Not my recipe, another adopted one from this site. They sound yummy though.
1 1/3 c
1Heat oven to 350 degrees.
2Oil bottom of 9-inch square pan.
3Place egg whites in a large bowl.
4Beat until slightly frothy.
5Add oil, yogurt and vanilla, mix well.
6Add sugar and cocoa, mix well.
7Add flour and salt and mix until blended.
8Pour into pan and bake at 360 degrees for 26-28 minutes.
9Avoid over baking.
10Dust with confectioners sugar.