1. In a bowl mix flour baking soda and salt. In a second bowl combine well butter, brown sugar, egg yolks and the vanilla extract. Add the dry ingredients and the chocolate chips to the butter mix.
2. Turn the grill on. Select the manual mode and select yellow color setting. When OptiGrill is ready to cook drop the dough by spoon into the bottom of the snacking & baking accessory. Close the lid.
3. Cook them during 12 minutes. Flip them out at mid cooking. When they are baked, transfer to a cooling rack and let cool down.