Take ten bushels of malt to a hogshead, then put two bushels of elder-berries pickt from the stalks into a pot or earthen pan, and set it in a pot of boiling water till the berries swell, then strain it out and put the juice into the guile-fat, and beat it often in, and so order it as the common way of brewing.
Source:
Old Cookery Books and Ancient Cuisine