12/3 cups almond flour (Bob's Red Mill or Trader Joes)
3/4 cup certified gluten-free oat flour (Bob's Red Mill)
1/4 cup coconut flour (http://www.amazon.com/gp/product/B0045TSUYK)
3/4 tsp xanthan gum
I modified the amount of coconut flour from what Jennifer uses...I feel that this works better, and is less annoying to measure out. It also makes it measure 1 for 1 to regular flour more often than not, in my humble opinion. But, I do want to give credit where credit is due...and my modification is slight, so thanks Jennifer.
I just throw everything in a food processor and buzz it a couple of times, then put in a container that I used to use for flour. I make up about 2-3 batches at one time, so that I have it when I need it - less annoying that way!