This is based on my previous recipe for Gingerbread people. I just changed a few things with the premise of making a cookie that included flax that my kids would eat. This one works.
1/3 cup brown rice or sorghum flour
1/3 cup ground flax seed
2/3 cup tapioca starch
1 tbsp carob or cocoa powder
1 TBL cinnamon
1 tsp ginger (use more for a cookie with a real ginger bite)
2 tsp xanthan gum
1 tsp baking soda or 2 tsp baking powder
1/2 tsp salt
1/4 cup sugar
1/4 cup oil
1/4 cup DariFree or other milk sub
Combine dry ingredients in a large bowl. Then, add the liquids.
Mix well. Add tapioca if necessary to get a dough that you can knead.
Roll the dough out on a floured board or surface, using the tapioca, to about a quarter-inch thickness. Cut out gingerbread person shapes, flouring the cutter with tapioca.
Bake at 350 degrees on a greased cookie sheet (Spectrum shortening) for about 10 minutes. Remove from pan and cool on a rack.
FYI -- I grind my own flax seed and save a bundle. I buy flax in bulk at $1/lb, put it through a coffee grinder, and then regrind it, and use it as a flax flour. I also use the flax for my flax eggs that you'll see here from time to time.