1. plural of buttermilk; the liquid left after butter is churned from cream, or a cultured dairy product made by adding lactic acid bacteria to milk
Usage: usually uncountable in modern usage, but 'buttermilks' may refer to multiple types or batches

Examples

• The recipe calls for two cups of buttermilk.
• Different buttermilks have varying levels of acidity.
• She poured buttermilk into the pancake batter.
• Traditional buttermilks were a byproduct of butter-making.
• The bakery uses cultured buttermilks from local dairies.