The meat: Texas BBQ is synonymous with beef brisket. The meat is dry-rubbed first and then smoked, often with mesquite wood, which produces a strong smokey flavor.
The sauce: Texans prefer a traditional tomato-based barbecue sauce, which is added to the meat after smoking.
The slaw: Texas slaw typically uses a mayo-based dressing, and is sometimes jazzed up with Southwestern flavors like cilantro and corn.
Source: Flickr user Marshall Astor - Food Pornographer