Today buttermilk is made in quite a different fashion to that of ye olde farmhouse wyffe. Traditionally buttermilk was a by-product of making butter, the opaque liquid left over after the cream had been churned into a solid state.
Use buttermilk in scones, cakes and soda breads. In India it is served as a chilled drink, often flavoured with toasted cumin, salt or sugar. Buttermilk is also used for refreshing drinks in Scandinavia.