Preheat oven to 350 degrees F. Line 2 baking sheets with parchment paper.
In a large bowl, whisk butter, tahini, and maple sugar together well. Add egg and vanilla and whisk till combined.
In a separate bowl, mix together flour, baking powder, baking soda, and salt.
Add dry ingredients to wet ingredients and mix together until combined, being careful not to overmix. Add chocolate chips and mix to combine.
Optional: place dough in refrigerator and chill for one hour.
Scoop dough, approximately 1-2 tablespoons per cookie, onto prepared baking sheet. Place dough approximately 1 inch apart. Optional: sprinkle each with flaky sea salt.
Bake cookies for 12-15 minutes.
Allow to cool before eating.