Heat oven to 350 degrees. Line cupcake pan with paper liners; set aside. In a medium mixing bowl, whisk together flour, baking powder, and salt. In another mixing bowl, cream the butter and sugar until light and fluffy, about 4 minutes. Add eggs one at a time, mixing until incorporated and scraping down sides of bowl, beat in vanilla.

Add flour mixture and milk alternately, beginning and ending with flour. Scrape the sides and bottom of bowl to assure the batter is thoroughly mixed. Divide batter evenly among liners, filling papers about 2/3 full. Bake on the center rack of the oven until tops spring back to touch, about 20 minutes. Transfer to a wire rack to cool completely.