I have a recipe that calls for buttermilk. How do I make a substitute if the real thing is not available? 

  There are several choices. One is to mix 1-3/4 tablespoon of cream of tarter into 1 cup of milk. Another is to use 1 tablespoon of lemon juice or white vinegar in 1 cup of milk, which you stir and let stand for 5 minutes. Or in many cases you can use plain yogurt or sour cream.

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