Preheat oven to 375 F. Spray 12
standard size muffin-pan cups with vegetable cooking spray or use
cupcake liners. Mix together flour, sugar, baking powder and salt. Mix
together milk, oil, apple sauce, egg and vanilla. Make a well in the
center of flour mixture. Add milk mixture all at once to well, tossing
with a fork until dry ingredients are just moistened. DO NOT OVER MIX.
Fold in Blueberries. Spoon batter into prepared pan, filling cups 2/3
full. Bake muffins until tops are firm and golden, 20 to 25 minutes.
Transfer pan to a wire rack to cool slightly. Turn muffins out onto rack
to cool completely.