if using pillsbury or betty crocker cake mix you do not need to add the sugar. they have pudding in the mix. mix all ingredients but the blueberries. mix well. this will be thick. add the dusted blueberries. put in greased bundt pan. bake 50 min. let cool 10 minutes and take out of pan. i drizzle with a powderd sugar glaze or just powdered sugar. this is moist and keeps well. some of the off brands of cake mixes do not work as well in this recipe.