Mix 3

You can get these flours from Bobs Red Mill. They are certified Gluten Free by Elisa testing. You can cut the amounts if you like. I actually prefer baking by weight. I will give those values as well

                                            Small batch

4 cups amaranth flour  480g         144g
4 cups tapioca flour     480g         144g
3 cups arrowroot flour 384g         115g


Chocolate Chunk Cookies

2/3 c shortening           105g
1/2 c sugar                  105g
1/2 c brown sugar         81g
1 TBSP water               24g
1 large egg                     53g                 
1 tsp vanilla                      2g
1 1/2 c mix 3                207g
1/2 tsp baking soda           3g
1/2 tsp salt                        3g
6 0z or 604g Enjoy Life dairy, nut and soy free Mega Chunks Semi Sweet

Preheat oven to 375 degrees F. Cover cookie sheets with  parchment.

Cream shortening, sugars, and water. Add egg and vanill and mix intil smooth. Add dry ingredients except for chocolate chunks. Mix until smooth. Blend in chocolate chunks.  Drop by heaping teaspoons on cookie sheets. You may form into balls by hand for more even cookies. Bake about 10 minutes or until light brown. Cool two minutes on cookies sheets and transfer to cooling racks. You should have 3-4 dozen cookies.

Hints:
For flours: bobsredmill.com
You can get the chocolate chunks on Amazon.
Try to make your cookie sheets full, cookies are less likely to burn.