Recipes from The Inglenook Cookbook by The Sisters of the Brethren Church (1906)
ICE CREAM AND DRINKS
KOUMISS
Dissolve 1/3 cake of compound yeast in a little warm water. Take 1 quart of fresh milk and add to 1 tablespoonful of sugar and the dissolved yeast. Put the mixture in beer bottles with patent stoppers. Fill to the neck and let them stand for 12 - hours at a temperature of 68 or 70 degrees, then put the bottles on the ice upside down till wanted.