Well, it's about the jar. Who makes it

Jenaar Al Wagenfeld, Egg Coddler #1. They come in several sizes but can be hard to find. Most recently discussed here: http://food52.com/hotline/14145-a-question-about-a-recipe-aunt-mariah-s-lemon-sponge-cups

(BTW, boulangere didn't take that pic. )

This question was asked a couple of months ago and was answered and I cannot find the link and it has been driving me crazy. My recommendation is to write [email protected] and ask the question. They will know. Good luck!

Amanda Hesser owns the jars. The photo was taken by Food52.

You may not realize that you can search for cooks (upper right of screen) by name, then you can email boulangere directly, rather than hoping she might come across this post. :)