If you've run out of sour cream and don't want to run to the store for more—you can make it at home with just two ingredients: heavy cream and vinegar!
Ingredients
1 cup heavy cream ($1.40)
1 Tbsp vinegar ($0.02)
Instructions
1Add the cream to a mason jar or other airtight container.
2Add the vinegar to the cream. (Or whatever acid you decide to work with.)
3Close the container and shake it for a minute or two, until the cream thickens.
4Use the cream right away or leave the jar on your counter overnight to ferment and thicken.*
