Preheat oven to 350F.
To make cookies: Mix room temperature butter with coconut flour, sweetener and cocoa powder together in a bowl.
Roll dough out into a log approximately the diameter of the cookie you want and chill in the fridge for 1 hour.
This will help the dough to be easier to cut.
Remove from fridge and cut into slices approximately 1/4 inch thick.
The diameter of my dough was approximately 1.5 inches, and my dough made 18 chocolate cookies, or 9 Oreos.
Place onto a baking sheet and cook 8-10 minutes.
Watch closely that they do not burn.
To make the filling: Mix room temperature butter with vanilla extract and powdered sweetener.
If you cannot find powdered sweetener, such as Swerve, you can make your own by pulsing it in a blender or coffee grinder.