I have tried gf snickerdoodle recipes before and have never been satisfied. Today I tried this one from Gluten Free Homemaker and liked it the best so far.
I mixed it as the recipe recommended, but had to add another full cup of flour to prevent it running over the pan in thin trails. I added an extra half cup of brown rice flour and a half cup of my eight flour mix, just to give it some nutrients.
I baked it shy of ten minutes to keep the cookies from being too burned and crispy. I do like a chewy snicker.
Good luck with your own recipe testing.