What's Up With Those Green Potato Chips You Sometimes Find?

iStock/milla1974
iStock/milla1974

??Well, they're not dyed for St. Patrick’s Day. These are just from potatoes in which chlorophyll had started to form. This can happen when potatoes, which grow underground, are exposed to too much light in the field or factory, in storage, on the store shelf, or in your home.

The USDA’s “Standards for Grades of Potatoes” consider a potato that’s more than 5 percent green to be damaged, and potato lots that contain them will be graded below US Grade #1. That means most green potatoes never even make it to market.

You’ll still see some every now and again, either in whole or chip form, if conditions in the potato chip plant, the grocery store, or your kitchen are right. Fluorescent lighting and a room temperature of at least 68°F can get the greening process going in a raw potato in just three to five days, and some varieties of potato will start turning in as little as 12 hours even under low incandescent lighting.

By itself, chlorophyll is nothing to be worried about; it’s tasteless and nontoxic. In the process of a potato going green, though, conditions are also right for it to synthesize more of a glycoalkaloid (alkaloid + sugar) poison called solanine, which potato plants produce in their leaves, stems, sprouts and flesh as a defense against insects and other predators. Ingesting solanine can cause nausea, diarrhea, vomiting, stomach cramps, burning sensations in the throat, dysrhythmia, headaches, fever, hallucinations, jaundice, paralysis and death. Toxic levels for people are around one one-hundredth of an ounce for a 200-pound person, who would have to eat about 20 pounds of normal whole potatoes in one day to get sick. With very green potatoes, where the solanine level can increase ten-fold, only two pounds of spuds could leave you ill.

As for potato chips, solanine formation is localized near the potato's skin, usually no deeper than 3 mm. As they're peeled for processing, most of the flesh making up those three millimeters is typically removed. Whatever flecks of green are left are not going to be enough to do anything to you. So, go ahead - finish the whole bag if you want.

What About Dark Brown Potato Chips?

A different matter altogether. Brown potato chips are the result of potatoes being stored too long at low temperatures and accumulating excess sugar. When a potato chip is baked or fried, the sugar reacts with amino acids to produce that beautiful golden-brown color, but too much sugar leads to a very dark brown, almost burnt-looking, color and a slightly different, off flavor.

Take Advantage of Amazon's Early Black Friday Deals on Tech, Kitchen Appliances, and More

Amazon
Amazon

This article contains affiliate links to products selected by our editors. Mental Floss may receive a commission for purchases made through these links.

Even though Black Friday is still a few days away, Amazon is offering early deals on kitchen appliances, tech, video games, and plenty more. We will keep updating this page as sales come in, but for now, here are the best Amazon Black Friday sales to check out.

Kitchen

Instant Pot/Amazon

- Instant Pot Duo Plus 9-in-115 Quart Electric Pressure Cooker; $90 (save $40) 

- Le Creuset Enameled Cast Iron Signature Sauteuse 3.5 Quarts; $180 (save $120)

- KitchenAid KSMSFTA Sifter with Scale Attachment; $95 (save $75) 

- Keurig K-Mini Coffee Maker; $60 (save $20)

- Cuisinart Bread Maker; $88 (save $97)

Home Appliances

Roomba/Amazon

- iRobot Roomba 675 Robot Vacuum with Wi-Fi Connectivity; $179 (save $101)

- Fairywill Electric Toothbrush with Four Brush Heads; $19 (save $9)

- ASAKUKI 500ml Premium Essential Oil Diffuser; $22 (save $4)

- Facebook Portal Smart Video Calling 10 inch Touch Screen Display with Alexa; $129 (save $50)

- Bissell air320 Smart Air Purifier with HEPA and Carbon Filters; $280 (save $50)

Video games

Nintendo

- Legend of Zelda Link's Awakening for Nintendo Switch; $40 (save $20)

- Marvel's Spider-Man: Game of The Year Edition for PlayStation 4; $20 (save $20)

- Marvel's Avengers; $27 (save $33)

- Minecraft Dungeons Hero Edition for Nintendo Switch; $20 (save $10)

- The Last of Us Part II for PlayStation 4; $30 (save $30)

- LEGO Harry Potter: Collection; $15 (save $15)

- Ghost of Tsushima; $40 (save $20)

Computers and tablets

Microsoft/Amazon

- Apple MacBook Air 13 inches with 256 GB; $899 (save $100)

- New Apple MacBook Pro 16 inches with 512 GB; $2149 (save $250) 

- Samsung Chromebook 4 Chrome OS 11.6 inches with 32 GB; $210 (save $20) 

- Microsoft Surface Laptop 3 with 13.5 inch Touch-Screen; $1200 (save $400)

- Lenovo ThinkPad T490 Laptop; $889 (save $111)

- Amazon Fire HD 10 Tablet (64GB); $120 (save $70)

Tech, gadgets, and TVs

Apple/Amazon

- Apple Watch Series 3 with GPS; $179 (save $20) 

- SAMSUNG 75-inch Class Crystal 4K Smart TV; $998 (save $200)

- Apple AirPods Pro; $199 (save $50)

- Nixplay 2K Smart Digital Picture Frame 9.7 Inch Silver; $238 (save $92)

- All-New Amazon Echo Dot with Clock and Alexa(4th Gen); $39 (save $21)

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What Is My Turkey Wearing Frilly Paper Hats On Its Legs?

All dressed up and nowhere to go.
All dressed up and nowhere to go.
Matt Cottam via Flickr // CC BY-NC-ND 2.0

Donning a chef’s hat while you cook Thanksgiving dinner is one thing, but sticking a tiny one on the end of each crispy turkey leg seems like it might be taking the holiday a bit too far.

Over the years, these traditional paper coverings have been called many creative names, including turkey frills, turkey booties, and even turkey panties. And while they’ve fallen out of fashion in recent decades, they originally served a very specific purpose. According to 19th-century writer John Cordy Jeaffreson, paper trimmings gained popularity in the 17th century as a way for women to keep their hands clean while they carved meat.

“To preserve the cleanness of her fingers, the same covering was put on those parts of joints which the carver usually touched with the left hand, whilst the right made play with the shining blade,” he explained in A Book About the Table in 1875. “The paper-frill which may still be seen round the bony point and small end of a leg of mutton, is a memorial of the fashion in which joints were dressed for the dainty hands of lady-carvers, in time prior to the introduction of the carving-fork.”

When etiquette books started encouraging "lady-carvers" to use carving forks, the paper didn’t become obsolete—it just got frillier. During the 19th and 20th centuries, chop frills were a cute and classy way to conceal the unsightly leg bones of roast turkey, lamb, chicken, or any other bird. “Dress up any leggy food with them for parties or the children’s birthdays,” Iowa’s Kossuth County Advance wrote in 1951. “They will be thrilled.”

If you’d like to dress up a leggy food or two this Thanksgiving, here are some instructions for making your own chop frills, courtesy of HuffPost.

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