Every time you step up to your grill or into your kitchen, you begin a science experiment. Meat goes through physical and chemical changes when it’s heated. These changes are both scientific and magical. A basic understanding can help you cook juicier chicken breasts and more tender steaks. This article gives a general idea of the ideas; the links inside take you to articles that go into more detail.
Meat is cut from the muscles of mammals and birds. For some reason, fish muscle is not considered meat by some people, but it should be.
Water makes up about 75% of lean muscle tissue, followed by protein (18%), fats (5%), carbohydrates, salt, vitamins, sugars, and minerals (2%). Here are some specifics.
Different cuts from within an animal can differ significantly. As shown above, the average water content of pork is 69%. Pork rib meat, on the other hand, is mostly water, protein, fat, and 2% carbohydrates, vitamins, sugars, and minerals. Even so, 65% is pretty high percentage of water. There is so much water in the meat that any loss from poking it with a thermometer or a fork is small. Don’t listen to the snobs who say that using a thermometer or a fork to check the temperature or turn the meat is going to ruin it. To illustrate: if you have an 8 ounce filet mignon, 6 ounces is water. If you stab it, a few drops will come out of the hole, which isn’t much of the 6 ounces. When you poke meat with a thermometer or fork, it doesn’t go flat like a balloon.
Muscle cells are more frequently called muscle fibers because they are shaped like tubes. Muscle fibers bundled together are called sheaths, and sheaths bundled together are called muscle or meat.
The fibers are about the thickness of a human hair and are made up of different types of protein. Myosin and actin are two of them. They bind water and contract and relax when told to, like living motors. As an animal ages, grows, and exercises, its muscle fibers get thicker and tougher. And muscles in the shoulders, legs, and back get thicker and tougher than the “tenderloins,” which are smaller, softer muscles that run along the spine of the animal.
Myoglobin is another important protein in muscle fibers. Myoglobin receives oxygen and iron from hemoglobin in blood, fuel necessary for muscles to function. Even though myosin and actin don’t dissolve in water, myoglobin does. The pink liquid that comes out of raw meat packages or when we cut cooked meat on a plate is myoglobin dissolved in water. Myoglobin is the protein in meat that makes it appear red. Meat scientists at Texas A&M say that eight milligrams of myoglobin are found in every gram of beef. Lamb has about 6 milligrams per gram, pork about 2 mg/g, and chicken breast about 0. 5 mg/g. If chicken is the other white meat, then lamb is the other red meat (click here to tweet this). When warmed, meat juices containing myoglobin lose their red color, become lighter pink, and eventually tan or gray. Muscle fibers also contain other proteins: enzymes. Enzymes play an important role in aging meat.
Tendons connect muscles to bones and ligaments join bones to each other. It is also visible as the thin shiny sheathing that wraps around muscles called silverskin or fascia. These tougher, chewier connective tissues that look like rubber bands are mostly made up of collagen and elastin, while muscles are mostly made up of myosin. ) We call them gristle and they shrink when heated and become hard to chew. As with muscle fibers, connective tissues thicken and toughen as an animal exercises and ages.
Collagen is a type of soft connective tissue that is found all over muscles. It often surrounds fibers and holds them together with sheaths. Like the stuff in Jell-O, collagen melts when it’s cooked and turns into gelatin, a thick liquid. Cooked muscle fibers, no longer bound together by collagen, are now uniformly coated with a soft, gelatinous lubricant. This smooth and sensual substance enrobes meat in a wonderfully silken texture and adds moisture. Also, this is pretty much the same stuff that Hollywood wives have had injected into their faces to get rid of wrinkles.
It’s not found in large amounts in lean meats like beef, pork loin and tenderloin, and most chicken and turkey. As you cook tough cuts of meat with a lot of connective tissue, like ribs, brisket, and shoulder, you need to turn that connective tissue into gelatin. This is what makes these tough meats taste tender. This takes time. That’s why these cuts are often cooked low and slow. Muscle fibers start seizing up around 125°F to 140°F if heated quickly. But when heated slowly, the rubber band-like connective tissues have time to relax and do not squeeze tightly. In general, it is best to cook all meats at about 225°F. Slow roasting does wonders for meat. The AmazingRibs. com science advisor Prof. Greg Blonder says “Think of silly putty. Pressed hard and quickly, it acts like a rigid solid. Pressed slowly, it flows. When heated slowly, the muscle fibers don’t wring out water; instead, they relax and let the water stay inside until it evaporates.
