Centuries-old eggs are harmful to health

How do you make centuries-old eggs?


I can't really comment on where you went wrong, but I just opened (about an hour ago) a couple of my first attempted stacks (starting 7/1, washed and wrapped in plastic wrap 11/07, first opened 7/29. ) with the following results; 1. Whites were gelled but not as dark as expected. 2. Part of the yolk had turned a dark color. 3. The remaining yolks began to solidify. Still buying pale / yellowish. 4. No terrible smell as such. So it seems that my results are kind of an intermediate route to what I expect from a "pidan". I will open others every few days to see how a longer ripening time affects the end result.

I made the brine solution simply by slowly adding the lye / salt to boiling (removed from the stove) water and stirring. I didn't cook the mixture any further as the lye is supposed to heat the solution if it is added anyway.

Just keep trying, I suppose.

Edit: 08/19/17 A longer ripening period did not seem to affect the appearance of the "Pidan", as the gelled white is still an extremely pale amber. While the resulting egg wasn't what I expect from a commercial pidan, it was perfectly edible.

I am inclined to suspect / conclude that it is the addition of wood ash in the traditional recipes (tea leaves in some of the other articles I've read) that adds extra color to the final product, resulting in the traditional dark / black color, that we've gotten to expect from a commercial pidan.


Could you clarify which country you are in? In one of the answers above, it was mentioned that US eggs have had their cuticles removed, which has a major impact on the permeability of the egg shell.


I am in the UK. I used eggs straight out of the box without washing them. I found a link that said the egg proteins (white) will not coagulate if the concentration of the solution is insufficient. ?? Given that my protein has coagulated, I would suggest trying to find the solution as above. archive.unu.edu/unupress/food/8F032e/8F032E03.htm


Note that I made my brine outdoors as the reaction when adding the alkali salts is VERY violent.


You shouldn't wash the egg after removing it from the brine. We need the lye + salt to stay on the eggshell and solidify it.

Jan Doggen

This looks more like a comment on Joshua's answer than an actual answer