Well, tinctures, in general, are nothing more
than extractions made in alcohol.
That is, if you do it in alcohol.
We normally use neutral spirits here,
you can use grain spirits or vodka...
Something that doesn't give you too much flavor,
so you can extract all the properties of your ingredient,
which could be a herb, mushrooms, or even
citrus peels.
Our tincture here at the restaurant has a twist.
It goes through a fat wash,
so it will have a predominantly mushroom flavor
with a velvety texture from the butter.