What's buttermilk?

From google definition:
A dairy beverage liquid with a slightly sour flavor similar to that of yogurt. Traditionally, the liquid by-product of butter churning, now usually made by culturing skim milk.

http://www.google.co.uk/search?hl=en&lr=&cr=countryUK|countryGB&defl=en&q=define:Buttermilk&sa=X&oi=glossary_definition&ct=title

http://forums.moneysavingexpert.com/showthread.html?t=187823&highlight=make+your+own+buttermilk

when it says to use it, it can make a real taste difference.

They stock it in asda, I get mine there, it's got a longer expiration date than you'd expect and now I find it as a fridge essential... good for scones, pikelets, pancakes, muffins etc.

Omertron wrote:

This site is useful for finding substitues for cooking when you run out of something you could swear you had in the cupboard:
The Cook's Thesaurus

I just checked out this thesaurus but can't figure out how you find substitutions. I know for self raising flour you can use plain flour and either cream of tartar or baking powder but I can't remember which. Also for eggs you can use soy flour.

dinkydee wrote:

I just checked out this thesaurus but can't figure out how you find substitutions. I know for self raising flour you can use plain flour and either cream of tartar or baking powder but I can't remember which. Also for eggs you can use soy flour.

You search for the item that you want a substitue for, e.g. Egg, Buttermilk, etc.
Then choose one of the listings that appears (sort of like google) and the substitutions will be on that page.

It is an american site, so sometimes they don't have the same names, so self-raising flour is "cake flour" see here: http://www.foodsubs.com/Flour.html#cake

HTH