In separate bowl, mix in the egg whites and sugar until well incorporated. Sift in the flour into the egg and sugar mix. Mix well.
Add half the melted butter into the flour mixture and mix well. When the mixture has become well incorporated, add the last half of the melted butter. (This makes it easier to mix in the butter into the flour).
Stir in the roasted black sesame seeds! Done with the batter!
*If you don’t buy pre-roasted black sesame seeds (often found in Asian markets), you can dry roast the black sesame seeds on a fry pan for a few minutes (no oil).
Cover batter with plastic and refrigerate for 1 hour. This will make it easier to handle the batter.
In the meantime, preheat your oven to 300 degrees.
Once the batter has been refrigerated, place a dollop of batter onto a pan and spread thin to about 2.5 – 3 inches per cookie. (The cookies will not spread).
Bake for about 25-30 minutes. This will depend on your oven and the thinness of your cookies.