Ingredient:

• 1/2 cup butter, softened
• 1 package (8 ounces) cream cheese, softened
• 1-1/2 cups sugar
• 1 large egg, room temperature
• 1-1/4 teaspoons vanilla extract
• 2-1/4 cups all-purpose flour
• 1/2 cup nonfat dry milk powder
• 3 teaspoons baking powder
• 1-1/2 cups fresh blueberries
• 4 ounces cream cheese, cubed, frozen
• 1/2 cup confectioners' sugar