Plain buttermilk is a refreshing and tangy beverage made by diluting yogurt with water and sometimes adding a pinch of salt. It's a popular drink in many cultures and cuisines around the world, known for its cooling properties and digestive benefits.

To make plain buttermilk, simply whisk together yogurt and water until smooth. Add a pinch of salt if desired, although some people prefer their buttermilk without any seasoning. The consistency can be adjusted by varying the ratio of yogurt to water, depending on personal preference.

Plain buttermilk can be enjoyed on its own as a refreshing drink, or it can be used as a base for flavored buttermilk drinks by adding ingredients like mint, coriander, ginger, or spices such as cumin or black pepper. It's a versatile beverage that complements spicy and savory dishes, making it a popular choice for pairing with meals.