In a bowl, mix together the tahini, maple syrup, and vanilla extract until smooth.

In another bowl, combine the cocoa powder, almond flour, and baking powder.

Gradually add the dry ingredients to the wet ingredients, mixing until fully combined.

Pour the batter into the prepared baking dish and spread evenly.

Bake for 20-25 minutes or until a toothpick comes out clean.

Allow to cool before cutting into squares.