Preheat your oven to 350°F (175°C).
Grease and flour two 9-inch round cake pans.
In a large mixing bowl, cream together the butter and sugar until light and fluffy.
Add the eggs, one at a time, beating well after each addition.
Stir in the vanilla extract, mixing until just combined.
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.
Mix until just combined; do not overmix.
Divide the batter evenly between the prepared pans.
Bake for 25-30 minutes, or until a toothpick inserted in the center comes out clean.
Allow the cakes to cool in the pans for 10 minutes before transferring to a wire rack.