Preheat your oven to 350°F (175°C) and grease an 8-inch round cake pan.

In a mixing bowl, cream together softened butter and sugar until light and fluffy (about 3 minutes).

Add the eggs one at a time, mixing well after each addition.

In another bowl, whisk together flour and baking powder. Gradually add this mixture to the butter blend, alternating with milk until just combined—do not overmix.

Pour the batter into the prepared pan and smooth the top.

Bake for 30-35 minutes or until golden brown and a toothpick inserted in the center comes out clean.