Preheat the oven to 350°F (175°C) and line a muffin tin with cupcake liners.

In a mixing bowl, whisk together the dry ingredients: flour, sugar, baking powder, and salt.

In another bowl, cream the softened butter until smooth, then add eggs one at a time, mixing well after each addition.

Stir in the vanilla extract and milk until combined.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

Fill each cupcake liner about 2/3 full with batter.

Bake for 18-20 minutes or until a toothpick inserted in the center comes out clean.

Allow to cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.