Charles Gifford wrote:
>
> Sweet butter can be either salted or unsalted.

Not available that way in the US that I have ever
heard of.

> It refers to sweet cream being used rather than
> soured cream (which also can be salted or unsalted).

This appears to be good history, but I've never
seen butter made from sour cream. Once upon a
time butter could be made from the cream that
went sour or from the expensive fresh cream,
and that's the source of the name. Now that
trucks deliver truck to dairies, it is all made
from sweet cream.

Now that you mention it, I would be interested in
butter made from sour cream just to see what it's
like. Can it be made in a mixer just like regular
butter? Start with (sweet or sour) cream. Mix
until it turns yellow. Voila (sweet or sour) butter?