Buttermilk being poured into glassware
Turn Milk Into Buttermilk With One Ingredient
When considering alternatives for buttermilk, you require something creamy and something sour. This is why regular milk and an acidic compound make for a great substitute.
To make the substitute, stir a tablespoon of lemon juice or a mild vinegar, like distilled white or apple cider, into a cup of milk and let the mixture sit for a few minutes.
The milk will begin to curdle very slightly. It's usually a bad sign, but when making a buttermilk substitute, it means the milk has been acidified, which is exactly what we want.
Using whole milk or cream will yield the richest result, but lower-fat milk, lactose-free milk, or non-dairy alternatives like soy, oat, almond, or coconut milk will also work.
While a one-for-one swap of buttermilk for this substitute works for baking, they don’t have the same viscosity and won’t yield the same texture in salad dressings and wet dredges.