Question: can you substitute low fat milk for buttermilk?
Answer: Milk and Vinegar You can use any kind of milk as well, but if your recipe calls for a certain type of buttermilk — such as low-fat — it may be best to use a similar type of milk to make a substitute. To make 1 cup of buttermilk substitute, add 1 tablespoon (15 ml) of vinegar to a liquid measuring cup.