buttermilk
/ˈbʌtərmɪlk/
noun
- A sour liquid left after churning butter, often used in cooking and baking.
- She added buttermilk to the pancake batter for a fluffy texture.
- He drank a glass of cold buttermilk on a hot summer day.
- Buttermilk is a key ingredient in traditional Irish soda bread.