Here is another mask of yeast that you will love.
For oily skin and blackheads:
one teaspoon yeast,
3 Teaspoon yogurt .
Mix the yeast and yogurt together til you get smooth mixture and apply it to your face especially the oily area
leave it on for 20 minutes and then rinse your face with warm water and after with cold water.
Doit once a week for best results.