An old fashioned way of sharing a recipe could have begun with the famous Friendship Cake idea. One would make a fruit starter, baby it for 30 days, then make 3 cakes, one to enjoy and 2 to share with another neighbor or gal pal along with a small batch of the starter.
The mixture is not only great in the cake but can also be used over ice cream, poured on top of an angel or pound cake or served chilled as a dessert dish. A little goes a long way as it can be pretty potent.
Be sure to follow the recipe exactly so the fermentation will work and not spoil.
Recipe for Friendship Cake