Put the oil out of the refrigerator so that it is at room temperature and rub it with sugar.
Insert eggs one at a time, each time whipping the mass until smooth.
Mix dry ingredients.
Sift the dry ingredients gradually into the butter-egg mixture and beat well. Put in the form covered with parchment paper.
Bake in the oven at 180 degrees for about 25 minutes, do not overdry the middle should be a little damp, check readiness with a toothpick or match.