Preheat the oven to 350 degrees F (175 degrees C). Grease an 8x8 inch square pan.
In a medium bowl, stir together the applesauce, white sugar, egg whites and butter until smooth. Mix in the buttermilk, vanilla extract and coffee extract. Combine the cocoa, all-purpose flour, whole wheat flour, baking powder and salt; stir into the sugar mixture just until incorporated. Spread the batter evenly into the prepared pan.
Bake for 25 minutes in the preheated oven, until a toothpick inserted in the center comes out clean, but the brownies are still moist. Cool, and cut into squares.