Add the eggs one at a time and mix until incorporated.
Add in the potato starch, cocoa, powdered chocolate pudding mix, baking powder, vanilla and salt. stir until all combined.
Chill the cookie dough (fridge or freezer) until firm enough to handle.
Once the cookies are ready to bake, preheat the oven to 350 degrees F.
Stir together equal parts confectioners and granulated sugar (about ½ cup each).
Scoop the cookies using a small scoop (about 2 tsp. size) and roll in the sugars.
Place dough on parchment lined baking sheet and bake until the cookies have spread and look set, about 10-12 minutes. Allow to cool completely before transferring.
Recipe by Lil' Miss Cakes at https://lilmisscakes.com/2020/gluten-free-chocolate-crinkle-cookies