The
T-bone and
Porterhouse are
steak cuts of
beef. They consist of a
T-shaped bone with meat on each side. The larger side contains meat from the
strip loin, whereas the smaller side contains the
tenderloin. T-bone steaks from the rear end of the tenderloin contain a much larger section of the tenderloin, and are called porterhouse steaks. In British usage, followed in
Commonwealth countries, only the
strip loin side is called the porterhouse, and the tenderloin side is called the
fillet.
There is little agreement among experts on how large the tenderloin must be to call a T-bone a porterhouse; some steaks with a large tenderloin may be called a mere T-bone in some restaurants and steakhouses. However, there's general agreement the tenderloin can be no thinner than the diameter of a US
quarter dollar coin (24 mm) to be classified as a porterhouse. The US Department of Agriculture's
Institutional Meat Purchase Specifications states that the tenderloin must be at least 1.25 inches (32 mm) thick at its thickest to be classified a porterhouse. Similarly, the USDA says that the tenderloin must be at least ½ inch (13 mm) thick for the steak to be classified a T-bone.
Due to their large size and the fact that they contain meat from two of the most prized cuts of beef (the
short loin and the
tenderloin), T-bone steaks are generally considered one of the highest quality steaks, and prices at
steakhouses are accordingly high. Porterhouse steaks are even more highly valued due to their larger tenderloin.
In the
United States, the T-bone has the meat-cutting classification
NAMP 1174; the porterhouse is NAMP 1173.
The origin of the name 'porterhouse' is the subject of much conjecture but very little knowledge; it has been claimed that the name derives from a
Massachusetts stockman, Zachariah B. Porter, or from a
New York City porter-
house proprietor, Martin Morrison . The
Oxford English Dictionary suspends judgement, observing that the name is "freq. supposed to derive its name from a well-known porterhouse in New York in the early 19th cent., although there's app. no contemporary evidence to support this".
Anatomy of the T-Bone
To cut a T-bone from
butchered cattle, a
lumbar vertebra is sawed in half through the
vertebral column. The downward prong of the 'T' is a
transverse process of the
vertebra, and the flesh surrounding it's the spinal
muscles. The small semi-circle at the top of the 'T' is half the
vertebral foramen.
Although the
spinal cord is removed by packers during processing, there's still concern by some (in the
European Union and
Japan) that it could be a source of
Bovine spongiform encephalopathy, more popularly known as
mad cow disease. This is because
spinal tissue contains
nerve cells which can transmit the
prion that causes the
disease.
Preparation
T-bone and porterhouse steaks are suited to fast, dry heat
cooking methods, such as
grilling or
broiling. Due to their relative lack of
collagen, longer cooking times are not necessary to tenderize the meat.
Because bone
conducts heat, and because of the differences in the two cuts of meat, different parts of the steak will reach
the desired cooked temperature at different times. The meat near the bone will cook more slowly than the rest of the steak, and the tenderloin will tend to reach the desired level of doneness before the strip.
Bistecca alla Fiorentina
A favorite of the
Italian cuisine of
Tuscany, bistecca alla
fiorentina consists of a t-bone or porterhouse steak (traditionally taken from the
Chianina breed of cattle), grilled over a wood or
charcoal fire, and seasoned with salt, black pepper, and
olive oil. It is invariably served very rare, sometimes garnished with lemon wedges; Tuscan beans are the usual side dish.
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