Fat Free Brownies

I am beginning a quest to find the perfect brownie and I thought why not start off with a healthy, fat free recipe. These may not be 100% perfect but they're pretty darn close.
For my applesauce recipe click here.

Ingredients:
3/4 cup unbleached flour
1/4 cup plus 2 tablespoons cocoa powder
1 cup sugar
1/3 cup unsweetened applesauce
3 egg whites
1 teaspoon vanilla extract

1. Preheat the oven to 160°C (325°F Gas mark 3.) Grease  and line a 20cm square tin.
2. Combine the flour, cocoa and sugar. Stir in the applesauce, egg whites, and vanilla extract.
3.  Spread the batter evenly in the pan and bake for 23-25 minutes, or just until the edges are firm and the center is almost set.
4. Leave to cool and cut into 25 squares.