How to Make Buttermilk for Baking: Measured Substitutes
To replace 1 US cup of liquid buttermilk: put 1 tablespoon lemon juice or plain white vinegar in a measuring cup, then add milk to the 1-cup line. Stir and wait 5–10 minutes. Use for a baking fallback, not as an identical replacement for cultured buttermilk.
Measure the substitute, not an extra cup of milk
The acid is included in the final volume. Adding it to a full cup of milk would give you too much liquid.
- For ½ cup: 1½ teaspoons lemon juice or white vinegar; add milk to make ½ cup total.
- For 1 cup: 1 tablespoon acid; add milk to make 1 cup total.
- For 2 cups: 2 tablespoons acid; add milk to make 2 cups total.
Use US measuring cups and spoons consistently. Stir the mixture before adding the amount requested by your recipe.
Plain Greek yogurt and milk
Another baking option is ⅓ cup plain Greek yogurt plus ⅔ cup milk to make 1 cup. Whisk until smooth. Choose unflavored yogurt without added sugar.
Yogurt thickness and fat content vary, so batter texture may change. Pick one method; do not combine this mixture with the acidified-milk formula.
What this substitution cannot promise
- It is not cultured buttermilk. The taste and consistency differ, especially in dressings and cold dishes.
- Plain milk alone is not the same swap. Acidity matters in recipes that use baking soda.
- Powder is different. Follow the package instructions for buttermilk powder instead of using a liquid ratio.
- It still contains milk. This is a pantry substitution, not a dairy-allergy solution.
Keep the original ingredient for recipes where buttermilk’s flavor or texture is central. For predictable results, choose a complete recipe written for the ingredients you have.
Stay with your recipe
From any recipe, type buttermilk in “Need a substitute?” to see this answer. Open the result for details, then close the panel to return to the same place in your recipe.
Explore breakfast recipes or read about baking powder and baking soda.
Reference guidance, not a claim that every variation has been kitchen-tested. Ingredient changes can affect texture, flavor, nutrition and allergens.
Need only a quarter cup?
Put ¾ teaspoon lemon juice or white vinegar in the measuring cup, then add milk to make ¼ US cup total. Use the same measuring system throughout; the acid is part of the final volume.
What should the mixture look like?
It may thicken slightly and show tiny curds, but it will often remain thinner than cultured buttermilk. Do not keep adding acid in an attempt to make it look identical. Stir once more before measuring it into the batter.
Where this substitute works best
It is a practical option in many pancakes, muffins and quick breads, where acidity helps balance baking soda. The recipe’s fat, flour and leavening still matter, so a substitute may change tenderness or flavor slightly. Follow the original mixing instructions and avoid overworking the batter.
When to choose something else
In a thick dressing or dip, cultured buttermilk or a suitable thinned plain yogurt often gives a closer texture. A delicate recipe built specifically around cultured buttermilk may be less forgiving. Do not replace buttermilk with plain milk and remove the acid without considering the baking soda in the recipe.
Common questions
Can I use spoiled milk? No. Use fresh milk within its safe storage period. Adding acid does not make spoiled milk safe. Can I make it ahead? Make only what you need, refrigerate promptly and do not treat the added acid as a preservation process. Is it dairy-free? Not when made with ordinary milk. Plant-based products behave differently, so use a recipe designed for the chosen product when an allergy or dietary restriction matters.
If you are churning cream instead, the liquid left after making butter is a different product and may not provide the acidity your baking recipe expects. See also baking powder versus baking soda before changing leavening ingredients.
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