With just a cup of plain yogurt and a few choice ingredients you can change the look and feel of your skin. These facial masks, from world-renowned skin expert Anne-Cecile Curot, are easy to make. For maximum benefit, steam your face five minutes before applying the mask. Each mask should stay on 20 minutes - but if don’t have that much time, you will still feel results after 10 minutes. You can use either cold or room temperature yogurt, depending on your preference.