Preheat your oven to 350°F (175°C).
Line a cupcake pan with paper liners.
In a mixing bowl, cream together the softened butter and sugar until light and fluffy.
Add eggs one at a time, mixing well after each addition.
Stir in vanilla extract.
In a separate bowl, whisk together flour, baking powder, and salt.
Gradually add the dry ingredients to the butter mixture, alternating with milk.
Mix until just combined.
Distribute the batter evenly into the cupcake liners, filling each about 2/3 full.
Bake for 18-20 minutes or until a toothpick inserted into the center comes out clean.