In 1994 I was diagnosed with celiac disease, which led me to create Celiac.com in 1995. I created this site for a single purpose: To help as many people as possible with celiac disease get diagnosed so they can begin to live happy, healthy gluten-free lives. Celiac.com was the first site on the Internet dedicated solely to celiac disease. In 1998 I founded The Gluten-Free Mall, Your Special Diet Superstore!, and I am the co-author of the book Cereal Killers, and founder and publisher of Journal of Gluten Sensitivity.
Preheat oven to 325F. Grease two 12" x 15 1/2" baking sheets. In a medium bowl, whisk together the teff, sorghum, tapioca and cornstarch flours, almond meal, xanthan gum, salt, baking powder, and cinnamon. In a separate mixing bowl, beat together the butter, honey, brown sugar, and vanilla. Add in the dry ingredients and mix by hand. This should form a soft dough ball that will handle easily. (You probably will not need the water, but add small amounts if necessary.
Divide the dough into 2 balls. Place each ball on a cookie sheet and over with plastic wrap; roll it out until it covers the sheet and is about 1/8 inch thick, like pastry dough. Cut with a pastry wheel into 3" squares. Prick each square with a fork 5 times. Bake for about 25 minutes using one pan at a time.
This recipe makes about 5 dozen crackers. Even though you cut these before you bake them they bake together so I use a knife and cut again as soon as I take them out of the oven. Try to use two identical cookie sheets or jelly roll pans, or bake them one at a time - I found that my dark colored pan cooked it too fast.