What percentage of brisket is fat?

The fat content of brisket can vary, but generally, it consists of about 20-30% fat. This includes both the fat cap on the outside and the intramuscular fat, or marbling, within the meat. The specific percentage can depend on factors such as the cut of brisket and the way it is trimmed. For optimal flavor and tenderness, some fat is desirable in brisket preparation.