YOU can buy boxes of BLUE chicken eggs in Aldi and people can't make their mind up about them.

Normally, eggs bought in supermarkets typically have pale brown or white shells but the boxes of six eggs from Aldi are blue.

5 Facebook group member Malcolm was confused by the blue eggs his wife had bought from Aldi Credit: Malcolm Cowling/Facebook

Malcolm Cowling from Selby in Yorkshire posted the photo to money saving Facebook group, Reduce Your Supermarket Spend, after his wife bought a box from the store.

He'd never seen them before so he took to the group to see what other people thought about them.

He wrote: "Aldi are doing blue eggs never seen them before my wife had one this morning said she likes them any one had them [sic]."

One user wrote that the eggs made her feel "nauseous" whilst another wrote that she'd "never seen these before."

5 Boxes of British Blue eggs aren't new to the store but Malcolm's post has sparked a debate about which colour eggs taste better Credit: Malcolm Cowling

5 Malcolm Cowling posted on the money saving Facebook group because he was confused having never seen them before Credit: Facebook

While the boxes of The British Blue Eggs aren't new to the German supermarket the post prompted a debate over whether blue eggs taste better.

Some Facebook group members insist that there is a difference, swearing that they have "more orange yolks" and a better flavour" than brown eggs.

But not everyone is convinced, with chicken owner Katie Ryan posting: "Apart from the colour of the shell they are EXACTLY the same as any other egg !!!!

"No different to a white or brown egg Just shops think they are fancy so charge you a premium to buy them."

So why are some chicken eggs blue? And do they cost more?

The colour of the eggs shells depend on what breed of chicken laid them.

Cream Legbar, Araucana, Arkansas Blue and Whiting True Blue are among the handful of hens that lay eggs who's shells are tinted blue.

5 You can buy posher blue eggs by Heritage Breeds from Ocado but they cost nearly 40p more Credit: Ocado

These chickens cost more to buy and that has a knock on effect on the egg price on the shelf.

Malcolm told the Sun Online that he bought the box of six eggs from Aldi for £1.49 - and we've asked the supermarket if they are a special buy or available all year round.

Other shops also stock blue eggs but they cost more. You can buy a six pack of Bluebell Araucana eggs from Tesco for £1.90 or an even posher box of Heritage Breeds Royal Legbar Free Range Blue Hen Eggs from Ocado for £2.29.

Waitrose stocks a box of Clarence Court blue hen's eggs for £2.40 for six making them 90p more expensive than the ones from Aldi.

If you are on the hunt for blue eggs, the ones from Aldi are better value for money although a standard box of free range eggs costs much less at 89p a pack from the supermarket.

Do blue eggs taste better and do they have yellower yolks?

The colour of an egg yolk depends on what the hens who laid them have been eating.

Chickens that have been fed on a diet of fresh, natural greenery with yellow pigments like marigolds will produce eggs with much more yellow yolks. This is why many people prefer the taste of free range eggs.

5 Araucana hens are one of the breeds that produce eggs with blue shells Credit: Credit: BIOSPHOTO / Alamy Stock Photo

Eggs produced during the winter months will have paler yolks because they have to rely on feed.

Fairburns Eggs who produce the British Blue eggs say they feed their hens on a diet that "consists of a grain mix with extracts from brightly coloured flowers" which produces a "rich tasting natural yolk".

So really it's not the colour of the shell that makes the yolk taste better, it's the hen's diet.

It is illegal for breeders to add artificial colourants to a hen's food.

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What other birds lay blue eggs?

You may also spot blue eggs duck and quails and on supermarket shelves.

Starlings and black birds also lay blue eggs but you can't buy them because the eggs are protected.

Plenty of people believe that eggs should be keep in a cool and dry cupboard rather than the fridge, but according to a storage expert, the fridge is the best place for them.

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But where you place them in the fridge is crucial.

Vlatka Lake from Space Station says that the worst place to put eggs is in the plastic egg rack that is either built in, or comes as an insert with fridges.

This is because it will be subjected to a series of sudden temperature changes as the door opens and closes, and that makes them go rotten quicker.

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