Three and a half years ago I started to experiment with making my own gluten free flour. Obviously you can go down to any large grocery store and buy it but I just prefer to experiment and to be able to do things on my own.
I tried several different blends that I found online and then made my own tweaks. What I have learned/discovered is that no one flour or starch will allow you to bake food that approximates wheat flour but creating a blend can get you close.
I have been using the following.