Soft, chewy, gluten-free delights that will remind you of the original...and satisfy just the same. Don't forget the cream of tartar! This is essential for that 'chew'.
Preheat oven to 350°F. Line baking sheet with parchment paper or silicon pad.
Whisk together flours with baking powder, salt and cream of tartar in medium size bowl. Whisk together melted oil with maple syrup and vanilla in separate small bowl; add wet mixture to dry and stir until well combined. Set aside.
Stir together sugar and cinnamon in shallow dish, i.e. pie pan or wide bowl.
Scoop out heaping tablespoon dough and roll between hands to make round ball. Roll ball in cinnamon-sugar until completely coated; transfer to prepared pan and flatten gently to about 1/2-inch thickness. Repeat with remaining dough, spacing out cookies 2-inches apart on pan.
Bake for 9-10 minutes, or until slightly golden brown and cracked on top and edges. It's important NOT to overbake, or cookies will be dry...and not chewy inside. NOTE: you may need to prepare two pans, baking one at a time.
Transfer cookies to wire rack and cool completely. Store in airtight container on counter for up to 3 days, or freeze for up to 3 months.
Important that all ingredients be at room temperature!