is perfect for a special occasion or a lazy weekend morning.