Green Goddess by Wendyl Nissen.
Here's my easy recipe for you to make your own butter at home:
salt, to taste
600 ml cream
Simply pour the cream in a bowl, get out your electric beaters and whisk until lumps of butter appear and eventually form a big lump. It takes about ﬁve to fifteen minutes on a medium speed.
Remove the lump of butter and douse it in a bowl of cold water squeezing gently. Rinse under a running tap and then put in a bowl and use.
Add salt to taste and to preserve.