Preheat your oven to 350°F (175°C).
Grease and flour two 9-inch round cake pans.
In a large bowl, cream together the softened butter and granulated sugar until light and fluffy.
Add eggs one at a time, mixing well after each addition.
Stir in vanilla extract.
In a separate bowl, whisk together flour, baking powder, and salt.
Gradually add the dry ingredients to the wet mixture, alternating with milk.
Divide the batter evenly between the prepared pans.
Bake for 30-35 minutes or until a toothpick inserted into the center comes out clean.
Let the cakes cool in the pans for 10 minutes before transferring to a wire rack.