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What did European/American historical cooks do with the egg whites?

Seasoned Advice Asked on January 30, 2021

I do some historical cooking out of old cookbooks, like Amelia Simmons’ American Cookery or The Art Of Cookery Made Plain and Easy. One thing I’ve noticed is that these cookbooks use way more egg yolks than whites. For example, I prepared an 18th century feast one night and ended up with 10 leftover egg whites in a jar.

This left me wondering, what did they do with the egg whites? Given the extreme frugality of cooks centuries ago, which included using every scrap of stale bread and every bit of a pig including the oink, I find it impossible to believe that they were wasted. They must have used them for something … but that’s not in the recipes I have. So, questions:

  1. Are the cookbooks we have simply not representative of actual cookery of the 15th-18th century? That is, are they purely posh cookery and as a result did actually waste the egg whites?
  2. Or were the egg whites used for some other purpose that required a lot of whites, maybe even a non-culinary purpose?

Help me solve this mystery. Thanks!

4 Answers

There were certainly uses for egg whites that didn't involve eating them:

None of these would use a lot, of course. I suspect that most leftover whites would have been used up in cooking. Apart from the obvious meringues of various types, they can be used:

  • As an egg wash on pastry.
  • In place of whole egg before coating something in breadcrumbs
  • Finings are also used in clarifying stock (link is to an alternative method proposed by Heston Blumenthal). Consommé was probably popular around that time; certainly Mrs Beeton, writing in England in the 19th century included several recipes. While she mentioned that clarifying may be required, her consommé recipes don't call for the use of egg. Fannie Farmer's Boston Cooking-School Cook Book (1896) does explain this method, though without quantities.
  • Or simply added to many things that use beaten egg (I use up half eggs, either half, in an omelette with whole eggs). In fancy households that could mean servants' food - after all there are many low-effort ways of preparing egg. In a smaller household, everyday meals could use them up, though quickly without refrigeration

They can also be fed to many domestic animals, but given that most animals probably lived on scraps, this is effectively discarding them.

Answered by Chris H on January 30, 2021

Just the other day I was watching an episode of the Great British Baking Show (sorry, don't remember which one), and they mentioned that egg whites were often used to stiffen clothing, something we'd do with starch today. That left an excess of egg yolks, which was supposed to be the explanation for why so many recipes back then used egg yolks.

Answered by Pete Becker on January 30, 2021

Another high-volume specialist use for egg white was mortar. Specifically, it was used very frequently in the Middle Ages, in the standard lime and sand mortar: a 2017 study suggests that 6% egg albumen (I assume by weight) provides the strongest mortar.

It was not the only binding agent available to construction, but at least in the Middle East and in Europe, it was one of the most easily procured. Its role is to aerate the mortar, which is essential in preventing thermal contraction damage (ice or heat), and modify its hydration (usually by allowing a lower water-to-cement ratio, increasing strength and water resistance while still being workable).

The use of egg white in construction persisted into the late 19th century in the colonial Philippines. According to one report, this use of egg white in the buildings transformed native Filipino desserts.

Answered by Michaelyus on January 30, 2021

Apparently divided culinary uses for eggs were not uncommon, in addition to industrial uses for egg whites mentioned by others. (Filipino egg-yolk cookies, among other things, are attributed to the massive use of egg whites in the cement for local churches, and egg whites made medieval cement water-resistant.)

Egg whites were reportedly used to make egg white omelettes and egg white pasta in the first printed cookbook, 1465's De honesta voluptate et valetudine from Italy.

Answered by arp on January 30, 2021

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