Gelatin can solidify into that gooey stuff after it melts and chilled. With a little filtering, this can be called aspic and served at bridge clubs. This is a pot of the stuff I made by boiling two chicken bodies in water after I ate the meat, threw away the bones, and chilled the liquid. The white is fat, most of which I have removed, and the tan is jiggly gelatin.
Fats (lipids) and oxygen are the main fuels that power muscles. Fats are packed with calories, which are potential energy released when the chemical bonds are broken. From a culinary standpoint, fat comes in three types (see the photo at the top of the page):
Large fat deposits can also be found around organs, especially kidneys. Leaf lard, which comes from around the kidneys of pigs, is the best of this type of fat for cooking, especially if you like to make pie crusts.
Fats are crucial to meat texture. Fats start to melt around 130°F to 140°F, lubricating muscle fibers just as they get tougher and drier from the heat. When fats are cold, they are waxy. Fat does not evaporate like water when you are cooking.
Fat also provides much of the flavor in meat. It absorbs and stores many of the aromatic compounds in the animal’s food. As the animal ages, those flavor compounds build up and get more noticeable. If the fat is kept too warm, for too long, or in contact with oxygen after the animal has been killed, it can go bad. So we have a tradeoff. As the animal ages and works out, its muscle fibers and connective tissues get stronger. At the same time, the fat builds up and adds flavor.
Fats, especially animal fats, are the subject of great debate among scientists, doctors, dietitians, and health faddists. For many years, animal fats were thought to be dangerous and avoided. Scientists now believe that fats, even animal fats, have many health benefits and that eating them in moderation is important for your health. A great deal of interesting research on the subject is going on as I type this. A great deal of research is contradictory. Read more about what I have learned about food and health in this article.
Most of the liquid in meat is water. The reddish color in meat and its juices is not caused by blood. It is the protein myoglobin dissolved in water. Myoglobin is found only in muscle, not in the blood stream. The blood is pretty much all drained out in the slaughter house. If the thing you saw on your plate after cutting a steak was blood, it would be much darker, like real blood, and it would firm up, like real blood. If the fluids were blood, then pork and chicken would be dark red. It’s mostly just water, so let’s stop grossing out our kids, and just call it juice. OK? Every time you call meat juices blood, a bell rings and a teenager becomes a vegan. Click here to Tweet this bit of wisdom.
When animals are alive, the pH of the muscle fibers is about 6. 8 on a scale of 14. The lower the number, the higher the acidity. The higher the number, the more alkalinity and less acidic. At 6. 8, living muscle is just about neutral. When the animal dies, the pH declines to about 5. 5, making it acidic. At this pH, muscle fibers bunch up and squeeze out juice, which is known as “purge.” This is the juice that you see in meat packages; it’s absorbed by the diapers that are put under the meat.
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Pork fat rendering is the process of gently melting solid pork fat to extract lard or tallow. Knowing the right temperature for rendering is key to producing high quality lard or tallow without burning the fat. In this comprehensive guide we’ll cover everything you need to know about rendering temperatures for different types of pork fat.
Why Render Pork Fat?
Rendering pork fat transforms hard fat into a versatile cooking ingredient. Lard and tallow have a high smoke point, making them ideal for frying and baking. Rendering also improves storage life. Pork fat will keep for months in the fridge or over a year in the freezer after rendering. In addition, the mild, meaty flavor of lard and tallow can enhance all kinds of savory dishes.
What is the Smoke Point of Lard?
The smoke point of lard ranges from 360°F to 400°F. This high smoke point means lard and tallow won’t burn or generate free radicals until heated to very high temperatures. For comparison, olive oil has a smoke point around 375°F. Lard’s excellent performance under high heat makes it a top choice for deep frying and pan frying.
What Temperature Does Pork Fat Melt?
Different types of pork fat render at slightly different temperatures. Here are typical rendering ranges:
- Leaf lard: 122°F to 135°F
- Back fat: 122°F to 135°F
- Fatty scraps: 140°F to 212°F
Leaf lard melts at the lowest temperature since it contains less connective tissue. Fatty meat trimmings render at higher temps than pure fat.
Step-by-Step Rendering Instructions
Follow these steps for perfect pork fat rendering every time:
1. Choose the Fat
Opt for the highest quality pork fat available, ideally leaf lard or back fat. Avoid fat with large quantities of skin or meat attached.
