Put flours, sugar, cream of tartar, baking soda, and salt in a bowl. Whisk well to remove clumps and combine.
Make a well in the middle and add apple sauce and vanilla.
Stir to get everything mixed well.
Mix coating ingredients in a separate bowl.
Form dough into balls and roll in sugar mixture. It will be a touch sticky but goes away once you roll them.
Put on a parchment lined cookie sheet.
Bake for 11-12 minutes. They will seem a little under baked but they cook more as they cool, so if you overbake they will not be as airy and soft. You want them just beginning to golden at the edges.
Serve!
Notes
You can use another sugar of choice like coconut sugar but the flavor will come out a little different.
You can add 1 teaspoon of cinnamon to the dough too if you want a bigger cinnamon flavor.