Have you ever needed buttermilk for a recipe — like Chili Pepper Madness’ jalapeno “bottle caps” or Alexandra’s Kitchen’s buttermilk blueberry breakfast cake — but didn’t have any on hand? If so, ...

Buttermilk is useful in the kitchen, but it feels fleeting. Everyone's been in the unenviable position of realizing you have everything you need for a recipe except that fickle fermented dairy. It ...