Barbecue sauce is a flavoring sauce used as a marinade, basting or topping for meat cooked in the barbecue cooking style, including pork or beef ribs and chicken. It is a ubiquitous condiment and is used on many other foods as well.
Tips more Grilling the Perfect BBQ:
How much sauce will you need? Show restraint! Let the meat and smoke flavor come through. One coat is usually enough. Two max. Here's a rule of thumb: A full slab of spareribs with the tips still on will need at least 3/4 cup of a thick sauce for both sides, a slab of St. Louis cut ribs will need 1/2 cup, and a slab of baby back ribs will need 1/3 cup. But don't forget that you will want to have another 1/2 cup or so in a bowl on the table for folks who want more. If you are serving cut ribs, sauce them before you cut them. Don't sauce the cut sides. Restraint!
On pulled pork, resist the temptation to pour sauce all over the meat before serving. Make the sandwiches, and let guests crown the meat with a few spoonsful so they can still taste the meat.
Apply the sauce after the meat is ready. Depending on the cooking temp and the type of sugar, a sweet sauce can get gummy or even burn. So apply the sauce at the end of the cook, just long enough to heat it and cook it without burning it. Some sauces are great right from the bottle, but most sauces benefit from baking on the meat and they might even caramelize. If you are cooking over indirect heat, low and slow at about 225°F, and you should be, you can add the sauce about 30 minutes before removing the ribs.