Preheat oven to 350 Degrees F.
Lightly grease standard muffin pan cups or line with paper baking cups.
Combine flour, baking powder & salt in a medium bowl. Set aside.
In a large bowl, beat the sugar & butter for a minute on medium speed using an electric mixer OR use a Stand Mixer.
Add milk & vanilla. Beat at low speed for 30 seconds.
Gradually add in the flour mixture. Beat for 2 minutes.
Add egg whites & beat 1 minute.
Pour the batter 3/4th full in the prepared muffin pans. Spoon the Blueberries on top.
Bake in a preheated oven for 25-30 minutes.
Remove from pan.
Cool completely on wire rack.
Enjoy warm.
Happy Baking!
(To reheat, microwave for 15-20 seconds/per cupcake).
