Preheat oven to 350 degrees F and grease an 8x8" baking dish with non-stick spray.
Use an electric mixer to cream the butter, cream cheese, and sugar until soft and creamy.
Add the applesauce, eggs, and extracts, and continue mixing until well-incorporated. Slowly add the dry ingredients, mix well, and then use a rubber spatula to fold in the blueberries.
Pour batter into greased dish and bake 65-75 minutes, or until the top is browned and a toothpick inserted into the center comes out clean.