Grease an 8x8 pan with coconut oil and preheat oven to 350 degrees.
Combine tahini, maple syrup, coconut sugar, vanilla extract and eggs in a bowl and mix until thoroughly combined.
Add melted and cooled coconut oil. Add in cocoa powder incrementally, a couple spoons at a time, folding batter throughout to ensure that it is well combined between additions. Add coconut flour and baking soda and mix.
Transfer batter to prepared baking pan and spread evenly. Press additional chocolate chips on top.
Bake for 25-30 minutes or until a toothpick or cake tester inserted in the center comes out clean. Cool for at least 10 minutes before slicing and serving.