We once had a larger than normal egg from a local source. When we opened it, it was a normal single yolk egg with a tiny otherwise fully formed shelled egg inside it. The tiny egg had a tiny single yolk.

Some places sell cartons of eggs specifically branded as double-yolks.

https://www.homesteadeggs.com/product-page/double-yolk-carton

I've been looking at too many maps of china this week…

I’ve gotten a few double-yolks from my chickens, mostly when they don’t lay for a day or two and pop out a really big one.

I got one with a spiral pattern in the shell the other day, like a streak of the wrong material got laid down during development or something. I’m not going to eat it, because I’m pretty sure it’s no good, but it’s cool.

And one of my quail that normally lays brown spotted eggs laid a completely white one last month.

Eggs are weird.

Meh, it can be selected for. My parents had double yolk eggs on the regular for years, until the only supplier in my corner of the country retired. Now we're stuck with boring single yolk eggs like everyone else ._.

I think they tend to put them together. If I'm remembering correctly, it's a common practice to put similar eggs together rather than adding them to cartons at random, so consumers have more uniform cartons of eggs.

I had one carton a few months ago that was like 10 double -yolk eggs and ended up looking it up.

If you buy the XL eggs from the local farm shop, you've got a good chance to get some. I even got twins in all eight eggs once.

I'm never sure how to feel about these. Is it a good thing? I feel like it's just extra cholesterol, and it throws off the regular yolk to egg white ratio. I almost feel like it's not a win.

My neighbor's had chickens and there were a couple who laid double yolks on the regular. They make the best scrambled eggs.

supposedly its 1:1,000

Happens regularly where I live, I think it's because the chicken was younger than usual?

This happened many, many years ago as you can tell bythe quality of the image (almost certainly taken on a point and click, then scanned witha 10+ year old scanner)

I find that it does seem to happen more often within one batch of eggs, vs different batches. Like if I get one double yolk in a carton, I'd at least not be that surprised if there's another in the same carton. Maybe it has to do with how they sort the eggs, idk

my parents once bought eggs from a guy on the side of the road claiming that they had 3 egg yolks. it was true. i wonder what the chickens could look like (or if they're visibly different at all, maybe the eggs were just very well selected).

You must be yolking

a couple of days ago I had an egg with NO yolk!

I believe that some chickens are much more likely to produce them so it's not as unusual that if you find one to find another one in the same batch

I once watched a guy who was working a Macca's kitchen with me manage to get 11 in a row when we were doing breakfast