Why Some Cold Cuts Make Iridescent Meat Rainbows—and Why They're Still OK to Eat

Kirill Ignatyev, Flickr // CC BY-NC 2.0
Kirill Ignatyev, Flickr // CC BY-NC 2.0

We eat with our eyes first, and sometimes what we see on our plate turns us off a meal altogether. Take so-called “meat rainbows”: They happen when a slice of deli meat takes on an iridescent shimmer reminiscent of an oil puddle in a parking lot—a.k.a. not something you want on your sandwich. Despite giving a whole new meaning to the phrase "mystery meat," the odd discoloration is perfectly safe to eat, as physicist Dave McCowan at the University of Chicago explained for The Takeout.

The colorful sheen on a slice of roast beef or pastrami isn’t a sign of spoilage or chemical additives—it’s actually a result of the way the meat is cut. Slicing meat “against the grain” means cutting through, rather than parallel to, the bundles of fibers composing the meat’s musculature. This makes for a more tender bite, and it also leaves a grid of evenly-spaced meat fibers. In the right light, this surface lends itself to something called “diffraction.”

Diffraction occurs when light hits a repeating pattern of nooks and crannies. As the white light bounces off the grooves in the meat, it separates into a spectrum of distinct colors. Some of these colors are amplified, creating a mother-of-pearl appearance when viewed together. This is the same effect we see on the backs of CDs and DVDs.

Another possible culprit behind your rainbow meat is thin-film interference. This is sometimes present in meat with a thin layer of oily fat on the surface. The film affects the light passing through it in such a way that only some of the colors in the spectrum come through, hence the rainbow. This phenomenon produces a sheen closer to that of bubbles or oil slicks than laser discs.

Why do meat rainbows only seem to show up in deli slices, not raw cuts? The answer lies in the curing process. A cured ham is likely greasier than a raw pork cutlet, which makes thin-film interference more likely. The muscle fibers in cured and cooked meats are also more tightly packed together, producing the rigid grid necessary for diffraction.

Color also plays a role. Iridescent shimmers are easier to spot on darker meats like beef and some pork—so if you’re eating a slice of turkey from the deli, it could be covered in meat rainbows you don’t notice. We’ll let you decide if that’s a positive thing.

[h/t The Takeout]

KFC's New Firelog Makes Your House Smell Like Fried Chicken

KFC
KFC

The classic yule log has received updates from Star Wars, Nick Offerman, and Lil Bub over the years. This holiday season, why not stoke your fireplace with a log from the folks at KFC? As KRON reports, the fast food chain has produced its own firelog that releases the scent of Kentucky fried chicken when ignited.

The KFC 11 Herbs and Spices log is the best way to fill your house with delectable fried chicken smells without ordering takeout. Made in collaboration with Enviro-Log, it contains 100 percent-recycled materials and burns for up to three hours. KFC warns buyers that burning the log "may result in a craving for fried chicken," and that it "may attract bears or neighbors who are hungry." Despite the mouthwatering aroma, the KFC firelog is not safe to eat.

KFC and Christmas may seem like an odd pairing, but it's an annual holiday tradition in other parts of the world. In Japan, KFC has been a Christmastime staple for decades, with customers placing orders for buckets of "Christmas chicken" months ahead of the holiday.

The KFC log went on sale for $19 on Thursday, December 14, and it's already sold out from the online store, but keep checking back to see if they've restocked them.

It likely won't be the last scented novelty product we see from the brand: KFC has previously released a candle, nail polish, and sunscreen all made to smell like its famous fried bird.

[h/t KRON]

Where to Score Free Treats For National Cupcake Day

iStock.com/RuthBlack
iStock.com/RuthBlack

December is a magical time of year, and not just because of all the winter holidays. A few days on the calendar this month cater to those of us with a sweet tooth, and we can’t say we’re complaining. National Cookie Day fell on December 4, followed by National Brownie Day on December 8, and we still have National Cupcake Day to look forward to tomorrow, December 15. Because if you’re already planning to indulge in Christmas cookies and cake, why not go all out?

The icing on the cake is that a few bakeries across the country will be handing out free cupcakes tomorrow. Sprinkles Cupcakes will be giving away a limited edition strawberry cupcake with rainbow sprinkles to the first 100 visitors at each of its bakeries, which are located in California, Nevada, Arizona, Texas, Illinois, Florida, New York, and Washington, D.C. The bakery will also be doing “impromptu cupcake drop-offs” around New York City tomorrow.

Baked by Melissa also promises customers a free cupcake of their choosing at any of its 14 outlets in the New York City region, according to Metro. The company will also post information about a cupcake giveaway to its Instagram page tomorrow, and you can participate by tagging a friend in the comments. Two winners will receive a “Superstar” pack of 50 cupcakes.

If you happen to live in Cleveland, LaBella Cupcakes is taking a unique approach to the holiday and launching a scavenger hunt at 10 a.m. tomorrow. It will take participants to 10 historic locations around the city, and the person who solves the clues the fastest will take home a dozen free cupcakes. Check out the company's Instagram and Facebook pages for more details. 

There’s also a chance one of your local, non-chain bakeries will be hosting a promotion, so it’s worth visiting their website or social media pages to see if there are some freebies you can take advantage of. 

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