Sift together dry ingredients: flour, baking powder, and salt. (Use a sifter or simply put all the dry ingredients in a small bowl and mix them with a whisk.)
Mix Wet Ingredients
Beat softened butter and granulated sugar with electric mixer until creamy.
Add eggs.
Continue mixing your wet ingredients while adding vanilla extract.
Add Together
Slowly add dry ingredients into the mix alternating with half cup of milk.
Start with the dry ingredients and end with the dry ingredients.
Fill each section of the lined muffin pan with batter about 2/3 full.
Bake for approx. 15-17 minutes or until a toothpick comes out clean when inserted in the centre of a cupcake.