Preheat oven to 350 degrees line cup cake pans with liners; set a side. In medium bowl whisk together flour, baking power, and salt. In large mixing bowl, cream together butter and sugar until light and fluffy. Add eggs one at a time, until incorporated; scrape down sides of bowl, and beat in vanilla.
Add flour mixture and milk alternately, beginning and ending with flour. Scrape down sides of bowl and the bottom.
Divide batter evenly among liners,filling each about 3/4 full. Bake until tops spring back when touched, 20 minutes, rotating pans once if needed. Transfer to a wire rack; let cool for 5 minutes. Remove cup cakes from pans, and let cool completely on a wire rack. Once cooled, frost with your favorite frosting..