Sour Milk Recipe – How to Make Sour Milk

cup of sour milk

Need Sour Milk for a recipe?

Sour Milk or Soured milk is milk that either has acid (vinegar or lemon juice) added to it or has fermented. It would take a day or so of letting it sit out for it to ferment so instead this recipe uses an acid because who has a day or so to wait for it to ferment when you have a recipe to make?

Sour milk is easy to make and is often used as a substitute for Buttermilk. While not 100% exactly buttermilk it will be similar and will have the acidity that a recipe may require especially for baking. Remember what happens when you combine baking soda with an acid?  (think science project volcano) Recipes with baking soda or baking powder that call for sour milk or buttermilk need the acidity to rise.  If you want to know more about how they are different read this post.

How to make 1 cup sour milk

To make exactly 1 cup of sour milk put 1 tablespoon of white vinegar or lemon juice in a measuring cup and fill it up with milk until you get to the 1 cup mark. Give it a stir.

Let it sit for 5 minutes so it can become soured and it’s ready to use. That’s it you are done!

How to make 1/2 cup sour milk

Same process but use 1 1/2 tsp of vinegar or lemon juice and fill measuring cup with milk to 1/2 cup.

How to make 1/4 cup sour milk

Same process but use 3/4 tsp (1/2 tsp plus 1/4 tsp) of vinegar or lemon juice and fill measuring cup with milk to 1/4 cup.

NOTE!

IF you need the milk to curdle/thicken it should be room temperature or slightly warmed in the microwave on a low defrost setting.  I’m not convinced this is needed.  Not being cold could throw a recipe off also. If I find otherwise I’ll update this post.

Still reading?  Want to know even more?  Check out the Wikipedia.

Yum

Sour Milk
 
Prep time
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Total time
 
Need Sour Milk for a recipe?

It's easy to make and is often used as a substitute for Buttermilk. While not 100% exactly buttermilk it will be similar and will have the acidity that a recipe may require especially for baking. Remember what happens when you combine baking soda with an acid? (think science project volcano) Recipes with baking soda or baking powder that call for sour milk or buttermilk need the acidity to rise.
Author:
Serves: 1 cup
Ingredients
  • 1 tbsp white vinegar or lemon juice
  • 1 cup of milk ( just a little less, read instructions)
Instructions
  1. To make exactly 1 cup of sour milk put 1 tablespoon of white vinegar or lemon juice in a measuring cup and fill it up with milk until you get to the 1 cup mark. Give it a stir.
  2. Let it sit for 5 minutes so it can become soured and it's ready to use.
  3. That's it you are done!
Notes
How to make ½ cup sour milk - Same process but use 1½ tsp of vinegar or lemon juice and fill measuring cup with milk to ½ cup.

How to make ¼ cup sour milk - Same process but use ¾ tsp (1/2 tsp plus ¼ tsp) of vinegar or lemon juice and fill measuring cup with milk to ¼ cup.

IF you need the milk to curdle/thicken it should be room temperature or slightly warmed in the microwave on a low defrost setting. I'm not convinced this is needed. Not being cold could throw a recipe off also. If I find otherwise I'll update this post.