Prepare muffin tin as necessary, lining steel ones with paper muffin cups or greasing and flouring the tin. Silicon muffin pans don’t need prep work.
Combine dry ingredients and mix thoroughly (flour, baking powder, and sugar).
Add wet ingredients to dry (milk, eggs, vanilla, oil) and mix everything together
Gradually add in blueberries so they don’t form clumps
Spoon the batter into the muffin tin and place in oven
After 25 minutes test the muffins for doneness by inserting a toothpick into the center of one. If batter still clings to it return it to the oven until the toothpick comes out dry.