Athena Vale
Steak is a primal cut of beef, and at its most basic, it is muscle from a cow. These muscles are made of bundles of cells or fibres, which are made up of proteins. The muscle fibres are surrounded by connective tissue and fat, which provide energy, flavour, and moisture to the meat as it cooks. The cooking process involves applying heat to the steak, which causes changes in the structure of the muscle fibres and water content. The way we cook steak is influenced by the type of muscle it comes from, and different cuts of steak have distinct properties that require specific cooking methods.
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What You'll Learn
Steak is muscle, but not all muscles are the same
Steak is fundamentally muscle tissue derived from a cow. Specifically, it is a collection of bundles of cells, or fibers, which are made up of various proteins. However, not all muscles are created equal, and the same is true for steaks.
The cooking approach for a particular steak depends on the type of muscle it is. For instance, a fillet steak is a fast-twitch muscle with minimal connective tissue, while a brisket is a slow-twitch muscle with abundant connective tissue. Fast-twitch muscles are designed for short, sharp bursts of activity, and cooking approaches for these steaks must account for the lack of connective tissue. If a fast-twitch muscle like a fillet steak is cooked to high internal temperatures, the meat proteins contract, squeezing out moisture and resulting in a tough, dry piece of meat. On the other hand, slow-twitch muscles like briskets are cooked to higher internal temperatures to break down the connective tissue into gelatin, creating a tender and juicy cut of meat.
The amount of intramuscular fat, or marbling, within the muscle also varies between different types of muscles. This fat provides energy to the muscle and contributes significantly to the flavor and moisture of the meat as it cooks. Therefore, the cooking approach for a specific steak may need to be adjusted based on the amount of intramuscular fat present.
Additionally, the rate at which a steak transitions from rare to well done is influenced by the moisture content within the muscle. A steak with higher moisture content may transition from rare to well done more quickly than a drier steak. This is an important consideration for cooks aiming to achieve a specific level of doneness for their steak.
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Fast-twitch vs slow-twitch muscles
Steak is, at its simplest, a type of muscle from a cow. Muscles are made of bundles of cells, or fibres, and these fibres are made up of proteins. The role of muscles is to expand and contract, which is how movement is generated. This process requires a lot of energy, which comes from oxygen delivered by blood circulation in arteries throughout the muscle.
There are two types of muscle fibres: slow-twitch and fast-twitch. Slow-twitch fibres are designed for endurance activities that require long-term, repeated contractions, like maintaining posture or running long distances. They rely on blood and oxygen to produce a type of fuel called adenosine triphosphate (ATP) for energy to function. Fast-twitch fibres, on the other hand, are necessary for speed and power. They are used for high-intensity activities like sprinting, jumping, and powerlifting. Unlike slow-twitch fibres, fast-twitch fibres rely on carbohydrates stored in the muscles, rather than oxygen, for ATP energy production. This type of fuel can be produced quickly but in limited amounts, which is why fast-twitch muscles tire out more quickly.
The proportion of each type of muscle fibre in the body depends on genetics, age, and fitness. For instance, a person who regularly engages in activities requiring quick movements may have a larger proportion of fast-twitch fibres, while endurance runners may have a larger proportion of slow-twitch fibres. Age also plays a role, as muscle mass typically peaks around 30 years of age and begins to decline in the late 30s to early 40s unless one actively works to stop that decline. Fast-twitch muscles degenerate more rapidly than slow-twitch muscles as people age, and the neuro input to these muscles also declines. However, fast-twitch muscles have a greater potential to grow with exercise than slow-twitch muscles and can generally produce more force.
The difference between fast-twitch and slow-twitch muscles also has implications for cooking steak. Fast-twitch muscles, like hanger steak, are generally more tender, while slow-twitch muscles, like brisket, short ribs, and beef cheeks, have more connective tissue. As such, slow-twitch muscles are often cooked slowly at higher temperatures to break down the connective tissue into gelatin. In contrast, cooking fast-twitch muscles without connective tissue to high temperatures can result in dry and tough meat as the meat proteins contract and force moisture out. Additionally, intramuscular fat in slow-twitch muscles helps to provide energy to the muscle and is crucial for adding flavour and moisture to meat during cooking.
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The role of connective tissue in cooking steak
Steak is fundamentally muscle, specifically the muscle from a cow. These muscles are made of bundles of cells, known as fibres, and each of these fibres is made up of additional proteins. The role of connective tissue in cooking steak is to connect muscles to bones and give the meat its structure and shape.
There are a few types of connective tissues in meat. The most common are ligaments, tendons, silverskin, and muscle fibres. Ligaments connect bones together, while tendons connect muscles to bones. Silverskin is a white layer of fibrous tissue that encases the entire muscle, and individual muscle fibres are also sheathed within the connective tissues. The purpose of connective tissue is to pull bones into movement when muscle fibres contract, so they need to be strong. The more work a muscle does, the tougher the connective tissue around it will be. For example, muscles in the legs and shoulders have thicker connective tissue than those in the back and ribs, which get less exercise.
