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Digital Thermometers:
Stop Guessing!

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Gold BBQ AwardA good digital thermometer keeps me from serving dry overcooked food or dangerously undercooked food. You can get a professional grade, fast and precise splashproof thermometer like the Thermopop (above) for about $24. The Thermapen (below), the Ferrari of instant reads, is about $96. It's the one you see all the TV chefs and all the top competition pitmasters using. Click here to read more about types of thermometer and our ratings and reviews.

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GrillGrates Take You To
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Gold BBQ AwardGrillGrates(TM) amplify heat, prevent flareups, make flipping foods easier, produce great grill marks, keep small foods from committing suicide, kill hotspots, are easier to clean, flip over to make a fine griddle, smolder wood right below the meat, and can be easily removed and moved from one grill to another. You can even throw wood chips or pellets or sawdust between the rails and deliver a quick burst of smoke to whatever is above. Every gas grill and pellet smoker needs them.

Click here to read more about what makes these grates so special and how they compare to other cooking surfaces.

The Smokenator:
A Necessity For All Weber Kettles

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Gold BBQ Award If you have a Weber Kettle, you need the amazing Smokenator and Hovergrill. The Smokenator turns your grill into a first class smoker, and the Hovergrill can add capacity or be used to create steakhouse steaks.

Click here to read more.

The Pit Barrel Cooker

pit barrel c ooker bbqAbsolutely positively without a doubt the best bargain on a smoker in the world.

This baby will cook circles around the cheap offset sideways barrel smokers in the hardware stores because temperature control is so much easier (and that's because smoke and heat go up, not sideways).

Gold BBQ AwardBest of all, it is only $289 delivered to your door!

Click here to read our detailed review and the raves from people who own them.

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Best. Tongs. Ever.

Gold BBQ AwardMade of rugged 1/8" thick aluminum, 20" long, with four serious rivets, mine show zero signs of weakness after years of abuse. I use them on meats, hot charcoal, burning logs, and with the mechanical advantage that the scissor design creates, I can easily pick up a whole packer brisket. Click here to read more.

Amp Up The Smoke

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Gold BBQ AwardMo's Smoking Pouch is essential for gas grills. It is an envelope of mesh 304 stainless steel that holds wood chips or pellets. The airspaces in the mesh are small enough that they limit the amount of oxygen that gets in so the wood smokes and never bursts into flame. Put it on top of the cooking grate, on the burners, on the coals, or stand it on edge at the back of your grill. It holds enough wood for about 15 minutes for short cooks, so you need to refill it or buy a second pouch for long cooks like pork shoulder and brisket. Mine has survived more than 50 cooks. Click for more info.

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The Best Steakhouse Knives

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smoke ring

Mythbusting The Smoke Ring: No Smoke Necessary!

"I believe in pink. I believe that laughing is the best calorie burner. I believe in kissing, kissing a lot. I believe in being strong when everything seems to be going wrong. I believe that happy girls are the prettiest girls. I believe that tomorrow is another day and I believe in miracles." Audrey Hepburn

By Meathead Goldwyn

Smoked meats often have a pink layer directly below the surface, nestled neatly under the bark. Called the smoke ring, it has long been an emblem of great barbecue. Backyarders know they have arrived when they make their first smoke ring. BBQ judges eat with their eyes and look for smoke rings at competitions.

Alas, as with so many things barbecue, there is a lot of misinformation about the smoke ring out there, and anybody who tells you that good barbecue needs a smoke ring is blowing smoke. The AmazingRibs.com science advisor Dr. Greg Blonder, has done extensive research for us on the subject and has pinned down the facts, among them, you don't even need smoke to make a smoke ring!

It's all about the myoglobin

Smoke can be described, a bit simplistically, as tiny particles that we can see mixed with water vapor, and gases (click here to read more about smoke). Blonder has proven that the smoke ring is an interaction between a pink protein in meat named myoglobin with the gases nitric oxide (NO) and carbon monoxide (CO). NO and CO are made by the combination of carbon and nitrogen with oxygen during the combustion of wood or charcoal. The white billowy stuff has nothing to do with the process.

Here's how it works. Muscles use oxygen and other compounds as a fuel. A protein called hemoglobin carries oxygen from the lungs through the blood stream to the walls of the muscle fibers where it passes into the cells and is glommed onto by myoglobin. Myoglobin is suspended in water and stores the oxygen until it is needed. When an animal is slaughtered, the blood and hemoglobin are drained, but much of the myoglobin water, called myowater, remains trapped in the fibers. It accounts for about 75% of the weight of meat and much of the moisture we feel when we eat. When you buy meat, the pink liquid in the package is not blood, it is myowater.

