When it comes to grilled barbecue chicken, everyone wants a nice thick barbecue glaze attached to the skin, and the only way to do it is to brush it on as it cooks. But because barbecue sauce has such a high sugar content, it only takes a minute for it to go from brick red to solid black — so you have to be careful! To ensure a sticky, sweet glaze that's not burnt, I sear the skin quickly, then cook it skin-side up on a covered grill, brushing on the glaze while it cooks. Because the glaze never touches the grilling surface, it doesn't burn.