The Fastest Buttermilk Substitutes

You can make a buttermilk replacement in under five minutes using milk and an acid you likely have in your kitchen. The two most reliable methods are mixing regular milk with lemon juice or white vinegar. Both work because buttermilk's tang comes from lactic acid, and adding an acid to milk mimics that flavor and texture.

For milk and lemon juice: measure one cup of milk into a bowl or measuring cup, then add one tablespoon of fresh lemon juice. Stir well and let it sit for five minutes. The milk will thicken slightly and develop a sour smell—this is exactly what you want. Use it when ready in your recipe.

For milk and white vinegar: follow the same method—one cup of milk plus one tablespoon of white vinegar. Stir, wait five minutes, and use. Vinegar works slightly faster than lemon juice and produces a sharper tang. If you have apple cider vinegar on hand, it works too, though the flavor will be more noticeable in delicate recipes like pancakes or pound cake.

Key Takeaways

  • Mix one cup of milk with one tablespoon of lemon juice or white vinegar, wait five minutes, and use it as a direct replacement for buttermilk in any recipe.
  • Yogurt thinned with milk (half yogurt, half milk) works well in baked goods and adds richness, though it changes texture slightly in pancakes or waffles.
  • Sour cream mixed with milk (three-quarters sour cream, one-quarter milk) produces the closest flavor match to real buttermilk.
  • Cream of tartar mixed with milk creates a substitute that works in baking but tastes less authentic than acid-based methods.
  • The acid-and-milk method works in any recipe calling for buttermilk, from biscuits to cakes to marinades.

When Yogurt Works Better Than Acid and Milk

If you have plain yogurt in your refrigerator, it can replace buttermilk in most baking recipes. Yogurt already contains lactic acid and has a similar thickness to buttermilk, so it needs only a small adjustment. Mix half yogurt and half milk by volume—for example, half a cup of yogurt plus half a cup of milk to replace one cup of buttermilk.

Yogurt works especially well in cakes, muffins, and quick breads because it adds moisture and a subtle tang without changing the rise or crumb structure. The flavor is gentler than vinegar-based substitutes, which matters in recipes where buttermilk is a main flavor note, like red velvet cake or buttermilk pie.

One limitation: yogurt can make pancakes and waffles denser than buttermilk does, because yogurt's thickness interferes with how batter spreads. For those recipes, stick with the milk-and-acid method or thin the yogurt mixture with an extra tablespoon or two of milk.

Sour Cream as a Buttermilk Stand-In

Sour cream produces the closest flavor match to real buttermilk because it has the same tangy taste and similar fat content. The drawback is that sour cream is much thicker, so you must thin it before using it. Mix three-quarters cup of sour cream with one-quarter cup of milk to replace one cup of buttermilk.

This substitute works best in recipes where buttermilk is a supporting ingredient rather than the star—biscuits, cornbread, and layer cakes all turn out well. The extra fat from sour cream can make baked goods slightly more tender, which is usually a benefit. However, in recipes that depend on buttermilk's specific acidity level (like angel food cake or recipes using baking soda), the sour cream substitute may produce slightly different results.

Measure carefully when thinning sour cream, because too much milk will make the mixture too thin and affect how your batter sets. Start with the three-to-one ratio and add milk only if the mixture seems thicker than regular buttermilk.

Cream of Tartar and Milk for Baking

Cream of tartar is a powdered acid that can replace buttermilk in baking recipes, though the flavor is less authentic than other methods. Mix one cup of milk with one-eighth teaspoon of cream of tartar, stir well, and use when ready. The mixture will not thicken as noticeably as milk-and-vinegar does, but the acid will set up baking soda just as well.

This method works reliably in recipes where buttermilk is paired with baking soda, because the chemical reaction between acid and soda is what matters. Biscuits, pancakes, and cakes all rise properly. The taste, however, is milder and less tangy than real buttermilk, so use this substitute only when you do not have lemon juice, vinegar, or yogurt available.

Cream of tartar is inexpensive and keeps for years in a sealed container, making it worth stocking if you bake regularly. One small container will last through dozens of batches.

What to Avoid and Why

Do not use regular milk alone as a buttermilk substitute. Milk lacks the acidity that buttermilk provides, and in recipes using baking soda, the batter will not rise properly. Baking soda needs acid to set up, and plain milk cannot provide it.

Avoid sweetened yogurt or flavored yogurt products. These contain added sugar and flavorings that will throw off your recipe's balance. Stick to plain yogurt, whether it is Greek-style or regular.

Do not substitute buttermilk in marinades or dressings with milk-and-acid alone if you are marinating for more than a few hours. The acid can over-tenderize meat or break down vegetables too much. For long marinades, use yogurt or sour cream instead, which have gentler acidity.

Timing and Temperature Notes

All milk-based substitutes work at room temperature. If your recipe calls for cold buttermilk (which is rare), chill your substitute for at least 30 minutes before using it. If your recipe calls for buttermilk at room temperature, let your substitute sit out for 15 to 20 minutes after mixing.

The five-minute wait after mixing milk and acid is important. During this time, the acid begins to curdle the milk proteins, thickening the mixture and developing the sour flavor. If you use the substitute before five minutes have passed, it will work, but the texture and tang will be less pronounced.

For baking, the difference is usually small enough that most home cooks will not notice. For recipes where buttermilk flavor is central—like buttermilk pie or buttermilk pancakes—waiting the full five minutes produces noticeably better results.

Frequently Asked Questions

Can I use these substitutes in savory recipes like marinades or salad dressings?

Yes, all of these substitutes work in savory applications. Milk-and-vinegar is especially good in marinades because vinegar adds flavor. For dressings, sour cream thinned with milk produces a richer, more authentic taste than milk-and-acid. Yogurt works well in both but adds a slightly different flavor profile than traditional buttermilk.

Does it matter which type of milk I use—whole, 2%, or skim?

Whole milk produces the closest match to real buttermilk because buttermilk is made from the liquid left after churning butter, which is high in fat. Two-percent milk works fine in most recipes. Skim milk can be used, but the substitute will taste thinner and less rich. For baking, the difference is usually small enough that you will not notice.

What if I do not have lemon juice or vinegar?

Cream of tartar mixed with milk is your next best option. If you have neither vinegar nor cream of tartar, use yogurt or sour cream thinned with milk. All of these produce working substitutes, though the flavor and texture will vary slightly depending on which you choose.

Can I make a large batch of buttermilk substitute and store it?

Milk-and-acid substitutes should be used within a few hours of mixing because the acid continues to work and the mixture can separate. Yogurt and sour cream thinned with milk can be stored in the refrigerator for up to three days in a sealed container, though the flavor will gradually sharpen as the acid develops.

Will these substitutes change how my biscuits or cakes turn out?

Milk-and-acid substitutes produce nearly identical results to real buttermilk in baking. Yogurt and sour cream may make baked goods slightly more tender or moist because of their fat content, which is usually a benefit. The main difference you might notice is in flavor—sour cream and yogurt taste slightly different than buttermilk, but most people find the difference pleasant.