The two main types of connective tissue are collagen and elastin. Collagen is the most abundant type and contributes to the toughness of meat. It is responsible for sheathing the elongated muscle fibres that make up a cut of meat. Collagen breaks down and turns into gelatin when heated to between 160°F to 205°F, softening and melting away. This process can take several hours. This is why collagen-rich cuts of meat can be cooked to a higher internal temperature and still remain tender.
Elastin is found in smaller amounts and provides meat with its elasticity. It forms the silverskin and ligaments in a cut of meat and is what we consider the gristle part. Gristle will always be tough and chewy due to the elastin proteins, so it is common practice to remove as much of it as possible before cooking.
Understanding the kind of connective tissue present in a cut of meat is crucial for achieving the desired tenderness during cooking. For example, cuts of meat with significant connective tissue, such as beef brisket, pork shoulder, and lamb shanks, require a lengthy and slow cooking process to break down the collagen. Techniques such as braising, smoking, and slow cooking are often employed for these tougher cuts of meat.
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The impact of fat on the flavour of steak
Steak is essentially a cut of muscle from a cow. The flavour of a steak is influenced by several factors, including the cow's diet, the cooking method, and the presence of fat.
Fat is indeed a key factor in the flavour of steak. The fat found in meat is composed of fatty acids, largely in the form of triglycerides. The taste of fat in meat has been studied for decades, and it has been found that the content and types of fat in meat impact its eating quality. The fat in steak is either intramuscular or external. Intramuscular fat, also known as marbling, is distributed within the muscle, resembling specks and lines or "veins in a leaf". This type of fat enhances the flavour, moisture, and juiciness of the steak. On the other hand, external fat, or fat cap, is a large slab of fat found on the surface of the meat. Unlike intramuscular fat, the fat cap does not significantly contribute to the flavour of the steak.
The amount and quality of fat in a steak influence its palatability and texture. Steaks with higher intramuscular fat content tend to be more tender, juicy, and flavourful. The maturity of the beef and the feeding time also play a role in the steak's flavour and tenderness. Steaks from cattle fed high-concentrate feeds for longer periods tend to have improved palatability. Additionally, the cow's diet influences the taste of the meat, with grass-fed cattle tasting different from corn-fed or those fed millet, rye, or Texas sagebrush.
The cooking method also affects the flavour and texture of the steak. When heat is applied to a steak, a process called denaturation occurs, leading to changes in the structure of the muscle fibres and water content. The transition from rare to well-done can happen rapidly, and the desired doneness varies among individuals. Medium-rare is often considered the sweet spot, balancing a crusty exterior with a warm and flavourful interior.
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The process of cooking steak
Steak is fundamentally a cut of muscle from a cow. The muscle is made up of bundles of cells, or fibres, which are composed of proteins. When a cow is slaughtered, the arteries and veins in the carcass are drained of blood, which is why steak is not bloody.
Step 1: Preparation
Bring the steak to room temperature. This ensures even cooking throughout the steak. Pat the steak dry and season generously with salt and pepper to form a flavoursome crust.
Step 2: Choose a Cooking Method
The most common methods for cooking steak include:
- Grilling: Grilling provides a smoky flavour and a charred crust.
- Pan-searing: This method creates a golden, flavourful crust.
- Sous vide: Sous vide cooking ensures precise and even cooking, resulting in a juicy and tender steak.
- Reverse searing: Reverse searing involves slow roasting the steak and finishing with a hard sear to create a crispy crust.
- Broiling: Broiling uses intense heat for fast cooking and a caramelised exterior.
Step 3: Cooking
If grilling, pan-searing, or broiling, heat the grill, pan, or broiler to a high temperature. Place the steak on the cooking surface and cook for several minutes on each side, flipping only once during the process. For sous vide and reverse searing, follow the specific instructions for those techniques.
Step 4: Basting (Optional)
For added flavour, baste the steak with garlic thyme butter as it cooks. This infuses the steak with a delicious aroma and enhances its taste.
Step 5: Resting
After cooking, let the steak rest for 5 to 10 minutes. This allows the steak to reabsorb its juices and ensures a juicy and tender final product.
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Frequently asked questions
Yes, at its simplest, steak is a type of muscle from a cow. These muscles are made of bundles of cells, called fibres, which are made up of proteins.
There are two main types of muscles in steak: fast-twitch and slow-twitch. Fast-twitch muscles are designed for short, sharp bursts of activity, such as sprinting. Slow-twitch muscles, on the other hand, are hard-working and have increased intra-muscular fat and connective tissue.
Cooking steak causes physical changes to the structure of the muscle fibres and water content. This process, called denaturation, begins at 105°F, with calcium proteins losing integrity until 122°F. The transition from rare to well-done happens quickly as moisture-eliminating heat works exponentially inside the muscle.
Yes, understanding the type of muscle helps determine the best cooking method. For example, a fast-twitch muscle like a fillet steak should not be cooked to high internal temperatures, as it will become dry and tough. Slow-twitch muscles, such as brisket or short ribs, are cooked to higher temperatures to break down the connective tissue into gelatin, enhancing flavour and texture.
