Step One - Buy a boxed brownie mix (Preferably with a coupon!)
Step Two - Puree one can of drained black beans with a smidge more than 1/2 cup of water.
Step Three - In a mixing bowl, combine brownie mix with the pureed beans, omitting any oil or egg called for on the box.
Step Four - Bake according to package directions!
Voila! Quick, easy, and sneaky! I made these brownines for Isaiah with a Pillsbury box mix and they were totally delish. Moist, chocolately, and not "beany" at all. Definitely worth a shot!
