Preheat oven to 350 and line a large rimmed baking sheet with unbleached parchment paper or a silicone mat.
Use a liquid measuring cup and pour in the tahini, then the maple syrup and finally the vanilla extract. Mix well.
Use a medium sized mixing bowl and stir together the almond flour, cocoa powder, baking soda and salt. Use a fork if there are clumps that need to be dissolved.
Pour the wet ingredients into the dry and stir until dough comes together.
Use a tablespoon or small cookie scoop to portion out 18 golf ball sized cookies and drop them onto the prepared baking pan.
Wet your hands and then roll each cookie into a ball.
Place the sesame seeds into a small, shallow bowl. Roll each ball of cookie dough into the sesame seeds until fully coated and then return to the baking pan. Use the bottom of a glass to press the sesame ball down into a flat, ⅛" thick cookie.
Bake for 12 minutes. Let cool for at least 10 minutes before transferring to a wire rack. Cool completely before storing.
Notes
Nutritional information is based on using 1 Tablespoon cookie dough per cookie, with a yield of 18 cookies. Make larger cookies with a bigger scoop....flatten with a larger glass and cook for the same amount of time.