Substitute for Sour Cream

Found this on Yahoo! Answers. Thought its a useful tip. Sour cream is expensive here in Kch.

Sour Cream Substitutions and Equivalents

• 1 cup sour cream For baking: 7/8 cup buttermilk or sour milk plus 3 tablespoons butter
• 1 cup sour cream For baking: 1 cup yogurt plus 1 teaspoon baking soda
• 1 cup sour cream For baking: 3/4 cup sour milk plus 1/3 cup butter
• 1 cup sour cream Baking: 3/4 cup buttermilk plus 1/3 cup butter
• 1 cup sour cream Cooked sauces: 1 cup yogurt plus 1 tablespoon flour plus 2 teaspoons water
• 1 cup sour cream Cooked sauces: 1 cup evaporated milk plus *1 tablespoon vinegar or lemon juice. Let stand 5 minutes to thicken.
• 1 cup sour cream Dips: 1 cup yogurt (drain through a cheesecloth-lined sieve for 30 minutes in the refrigerator for a thicker texture)
• 1 cup sour cream Dips: 1 cup cottage cheese plus 1/4 cup yogurt or buttermilk, briefly whirled in a blender
• 1 cup sour cream Dips: 6 ounces cream cheese plus 3 tablespoons milk, briefly whirled in a blender
• 1 cup sour cream Lower fat: 1 cup low-fat cottage cheese plus *1 tablespoon lemon juice plus 2 tablespoons skim milk, whipped until smooth in a blender
• 1 cup sour cream Lower fat: 1 can chilled evaporated milk whipped with 1 teaspoon lemon juice