Preheat the oven to 350 degrees.
In a large mixing bowl, combine the tahini, maple syrup, coconut sugar, eggs, and vanilla extract. Whisk until combined.
Next, add the baking powder and cacao powder. Use a spatula or wooden spoon to mix the batter together until there are no clumps. It will be very thick. Then stir in the chocolate chips using a spatula or spoon.
Spray an 8x8 glass baking dish with non-stick spray and pour the batter into the pan.
Bake for 24-26 minutes, until they are just cooked through in the middle, but not overcooked. If you want a less fudgy texture, bake them for an additional 3 minutes.
Remove from the oven and let them sit on a wire baking rack to cool for at least 5 minutes before cutting into them.