Preheat oven to 325 F Spray a 9 inch tube pan well with cooking spray and set aside In a large bowl mix together flour baking powder salt malted milk powder and nutmeg then set aside In a separate bowl cream sugar together with butter and sour cream until light and fluffy Add egg then egg whites beating well after each addition Stir in vanilla and milk Fold liquid mixture into flour mixture until just combined Gently fold blueberries into batter Pour batter into pan and gently even out top with spatula or spoon Bake cake until well
browned on
top and long skewer inserted in thickest part of cake comes out clean 50 minutes to 60 minutes Let cake stand in pan for 5 minutes loosen edges and invert onto a serving plate Sprinkle warm cake with confectioners sugar Serve cake warm or at room
temperature Before serving refresh cake with a dusting of confectioners sugar if desired Yield 16 servings 176 calories