Preheat oven to 350 degrees F (175 degrees C). Grease and flour a 9×9 inch pan or line a muffin pan with paper liners. In a medium bowl, cream together the sugar and butter. Beat in the eggs, one at a time, then stir in the vanilla. Combine flour and baking powder, add to the creamed mixture and mix well. Finally stir in the milk until batter is smooth.
