For Choc chip cookies I use the recipe on the bag of chips, substituting Bette Hagman's Four flour bean mix for the wheat flour and adding 1/2 to 1 tsp. xanthan gum. The flour mix calls for 2 cups garfava bean flour, 1 cup sorghum flour, 3 cups tapioca flour and 3 cups cornstarch. Mix these 4 ingredients in a large canister with a tight lid and shake well. Then just measure and use as you would wheat flour. Don't forget to mix the xanthan gum with the dry ingredients for the recipe before using. It will help the final product to not be so crumbly.
Garfava bean flour is a blend of garbanzo and fava beans. I believe it is a trademarked name, but several companies make this blend. I buy Bob's Red Mill brand.
Good luck!