how to make buttermilk

{from about.com- I've used this- works like a charm! don't think I'll ever buy buttermilk again!}

Making a recipe that calls for buttermilk? Use this simple substitute, and you won't need to buy any:

Prep Time: 5 minutes

Ingredients:

• Milk (just under one cup)
• 1 Tablespoon white vinegar or lemon juice

Preparation:

1. Place a Tablespoon of white vinegar or lemon juice in a liquid measuring cup.

2. Add enough milk to bring the liquid up to the one-cup line.

3. Let stand for five minute. Then, use as much as your recipe calls for.