My grandmother kept buttermilk in the refrigerator at all times. Not only was it a key ingredient in baking delicious items like biscuits and pancakes, it was my grandfather's favorite drink. In fact, every night before bed he would crumble saltine crackers into a tall glass of cold buttermilk for his late night snack.
Most of us do not keep buttermilk at the ready, but there are times we are assembling our ingredients and realize the recipe calls for buttermilk. Well, no worries and no need to run out for buttermilk. Just mix 2 tablespoons of white vinegar or fresh lemon juice with a cup of regular milk and - like magic, you've got a cup of buttermilk suitable for cooking.