Finding the right substitute for buttermilk matters because this ingredient does more than add tang.
It helps tenderize baked goods, supports leavening, and improves texture in pancakes, cakes, biscuits, and fried coatings.
The good news is that several practical substitutes can deliver similar results, but the best choice depends on the recipe, the flavor you want, and whether you need a dairy-free option.
What buttermilk does in recipes
Traditional buttermilk was the liquid left after churning butter, but most grocery store versions are cultured buttermilk made by adding lactic acid bacteria to milk.
That fermentation gives buttermilk its characteristic tang and thicker texture.
In cooking and baking, buttermilk serves three main purposes:
- Acidity: reacts with baking soda to create lift.
- Tenderizing: breaks down gluten slightly, producing softer crumbs.
- Flavor: adds mild tang that balances sweetness and richness.
Because of these functions, the best substitute for buttermilk should ideally mimic acidity and liquid volume, not just consistency.
Best substitute for buttermilk in most recipes
The most reliable substitute for buttermilk is a mix of milk and an acid, usually lemon juice or white vinegar.
This option is widely used because it is easy, inexpensive, and works in both quick breads and batters.
How to make it
- Use 1 cup of milk.
- Add 1 tablespoon of lemon juice or white vinegar.
- Stir and let it sit for 5 to 10 minutes.
The milk will curdle slightly, which is normal.
Whole milk is often preferred because its fat content gives a richer result, but 2% or low-fat milk also works.
This substitute is best for recipes that need the acidity of buttermilk more than its exact cultured flavor, such as pancakes, muffins, scones, cakes, and quick breads.
Can you use plain yogurt instead?
Yes.
Plain yogurt is one of the best substitutes for buttermilk because it shares both acidity and the cultured dairy flavor.
It is especially useful when the recipe benefits from a thicker batter.
How to use yogurt as a substitute
- Thin plain yogurt with a small amount of milk or water if needed.
- Use about 3/4 cup yogurt plus 1/4 cup milk to replace 1 cup buttermilk.
Greek yogurt can also work, but it usually needs more thinning because it is much thicker.
This substitute is excellent in muffins, coffee cakes, banana bread, and savory marinades.
What is the best dairy-free substitute for buttermilk?
For a dairy-free option, the most effective substitute for buttermilk is unsweetened plant milk mixed with an acid.
Soy milk is often the closest in performance because it has a higher protein content and curdles more like dairy milk.
Recommended dairy-free mix
- 1 cup unsweetened soy milk
- 1 tablespoon lemon juice or vinegar
Let it sit for several minutes before using.
Almond milk, oat milk, and cashew milk can also work, but results vary depending on brand and formulation.
Choose unsweetened versions to avoid affecting flavor.
If the recipe is delicate, test the batter first because some plant milks do not thicken or curdle as strongly as dairy.
How does sour cream compare?
Sour cream is another strong substitute for buttermilk, especially in recipes where richness matters.
Like yogurt, it is acidic and thick, so it can help create a tender, moist texture.
How to use sour cream
- Thin sour cream with a little milk or water.
- Use about 3/4 cup sour cream plus 1/4 cup liquid to replace 1 cup buttermilk.
This option works well in baked goods such as cakes, muffins, biscuits, and pound cake.
It is less ideal if the recipe depends on a thin liquid, such as some marinades or coatings.
Can you use kefir as a substitute for buttermilk?
Kefir is an excellent buttermilk substitute because it is naturally tangy, fermented, and pourable.
In many recipes, it can be used in a 1:1 ratio without adjustment.
Kefir is especially useful in pancakes, waffles, and quick breads.
Because it is already acidic, it supports baking soda just as buttermilk does.
It may have a slightly different flavor profile, but the results are usually close.
Which substitute works best for fried chicken or savory batters?
For fried chicken, cornbread, or savory batters, the best substitute for buttermilk is usually milk and acid, kefir, or thin yogurt.
These options provide enough acidity to help tenderize proteins and improve browning.
If you are marinating chicken, poultry, or pork, buttermilk substitutes should be unsweetened and mildly acidic.
Avoid flavored or sweetened products, since they can affect the final taste and color.
Which substitute works best for biscuits and scones?
Biscuits and scones need a substitute that supports rise while keeping the dough tender.
Milk plus vinegar or lemon juice is often the most dependable option because it behaves similarly to buttermilk and keeps the dough easy to handle.
Plain yogurt and kefir also work well, especially if you want a slightly richer or more tangy result.
Sour cream should be thinned first so it blends into the dough evenly.
Substitute for buttermilk in a pinch: quick options
If you need a last-minute substitute, these options are the most practical:
- Milk + lemon juice: fast, versatile, and widely effective.
- Milk + white vinegar: neutral flavor and similar performance.
- Plain yogurt + milk: good for baking and richer textures.
- Kefir: close match for both texture and acidity.
These choices cover most home recipes without requiring specialty ingredients.
How to choose the right substitute for buttermilk
Selecting the best substitute depends on what the recipe needs most.
Use these guidelines:
- For baking soda reactions: choose an acidic substitute such as milk with vinegar, kefir, or yogurt.
- For thick batters: use yogurt or sour cream thinned with liquid.
- For dairy-free recipes: use unsweetened soy milk with lemon juice or vinegar.
- For the closest flavor match: use cultured dairy options like kefir or plain yogurt.
Also consider the role of buttermilk in the recipe.
If it is mainly there for tenderness and acidity, several substitutes will work.
If the flavor is central, cultured substitutes usually perform better than plain milk mixtures.
Common mistakes to avoid
Using the wrong substitute can affect texture, rise, and flavor.
A few common mistakes are easy to avoid:
- Using sweetened plant milk: it can alter flavor and browning.
- Skipping the acid: plain milk alone does not replicate buttermilk’s chemistry.
- Using thick substitutes without thinning: this can make batters too dense.
- Choosing flavored yogurt: it may add unwanted sweetness or fruit flavor.
Measuring carefully matters too, especially in baking, where acidity and liquid ratios influence the final structure.
Quick reference for buttermilk substitutes
- 1 cup buttermilk: 1 cup milk + 1 tablespoon lemon juice or vinegar
- 1 cup buttermilk: 3/4 cup plain yogurt + 1/4 cup milk
- 1 cup buttermilk: 1 cup kefir
- 1 cup buttermilk: 3/4 cup sour cream + 1/4 cup milk or water
- 1 cup buttermilk: 1 cup unsweetened soy milk + 1 tablespoon lemon juice or vinegar
