I ground 4 tablespoons of black sesame seeds and add them with half a teaspoon of sesame oil to the cookie batter. And roll cookie logs on black sesame seeds before cutting them to make these. I like it - this combination of chocolate and black sesame. Black sesame by itself doesn't have much taste or smell but it add unexpected crunch to the cookies.
I still have more black sesame left. Maybe I'll try wholewheat black sesame cookies next.