7 ½ cups brown rice flour

4 ½ cups sorghum OR buckwheat OR millet
flour

4
cups tapioca starch OR cornstarch

1 ½ cups potato starch

½ cup potato flour

1/8
cup xanthan gum

 

 

Combine
all of this together, thoroughly.  You
can use a whisk or your stand mixer with whisk attachment.  If you do that you will need to wrap your
mixer with plastic wrap so it doesn’t blow around everywhere. 

 

I
personally use a whisk, whisking after each additional flour.  I also shake it up in the container with the
lid on. 

 

You
want it to be one color with no streaks of different colors.