Preheat oven to 350° F.
Put gluten free flour, cocoa powder, baking soda and salt in a large bowl and set aside.
In a separate glass or ceramic bowl, place chocolate chips and butter. Microwave for 45 seconds at a time, stirring well in-between, until chocolate and butter are melted and smooth. Allow to cool briefly.
Add brown sugar; continue to mix while adding egg, maple syrup, and vanilla.
Add chocolate mixture to the bowl of dry ingredients and mix until combined.
Scoop dough by the tablespoon. Place about 1 inch apart on a nonstick baking sheet and place in the freezer for 10 minutes.
Bake for 8-10 minutes or until just set.