Add the cocoa powder. Strain it if necessary to avoid lumps. Mix the cocoa already under the sesame paste.
Now also add the maple syrup.
Whisk everything together until it forms a paste. Add a tablespoon or two of lukewarm water if the mixture isn't smooth enough.
Transfer to sealable jars.
Notes
In this recipe, we used liquid sesame paste. If you use a thicker paste, you may need to add a few tablespoons of lukewarm water to achieve the desired smoothness.
Instead of maple syrup, you can also use honey. It's slightly sweeter and thicker than liquid tahini. In that case, reduce the amount slightly (60 grams) and, if necessary, add a little lukewarm water for smoothness.