Preheat your oven to 350°F (175°C).
Line a cupcake tin with paper liners.
In a mixing bowl, cream the butter and sugar until light and fluffy.
Add the eggs one at a time, mixing well after each addition.
Stir in the vanilla extract.
In a separate bowl, whisk together the flour, baking powder, and salt.
Gradually add the dry ingredients to the wet mixture, alternating with the milk.
Mix until just combined; do not overmix.
Pour the batter into the prepared cupcake liners, filling each about 2/3 full.
Bake for 20-22 minutes or until a toothpick inserted in the center comes out clean.