Preheat oven to 325 degrees Fahrenheit and spray a 9" cake pan with cooking spray.
In a large bowl, whisk together the whole wheat flour, sugar, starch, baking powder, baking soda, and salt.
In a blender, add the tofu, applesauce, yogurt, oil, agave, stevia, vanilla, butter flavor, and almond extract. Puree until smooth. Pour over the wet ingredients and fold together until mixed through, being careful not to overmix (batter will be somewhat thick).
Pour batter into prepared pan and spread out the surface. Bake for ~1 hour, or until the surface of cake springs back when tapped.