A British retailer is to begin selling boxes of double-yolk eggs.
Marks and Spencer will start selling the packs of six free range eggs this weekend at £2.75 each.
Around 0.1 per cent of eggs have double yolks in them; the oddity is caused by a hormonal imbalance in young chickens.
The eggs for the special boxes will be sourced using a process known as “candling” – shining a bright light on each egg to show the silhouette of the yolks inside.
M&S product developer Ali Rodham said: “We're really excited to be selling double yolkers. We think they're cracking, and we're sure our customers will too.
The alternative burgers
The alternative burgers
1/10 Black 'Kuro' burger
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2/10 Red burger
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3/10 ‘The Glamburger’
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4/10 Doughnut burger
Why use buns when you have doughnuts? You can find these calorific sweet/savoury delights in America, also known as the 'Luther Burger'.
5/10 Ramen burger
Fried ramen noodles replace the traditional bun here, which, when introduced at a Brooklyn food market, sold out in hours.
6/10 Pizza burger
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7/10 Lasagna burger
This invention from Philadelphia’s PYT sees deep-fried lasagna replace the buns.
8/10 Holy cow
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9/10 The Impossible Cheeseburger (Veggie burger)
Don't want to eat meat but enjoy the taste of seared carcass? The Impossible Cheeseburger might be the cheeseburger for you, using plants to make "the best meats and cheeses you’ll ever eat."
10/10 The 'Zinger Double Down King' burger
KFC's new meat beast burger is a bun-less creation with fried chicken acting as buns, released only in Korea so far.
“Perfect for people who think the yolk is the best bit of the egg, double yolkers are not only delicious, but they are healthy too.”
The yolk of chicken eggs is rich in vitamins B12, B6, A, K, E and folate; yolks are one of the few foods to naturally contain vitamin D.
Yolks are also rich in nutrients such as calcium, magnesium, potassium, sodium, selenium and iron.