Preheat your oven to 350°F (175°C).
In a large bowl, cream together the butter and sugar until light and fluffy.
Add eggs one at a time, mixing well after each addition.
Stir in the vanilla extract.
In another bowl, mix the flour, baking powder, and salt.
Gradually add the dry ingredients to the creamed mixture, alternating with milk.
Mix until just combined.
Pour the batter into a greased cake pan.
Bake for 30 minutes or until a toothpick inserted in the center comes out clean.
Let the cake cool before frosting and decorating with Easter-themed treats.