I have to say, this does not taste like gluten free material. I would eat this and never know the difference. Also, it's based on the most popular brownie recipe on Martha Stewart's site, and you should treat yourself to the comments, because they are hilarious.
Follow Martha and her minions' recipe here and substitute a cup of organic buckwheat flour for the regular flour and add a quarter teaspoon of xanthan gum. Heck, that might not even be necessary.
WARNING. The baking time on this recipe is incorrect. Only cook the brownies for 30 minutes, then let them cool for as long as you can stand it, maybe an hour. A really really big knife is in order for the slicing of these brownies as they are, as the commenters remarked, pretty crumbly.
