Preheat your oven to 350⁰F. Oil an 8 x 8-inch baking pan; set aside.
In a bowl, whisk together they flour blend, cocoa powder, and salt; set aside.
In a separate, larger bowl, whisk together the egg whites, whole, egg, sugar, applesauce, oil, and vanilla until creamy.
Add the dry mixture and stir using a large spoon (such as a wooden spoon). Pour the batter into the prepared pan.
Bake for 25 minutes or until a toothpick inserted into the center comes out clean.
Remove the pan from the oven and allow the brownies to cool in the pan for at least 20 minutes. Slice into 12 squares and serve.