Preheat oven to 350°F (175°C) and line a muffin tin with cupcake liners.
In a large bowl, cream together the butter and sugar until light and fluffy.
Beat in the eggs one at a time, then 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 ingredients, alternating with the milk, beginning and ending with the dry ingredients. Beat until just combined.
Fill each cupcake liner about 2/3 full.
Bake for 18-20 minutes, or until a toothpick inserted into the center comes out clean.
Let the cupcakes cool in the muffin tin for a few minutes before transferring them to a wire rack to cool completely.
Notes
These cupcakes are best enjoyed fresh. Store in an airtight container at room temperature for up to 3 days.