Preheat oven to 180°C. Line a muffin tin with cupcake liners.

Cream butter and sugar until light and fluffy.

Beat in eggs one at a time, then add vanilla extract.

Sift flour, baking powder, and salt together.

Add dry ingredients to wet mixture alternately with milk, mixing gently.

Divide batter evenly among liners.

Bake for 18-20 minutes, or until a toothpick comes out clean.

Cool completely before serving.