Buttermilk is, as the name suggests, milk (liquid) leftover from the butter-making process. And it’s used in so many incredible ways! For example, did you know it’s what makes fried chicken so juicy and tender? It’s also an essential ingredient in baking cakes, muffins, pancakes, biscuits, and more. So, let’s take a look at all things buttermilk, including what it is, how it’s made, and what you can do with it. What Is Buttermilk? Buttermilk is a fermented dairy product, similar to ... What is Buttermilk made of? Buttermilk is usually made of whole milk and acidity. There are two main types of buttermilk traditional and cultured buttermilk. Traditional buttermilk results from churning whole milk to make butter. The liquid left behind is buttermilk. 1-48 of 489 results for "butter milk bottle" Showing products near you, with fast delivery See all products, across price ranges. We've all been there–you're several ingredients deep in a recipe and realize it calls for buttermilk, which you don't have. Instead of making a trip to the store, just make your own buttermilk substitute!