Preheat your oven to 350°F (175°C) and grease and flour two 9-inch round cake pans.

In a large 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 a separate bowl, combine the flour, baking powder, and salt.

Gradually add the dry ingredients to the butter mixture, alternating with milk. Mix until smooth.

Divide the batter equally between the prepared pans.

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

Allow to cool in the pans for 10 minutes before transferring to a wire rack to cool completely.

For the buttercream, beat together the softened butter and powdered sugar in a bowl until creamy. Add food coloring as desired.

Once the cakes are cool, spread a layer of buttercream between the cake layers and then around the sides and top of the cake. Decorate as you like!