Preheat oven to 350° and line a baking sheet with parchment paper.
Make the cookies. In a large bowl, combine the SunButter, maple syrup, and egg (or flax egg). Stir until well mixed. Add in the cacao powder, coconut flour, and baking soda and stir until dough is formed.
Scoop into 1 tablespoon balls, making 18 total. Place on the baking sheet and press down slightly. Bake 10 minutes and let fully cool before filling them. Press them down again if needed.
Make the filling. In a small bowl combine the SunButter and coconut sugar. Take a cooled cookie and spread about 1 teaspoon of the filling on the bottom side. Place another cookie on top, making a sandwich. Repeat with remaining cookies and filling.
Store in the fridge up to a week.