Learn how to make buttermilk with just two ingredients. This simple method for making buttermilk substitute comes together in just five minutes and can be used in all of your favorite buttermilk recipes.

Tablespoon of lemon juice held over a liquid measuring cup of milk.

I love baking with buttermilk, but it’s not an ingredient that I always keep on hand in my refrigerator. So what do I do when I get a craving for Buttermilk Pancakes or Homemade Biscuits and I don’t have any buttermilk in the fridge? I make this easy buttermilk substitute!

What is Buttermilk?

Buttermilk is an ingredient that’s often used for flavor and/or tenderness in recipes for everything from pancakes to salad dressings and fried chicken. It has a tangy flavor and can be used to create light and fluffy baked goods, such as muffins, waffles and quick breads. Buttermilk reacts with baking soda to help baked goods rise. It’s also a great meat tenderizer, often used in marinades or for dredging when making battered chicken such as Air Fryer Fried Chicken.

Originally, buttermilk was the slightly sour liquid left behind after cream was churned into butter.

Today, the buttermilk that you buy at the grocery store is cultured buttermilk, made by adding live cultures to milk that transform it into buttermilk through a fermentation process.

Homemade buttermilk substitute in a liquid measuring cup.

How to Make Buttermilk

To make buttermilk you will need milk and an acid such as lemon juice, white vinegar or even plain yogurt. Lemon juice is my preference, but it’s convenient to have other options for those times when you don’t have lemons on hand.

You can use any type of milk to make homemade buttermilk, including whole milk, 2% milk, skim milk, almond milk, soy milk or coconut milk. I like to use whole milk because it makes a thicker buttermilk. Homemade buttermilk won’t be quite as thick as the buttermilk you buy at the store, but it will perform the same role in recipes.

How to make buttermilk with lemon juice or white vinegar:

  • Pour 1 tablespoon of lemon juice or vinegar into a liquid measuring cup.
  • Add milk until the total volume is 1 cup. Stir.
  • Let the mixture sit for 5-10 minutes, until it curdles and slightly thickens.

To make buttermilk with plain yogurt:

  • Add 1/2 cup of plain Greek yogurt or 3/4 cup of regular plain yogurt (unsweetened) to a liquid measuring cup.
  • Add milk until the total volume is 1 cup. Whisk until smooth.

Then use the buttermilk substitute as an equal replacement for buttermilk in recipes.

Buttermilk substitute on a spoon held over liquid measuring cup.

Dairy-Free Buttermilk

To make a dairy-free buttermilk, use your non-dairy milk of choice in this recipe, such as almond milk, soy milk or coconut milk. Use the lemon juice or vinegar method, not the yogurt method.

Buttermilk Recipes

There are so many ways to use buttermilk! Here are some of my favorites:

Spoonful of lemon juice held over milk in liquid measuring cup.
5 from 1 rating

How to Make Buttermilk

Servings: 1 cup
Prep Time: 5 minutes
Total Time: 5 minutes
How to make buttermilk with just two ingredients in about five minutes. If you've forgotten to buy buttermilk at the grocery store, you can use this buttermilk substitute as an equal replacement for store-bought buttermilk in your favorite buttermilk recipes.

Ingredients

To make buttermilk with lemon juice or vinegar:

  • 1 tablespoon lemon juice or white vinegar
  • 1 cup milk, whole, 2% or skim

To make buttermilk with yogurt:

  • ½ cup plain Greek yogurt, or ¾ cup regular plain yogurt
  • ¼-½ cup milk

Instructions
 

To make buttermilk with lemon juice or vinegar:

  • Put 1 tablespoon lemon juice or white vinegar in a liquid measuring cup.
  • Add milk to make 1 cup total. Stir.
  • Let stand 5-10 minutes, until curdled and slightly thickened.

To make buttermilk with yogurt:

  • Add plain Greek yogurt or regular plain yogurt to a liquid measuring cup.
  • Add milk to make 1 cup total volume.
  • Whisk until smooth.

Notes

  • To make non-dairy buttermilk, use almond milk, soy milk or coconut milk in place of the milk. (Use the lemon juice/vinegar method.)
Serving: 1cup, Calories: 154kcal, Carbohydrates: 13g, Protein: 8g, Fat: 8g, Saturated Fat: 5g, Cholesterol: 24mg, Sodium: 105mg, Sugar: 13g
Nutrition information is an estimate.
Cuisine: American
Course: ingredient
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