Preheat your oven to 175 degrees. Prepare your pan by rubbing butter or oil in it and set aside.

In a bowl cream together butter, sugar and oil until is creamy and well combined.

In a separate bowl,sieve flour and baking powder, miss all gently. Pour batter in already prepared pan and bake for 30 to 35 minutes.

Insert toothpick to check if is done and allow to cool for 10 to 20 minutes.