This is most wholesome and refreshing.
Mix the buttermilk and sweet milk together, add the sugar, and stir until it is dissolved. Cover the basin with a cloth, and put it at the side of the kitchen fire. Let it stand for twelve hours. Then bottle it; cork it tightly, using new corks. Tie them securely on with string, and lay them on their sides.
The contents of a bottle must be used straight off.