Preheat oven to 350° F. Line a cupcake pan with 12 cupcake liners.
In a mixing bowl, combine all-purpose flour, granulated sugar, baking powder, and salt. Whisk to combine.
Add milk, vegetable oil, sour cream, egg, lemon zest, and lemon juice. Whisk to combine. Do not overmix the batter.
Add the blueberries to the cupcake batter and mix until the blueberries are dispersed throughout the batter.
Portion the cupcake batter into the cupcake liners, approximately ¾ full.
Bake for 20-22 minutes or until the tops of the cupcakes bounce back slightly when touched.
Remove from the oven and cool in the pan for 5 minutes. Remove the cupcakes from the pan and cool completely.