A Cumbria woman, Fiona Exon, beat odds of more than a trillion to one by finding all six eggs in a single box had double yolks.
She bought a half-dozen box from supermarket Morrisons and had been looking to scramble eggs one recent Sunday morning.
But after starting her preparation, she could only stare in amazement as every egg she cracked contained a double yolk.
The British Egg Information Service said the chances of getting one double yolk in a box of eggs was one in 1,000.
The chances of getting all six double yolks in one box, therefore, more than one in a trillion.
Mrs Exon, from Cumbria, said: "We bought a half dozen eggs from Morrisons and when I started to crack them to make scrambled eggs for a Sunday breakfast I was astounded when the first was a double-yolker.
"I had only ever seen one double-yolk egg before, and that was when I was young.
"Cracking the second I literally gasped when it too was a double."
She added: "When the third was the same I called my partner Hector through to the kitchen and when the fourth was a double, then the fifth we began to feel a little spooked.
"By the sixth double we were just gobsmacked. I had to get my camera and take a picture."
British Egg Information Service spokesman Kevin Coles said British people eat 11 billion eggs each year, or 30 million eggs a day.
Mr Coles said finding six double yolks in a half-dozen box of eggs was extremely rare.
"The chances of an egg coming out with a double yolk are 0.1 per cent," he said.
"It's extremely unusual to find all six eggs together in the one box having double yolks."
Mr Coles said double yolk eggs were common among younger hens, added: "When hens start laying eggs they often produce double eggs between 18 to 24 weeks.
"The double yolk eggs have probably come from the one flock of young hens."
Mr Coles said double yolk eggs were larger, so that explained why they would be grouped together.
Bookmakers William Hill said they were amazed at the find but would shirk taking a bet at odds of 1 trillion to one.
Spokesman Rupert Adams said: "We would never take a bet of six double yolk eggs in the one box at 1 trillion to one because if it did happen we would have egg on our face.
"The highest odds we have given was a legitimate bet of 15 million to one for Gordon Brown to win the 100m sprint in the 2012 London Olympics.
"The only time we would take a bet for one trillion to one is for the end of the world and if that did happen obviously no one would be able to collect it. But in heaven everybody would be winners anyway." Source