Heat oven to 350 °F.
Spray 9 inch loaf pan with baking spray. Set aside.
In a medium bowl, whisk together flour, baking powder, and salt. Set aside.
With an electric mixer, beat butter and sugar until light and fluffy, about 2-3 minutes.
Add eggs, one at a time, beating well after each addition.
Stir in vanilla.
Add dry ingredients alternately with milk, beginning and ending with flour mixture.
Spoon batter into prepared pan.
Bake for 45 minutes, or until cake tests done.