Blueberry pie is a sweet pie compose of blueberry filling, usually in the form of blueberry jam, actual blueberries themselves, or some combination thereof. Blueberry pie is somewhat less sweet than blackberry pie, usually requiring an amount of sugar equal to 1/5 the number of cups of blueberries used whereas blackberry pie requires only a sprinkling of sugar for taste. The blueberries need not be stewed or soaked in water prior to baking whereas blackberry pie does require soaking blackberries prior to baking in order to prevent burning. This pie is often eaten as a dessert.