Preheat the oven to 350°F (175°C). Grease and flour the cake pans.

In a mixing bowl, cream together the softened butter and sugar until light and fluffy.

Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.

In another bowl, combine the flour, baking powder, and salt. Gradually add to the creamed mixture, alternating with the milk.

Pour the batter evenly into the prepared cake pans.

Bake for 25-30 minutes or until a toothpick inserted into the center comes out clean.

Let the cakes cool in the pans for 10 minutes, then remove from pans and cool completely on wire racks.

In a mixing bowl, beat the softened butter until creamy.

Gradually add the powdered sugar, alternating with milk, and mix until smooth.

Stir in the vanilla extract and mix until well combined.

Once the cakes are completely cool, spread frosting between the layers and on top and sides of the cake.