Myoglobin is rusty colored because it has an iron compound called a heme and it is responsible for most of the color of meat. Some muscles have more myoglobin than others and that makes them pinker. Beef has more than turkey dark meat which has more than turkey white meat. But all three give up pink juice. Dr. Blonder explains that "In high oxygen environments, like air on the surface of freshly cut meat, myoglobin is bright red. In zero oxygen environments, like deep inside a steak, myoglobin is purplish. In low oxygen environments, as in week-old packaged meats, myoglobin is brown. As you might imagine, this color change is reversible because myoglobin is designed to continually shuttle oxygen back and forth through the cell wall. So a raw gray meat surface is reversible to pink on exposure to air." Cut open a package of gray steak and it will often pink up with exposure to oxygen. Cut open a steak on the grill to see if it is done, and when you bring it to the table, it will be a different color ans oxygen combines with the myoglobin (yet another argument for digital thermometers).

NO and CO are not very stable so they willingly mix it up with wet meat juices and basting liquids on the surface. These dissolved gases react with the iron in the myoglobin and prevent it from changing color when the meat is cold. Some meat packers are now injecting CO into the packaging to keep the meat bright pink longer.

Like many proteins, myoglobin changes color permanently when it breaks down after exposure to heat. In beef the meat goes from purple to red to pink to gray at very specific temperatures, and that is what defines rare, medium rare, well done, etc. Once myoglobin breaks down, at about 170°F in beef and 100°F in tuna, the game is over, it cannot return to pink.

While meat is starting to cook, if NO or CO land on the surface and dissolve into the meat, they "fix" the color pink while the rest of the meat heats up and goes to gray. But NO and CO cannot diffuse very far beyond the surface before the meat beneath it heats up, dooming the myoglobin in the interior to a colorless fate. As a result, the pink forms a thin layer, the smoke ring, which usually only goes about 1/8" deep, although, under some circumstances, it can go up to 1/2" deep.

This chemical reaction is similar to the one that occurs when you cure meat by sprinkling it with a curing salt containing sodium nitrite. These are the salts that give bacon, hot dogs, and corned beef their characteristic pink color. They lock in the pink color. Sprinkle a little on meat and bake it in an indoor oven and voila, smoke ring. So you don't need smoke to make a smoke ring, you just need NO or CO. To prove the point Dr. Blonder placed pork tenderloins in five kinds of filter bags: Parchment paper, a kraft paper bag, butcher paper, a Reynold's turkey basting bag, and a HEPA (high-efficiency particulate air) filter you might buy for a shopvac. They are porous enough to let gases through, but not the much larger smoke particles.

smoke rings

smoke ring in bags

As you can see, all four meats had distinct smoke rings. So no puffy white clouds are necessary. The process is very complex and depends on a number of variables including humidity, oxygen levels, combustion temp, how dry the wood is, and even the pH of the meat itself. But NO and CO are crucial ingredients and how much you get depends a lot on your smoker. Here's a table Dr. Blonder created from actual readings he took with sensitive equipment (and no he did not start a savannah fire, he simulated it in a fire ring in his yard).

Fuel
NO in exhaust
Savannah grass fire, near surface
250 ppm
Roaring Kingsford charcoal briquets, no wood
100-200 ppm
Roaring wood fire (depends on wood)
50-200 ppm
Pellet smoker at 225°F
25-50 ppm
Roaring lump charcoal (depends on wood and brand)
10-70 ppm
Charcoal briquets, long slow cook at about 225°F
<20 ppm
Propane smoker, hot flame, no wood
<20 ppm
Smokenator, no wood (indirect Weber Kettle with briquets)
<10 ppm
Electric smoker with wood lumps
<2 ppm
Propane grill, no wood
<2 ppm

 

This data is quite startling. Plain charcoal briquets, roaring hot, produce about the same amount of NO as plain wood and significantly more than lump charcoal. Lump charcoal is almost pure carbon, and thus deficient in nitrogen compared to briquettes which contain partially carbonized sawdust and actual coal dust, along with other additives. In addition, lump produces less NO because the irregular shapes interlock and block airflow, while briquets, with their grooved and rounded tops and bottoms allow more oxygen in so they actually burn hotter, contrary to popular opinion, and produces more NO.

A propane grill burns extremely efficiently producing little more than carbon dioxide and water as byproducts. Electric smokers are low power, produce little energy compared to full out combustion, and there is little airflow since oxygen is not sucked in as a fuel, so the wood smolders rather than burning, producing little NO. Instead of burning at 1,600°F as in a top of the line offset smoker, wood hunks in an electric smolder between 400°F and 900°F, according to Blonder.

fat in brisket smoke ring

To prove it, in a complicated and dangerous series of experiments, Dr. Blonder cooked meat in a container filled with an NO solution, and another in CO. Both developed smoke rings.

The thickness of the smoke ring also depends on the fat cap. If you leave on the layer of fat, NO and CO will penetrate into it, but the fat doesn't contain myoglobin, so it doesn't have any pink to be fixed. So the smoke ring will form under the fat if the gases penetrate that far. But if the fat layer is thick, the NO and CO will not get through and there will be no smoke ring. Yet another reason to remove most of the fat.

