Pour 1 cup of milk into a bowl or measuring cup
Add 1 tablespoon of lemon juice or white vinegar
Stir gently
Let it sit for 5 to 10 minutes
Use when the milk looks slightly curdled and thickened
For a creamier version, use 1 cup of milk mixed with 1 tablespoon of plain yogurt or sour cream
Stir and let it sit for 5 to 10 minutes before using