Rub corn flour into the stain and leave for 20 minutes to draw out oils. Brush off with a cloth or brush and examine. This may require several applications to draw the oils out completely. Pretreating the stain with a small amount of dish liquid will also help remove the stain.
Spoon the excess off as fast as you can. Sprinkle the area with artificial sweetener or flour over the stained area to absorb the grease. Soak in a mixture of mild detergent and lukewarm water for at least 20 minutes.