I didn't have any whole wheat flour so I substituted another 1/3 c all purpose flour and 1/3 c mix of almond flour, oat flour and quinoa flour. I left out the walnuts and the chocolate chips, and the resulting batter was pretty thick, like almost cookie thick. I baked a test ramekin and the result was NOT something that was going to pass these healthy foods into my guy's system unnoticed. I mixed in some applesauce and baked another test ramekin. The result was more moist, but still not unhealthy-seeming enough. I added more applesauce and a bunch of agave, a splash of water and a handful of chocolate chips. The resulting ramekin was super moist, maybe too moist, but much tastier. I'm now baking a small tray with peanut butter swirled in. I think when this cools, it'll pass for normal brownies, and I'll succeed in feeding him spinach, blueberries and flax seed meal after all.
Glad I saw your notes & comments... when you half the recipe it does not adjust the 'Direction' part of the recipe so I would have added 1/2 cup (vs 1/4) to the recipe which probably would have ruined it, wheeehhhh. I'm anxious to try this & comment on my success.