Reduce the solids to a coarse powder, add the remaining ingredients, macerate for 7 days, agitating occasionally, express and filter.

Hamburg Bitters

by Darcy O'Neil :: [Bitters]

Many regions of Germany have their own style of bitters and this is one of the recipes from the Hamburg region.

It's probably best to avoid the Agaric as it is a species of mushroom that can be edible or poisonous.