Whisk with each other brown sugar, paprika, salt, and garlic powder in a little bowl. Use fingers to rub the spice mix generously on to each side of every rooster breast. A cornstarch slurry is a combination of cornstarch and drinking water that's applied usually in Chinese cooking to thicken. https://zandertrfwc.idblogmaker.com/30275739/getting-my-chili-powder-sweet-paprika-powder-to-work