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How to Sour Milk

how-to-sour-milk

ANSWER:

Sour milk can be made by the addition of bacterial fermentation or the addition of food acids.

More Info: The sour milk called for in recipes has no relation to the adjective people use to describe milk that has gone bad. The process of souring milk entails fermentation through the addition of acidity. The addition of an acid to milk, such as the acetic acid in vinegar, turns the milk sugar into lactic acid, which lowers the pH of the milk. Casein, a milk protein, is not soluble under the acidic conditions, which causes the milk to clabber.

Sour Milk Recipes

  • Option 1: Add one tablespoon of white or cider vinegar to one cup of milk. Allow to stand for five to ten minutes.
  • Option 2: Add one tablespoon of lemon juice to one cup of milk. Allow to stand for five to ten minutes.
  • Option 3: Add one-and-a-half teaspoons of cream of tartar to one cup of milk. Allow to stand for five to ten minutes.

Sour Milk Substitutions

For most recipes, you can substitute one of the following sour milk products: (directions are for one-cup, you can adjust your needs accordingly.

  • Option 1: Add one tablespoon of white or cider vinegar to one cup of milk. Allow to stand for five to ten minutes.
  • Option 2: Add one tablespoon of lemon juice to one cup of milk. Allow to stand for five to ten minutes.
  • Option 3: Add one-and-a-half teaspoons of cream of tartar to one cup of milk. Allow to stand for five to ten minutes.
  • Option 4: One-cup sour cream
  • Option 5: One-cup buttermilk
  • Option 6: One-cup plain yogurt

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