The locking of the myoglobin color starts almost immediately if you have a good stable clean fire. If you have a charcoal wood, or pellet fire, try this: Put a slab of ribs on at 225°F. After 30 minutes, move it indoors and finish cooking. There will be a fine looking smoke ring. After just 30 minutes exposed to NO and CO!

It has long been known that smoke rings stop growing as the cook progresses. The point at which they stop seems to be when the myoglobin hits about 170°F depending on a number of variables. At that temp it has broken down so far that the pink color can no longer be locked in. But basting or spritzing the surface cools it and allows it to grow. So the size of the smoke ring as well as the sharpness of the edge is connected to how fast the meat heats. Yet another reason to cook low and slow.

All this Blonder research busts a bunch of myths. The smoke ring is not cause by the billowy white stuff, it is caused by gases. It is not enhanced by paprika. It is enhanced by basting. It is not due to nitrites like the pink color in cured meats. There is no time limit on smoke absorption. The ring stops when the meat hits about 170°F and myoglobin loses its oxygen retaining ability, not 140°F. Salt has little to do with it. Some people think it does because it is right below the surface and that is where the spices and smoke flavors live. They are fooled by the bark.

How to get a smoke ring

Although it adds no flavor, the pink band does look cool, it gets the saliva flowing, and it gives your meat a look of authenticity, so here's what we know about how to get a good smoke ring:

Moisture. Keep the surface wet by basting or spritzing it with a thin water based mop. In many parts of the country mopping with vinegar based liquids is popular. Many people spritz with apple juice, which also has fructose which can help with browning. Blonder explains: "First, when water evaporates from the surface of the meat it cools the meat and this enhances condensation of NO. Second, the water is 'sticky' and grabs onto passing smoke chemicals. And third, it delays the formation of a dense bark which impedes absorption of smoke chemicals."

When smoke roasting, moist meat holds onto smoke more readily than dry meat. Less smoke sticks as the cooking continues because the surface of the meat begins to dry. For this reason putting a pan of water in a smoker helps create a smoke ring because the evaporating water condenses on the meat. In fact some smokers, called water smokers, have water pans built in. The Weber Smokey Mountain is the best known of this breed.

As smoke particles and combustion gases land on the surface of meat, especially cool moist meat from the fridge, they condense, dissolve, and some are moved deeper into the meat by diffusion and absorption. The cells are simply seeking equilibrium. The process is the same as when someone lights a cigar in a room. All the smoke starts out near the cigar, but eventually it spreads throughout the room as it achieves equilibrium. After a while it penetrates clothes, furniture, and even food. Because it is water soluble, cigar smoke will get into wet things first, like your wife's eyes. Before long you and your cigar will be seeking equilibrium in the garage.

Cook low and slow. When meat is cooked hot, the myoglobin turns brown faster, so the NO and CO don't penetrate deeply before the meat changes color. When cooked slowly, the muscle proteins finish breaking down before the naturally pink myoglobin denatures and so the meat remains pink. You can occasionally see this phenomenon in braised meat like a beef stew. It may have been cooked for hours in a liquid at low temps, yet the meat will still be slightly pink inside.

Don't use electric smokers. That is partially because the wood smolders at a low temp in electrics, and high temps are required to create the NO and CO. Experts at cooking in electric smokers sometimes add a charcoal briquet as well as wood to create the correct atmospheric conditions for a smoke ring. Some of these briquets actually contain powdered sodium nitrates, which enhance ring formation. But in general, a vigorous charcoal or wood fire at just the right temperature, produces the deepest ring and the best meat. Click here to learn more about wood and smoke.

Remove the fat. NO and CO can penetrate fat, but if the underlying meat changes color before they get to it, you won't have a smoke ring. There are many of other good reasons to get rid of the fat cap.

Dr. Blonder, the scientist, in a poetic moment observes that "Myoglobin, a molecule essential for life, is as fragile as life itself. It can breathe in gases, and react by changing color. It can die when it overheats. And like every individual, it has its own, unique personality. Understanding myoglobin is a key to understanding how meat cooks, looks and tastes." Click here to read more of the science and Dr. Blonder's tests.

This page was revised 8/9/2014


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About this website. AmazingRibs.com is all about the science of barbecue, grilling, and outdoor cooking, with great BBQ recipes, tips on technique, and unbiased equipment reviews. Learn how to set up your grills and smokers properly, the thermodynamics of what happens when heat hits meat, as well as hundreds of excellent tested recipes including all the classics: Baby back ribs, spareribs, pulled pork, beef brisket, burgers, chicken, smoked turkey, lamb, steaks, barbecue sauces, spice rubs, and side dishes, with the world's best buying guide to barbecue smokers, grills, accessories, and thermometers, edited by Meathead.

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