2. Cut the Fat
Trim off any remnants of meat or skin, then cut the fat into 1-inch cubes. Smaller pieces render more quickly and evenly.
3. Add Water
Place the chopped fat in a heavy pot and add just enough water to barely cover the bottom, around 1/4 cup water per pound of fat. The water prevents sticking and improves rendering.
4. Cook Slowly
Heat the fat over low heat. Do not allow the temperature to exceed 245°F to prevent burning. Ideal rendering temperature is 180°F to 212°F.
5. Monitor the Process
Keep an eye on the rendering fat, adjusting heat as needed. The fat will gradually melt, separating into liquid lard or tallow and crispy cracklings.
6. Strain and Store
Once fully rendered, strain the fat through a cheesecloth-lined sieve. Store in an airtight container for up to 3 months refrigerated or 1 year frozen.
Oven Rendering Temperatures
You can also render pork fat in the oven. 225°F to 250°F is the ideal oven range for slow, even rendering without burning. Expect the process to take 2 to 4 hours. Monitor regularly and remove cracklings as they brown.
Tallow vs. Lard Rendering Temps
Tallow comes from fatty beef cuts while lard is rendered pork fat. They render at similar temperatures, but tallow has a slightly higher smoke point around 400°F to 420°F. Both can be used for frying, but tallow is better suited for extremely high heat cooking.
Leaf Lard vs. Back Fat
Leaf lard and back fat render beautifully into lard, but leaf lard has a more delicate flavor. Leaf lard comes from the area around the kidneys and renders at a slightly lower temperature than back fat from the pig’s back.
Rendering Fatty Scraps and Trimmings
Bits of meat, skin, and connective tissue require higher heat to fully render. Keep the temperature under 212°F to avoid burning. Expect the process to take longer, requiring frequent monitoring and skimming. Strain well before use.
Signs of Overheating
Avoid these signs of overheated fat:
- Darkening color
- Visible bubbling
- Burnt specks
- Strong odor
If the fat exceeds 250°F, the lard or tallow may have an unpleasant flavor. Discard overheated fat and start again.
Troubleshooting Pork Fat Rendering
Follow these tips if you encounter any issues:
- Fat won’t melt: Increase heat slowly to between 200°F and 212°F.
- Fat is burning: Reduce heat immediately and monitor closely.
- Lard smells unpleasant: The fat was likely overheated. Discard and start over.
- Lard tastes weird: Strain through an extra fine mesh sieve or cheesecloth.
Storing and Using Rendered Pork Fat
Once rendered, lard and tallow can be used for all types of cooking. Store in the:
- Refrigerator for up to 3 months
- Freezer for up to 1 year
Use rendered pork fat for frying, baking, roasting, and more. The mild flavor and high smoke point make it one of the most versatile cooking fats.
Achieving Perfect Results
Now that you know the ideal rendering temperatures for different types of pork fat, you can master the art of making lard and tallow at home. Low, precise heat is key for melting the fat without burning. With the proper technique, you’ll achieve beautiful, creamy lard and tallow with all the wonderful porky flavor to enhance your cooking.
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My meat smells funny, what should I do?
When you take meat out of a vacuum-sealed plastic bag, it may smell a little funny at first, but the smell should go away in a few minutes. If it still smells funny, then chances are it is funny. Throw it out. Remember: when in doubt, throw it out!.
How to Render Lard the RIGHT Way! (10 Must-Do Steps)
What temperature does pork fat render?
Pork fat begins to render when it hits the 130-140 degree range. Before that, it will remain in its solid form. The fat needs to be held at this temperature for several hours in order to render properly. When it’s heated too quickly, the fat will burn instead. Along with oxygen, fat is one of the main sources of energy for muscle tissue.
How to render pork fat?
When it comes to rendering pork fat, the first step is to obtain the pork fat itself. This can usually be obtained from a butcher or from pork products such as bacon or pork belly. It’s important to note that the pork fat should be clean and free from any meat or other impurities. Once you have the pork fat, it’s time to prepare it for rendering.
How long can you keep rendered pork fat?
Yes, you can store rendered pork fat in an airtight container in the refrigerator for up to six months. It can also be frozen for even longer storage. 5. Are there any special considerations for rendering pork fat? One important consideration when rendering pork fat is to keep an eye on the heat.
Can rendered fat be stored at room temperature?
You’ve got rendered fat which can now be stored at room temperature, or better yet, in the refrigerator where it will last virtually forever. Let it cool down completely at room temperature and do not cover it until completely cool.