Buttermilk is a dairy drink made by adding lactic acid bacteria to milk to produce a fermented dairy drink. Traditionally, it was made from the nearly fat-free milk remaining after churning butter fro
Milk (left) compared with fermented buttermilk (right), which is thicker and leaves a visible residue on the glass.
Churning is the process of shaking up cream or whole milk to make butter, usually using a device called butter churn. In Europe from the Middle Ages until the Industrial Revolution, a churn was usuall
Canadian farm girl churning butter, 1893.
A barrel-type butter churn.
Churn with plunger Ethnographic Museum of Western Liguria, Cervo, Italy