Why Do Crabs and Lobsters Turn Red When You Cook Them?

iStock / Creativeye99
iStock / Creativeye99

While they might be bright red when they hit your dinner plate, crabs and lobsters are usually brown, olive-green or gray when alive and in the wild (at least in the mid-Atlantic U.S.; crustaceans farther south come in a variety of vibrant colors). The dramatic color change during cooking has to do with the way certain biochemicals inside the shellfish react to heat.

Lobsters and crabs have a pigment called astaxanthin in their shells. Astaxanthin is a carotenoid pigment: absorbing blue light and appearing red, orange or yellow in color. While the crustaceans are alive, astaxanthin lies wrapped in the tight embrace of a protein called crustacyanin. The protein holds the pigment so tight, in fact, that it’s flattened and its light-absorption properties are changed. The astaxanthin-crustacyanin complex then winds up giving off a blue-green color.

These biochemical cuddle buddies get separated when a crab or lobster is cooked. Crustacyanin is not heat-stable, so introducing it to a boiling pot of water or a grill causes it to relax its bonds with astaxanthin, unravel and let the pigment’s true bold red color shine through.

An estimated 1 in 100 million lobsters are albino and don’t have any pigments in their shell. They’ll go cooked to the dining room the same color they went live into the pot: a ghostly gray-white.

Shrimp also have carotenoid pigments in their shells and flesh, and these are also hidden until they’re released by heat. So how do flamingoes, with diets heavy with carotenoid proteins but which usually don’t have kitchen access, take on the bright pink of their dinners’ pigments without cooking them? The proteins that mask the pigments not only unravel in the presence of heat, but also dissolve thanks to the acids and fats inside flamingos during digestion. The freed proteins then give birds’ feathers a soft pink hue.

General Mills Is Recalling More Than 600,000 Pounds of Gold Medal Flour Over E. Coli Risk

jirkaejc/iStock via Getty Images
jirkaejc/iStock via Getty Images

The FDA recently shared news of a 2019 product recall that could impact home bakers. As CNN reports, General Mills is voluntarily recalling 600,000 pounds of its Gold Medal Unbleached All-Purpose Flour due to a possible E. coli contamination.

The decision to pull the flour from shelves was made after a routine test of the 5-pound bags. According to a company statement, "the potential presence of E. coli O26" was found in the sample, and even though no illnesses have been connected to Gold Medal flour, General Mills is recalling it to be safe.

Escherichia coli O26 is a dangerous strain of the E. coli bacterium that's often spread through commercially processed foods. Symptoms include abdominal cramps and diarrhea. Most patients recover within a week, but in people with vulnerable immune systems like young children and seniors, the complications can be deadly.

To avoid the potentially contaminated batch, look for Gold Medal flour bags with a "better if used by" date of September 6, 2020 and the package UPC 016000 196100. All other products sold under the Gold Medal label are safe to consume.

Whether or not the flour in your pantry is affected, the recall is a good reminder that consuming raw flour can be just as harmful as eating raw eggs. So when you're baking cookies, resist having a taste until after they come out of the oven—or indulge in one of the many edible cookie dough products on the market instead.

[h/t CNN]

The World's Spiciest Chip Is Sold Only One to a Customer

Paqui
Paqui

If you’ve ever wondered what it would be like to get pepper-sprayed directly in your mouth, Paqui Chips has something you can’t afford to miss. Following the success of their Carolina Reaper Madness One Chip Challenges back in 2016 and 2017, Food & Wine reports that the company has re-released the sadistic snack. Continuing their part-marketing gimmick, part-public safety effort, the Reaper chip won’t be sold in bags. You just get one chip.

That’s because Paqui dusts its chips with the Carolina Reaper Pepper, considered the world’s hottest, and most (attempted) consumers of the chip report being unable to finish even one. To drive home the point of how hot this chip is—it’s really, extremely, punishingly hot—the chip is sold in a tiny coffin-shaped box

Peppers like the Carolina Reaper are loaded with capsaicin, a compound that triggers messages of heat and pain and fiery consumption; your body can respond by vomiting or having shortness of breath. While eating the chip is not the same as consuming the bare, whole pepper, it’s still going to be a very uncomfortable experience. For a profanity-filled example, you can check out this video:

The chip will be sold only on Paqui’s website for $6.99 per chip or $59.90 for a 10-pack. The company also encourages pepper aficionados to upload photos or video of their attempts to finish the chip. If it becomes too much, try eating yogurt, honey, or milk to dampen the effects.

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