Hi, Gwen. Many, many people have tried this and been unhappy with the results. The mix just doesn't taste or work as well- the buttermilk powder doesn't reconstitute. If you don't want to work with liquid buttermilk, yogurt mixed with some milk is an ok substitute, but also not as good. I recommend freezing excess buttermilk in an ice cube tray (each well is about 2 ounces). That way you don't waste any and can thaw just what you need when it's pancake time. The thawed buttermilk will look curdled, but it works fine and tastes good. Susan

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