Preheat the oven to 400˚F. Line a muffin pan with paper cups and set aside.
In a medium bowl, mix together the flour, sugar, baking powder and salt. Set aside.
In a seperate bowl, mix together the milk, oil, egg and vanilla.
Add the dry ingredients to the wet ingredients and mix until just combined. Fold in the blueberries. Do not overmix!
Divide the batter into the prepared muffin pan. Sprinkle the top with sparkling sugar.
Bake in the preheated oven for 20-25 minutes, or until a toothpick inserted comes out clean. Allow to cool in the pan.