Baking Science: What is Cream of Tartar?

You’ve seen Cream of Tartar creep up in ingredient lists from time to time, but what is it? Can you substitute something for it?

What is Cream of Tartar?

Cream of tartar is a white powdery ingredient that has acidic properties. It is a byproduct of wine making. It is often confused with tartaric acid, however, they are not the same thing. Cream of tartar is tartaric acid mixed with potassium hydroxide and therefore less acidic than straight tartaric acid.

Cream of tartar not only has many uses in baking but can also be used as a cleaning solution similar to how you would use baking soda as an alternative to bleach.

Cream of Tartar Uses

• Stabilizes egg whites
• Provides acidic/ tangy flavor
• Thickener
• Anti-caking agent
• Strengthens whipped cream

Does Cream of Tartar Expire?

Cream of tartar doesn’t really expire. Make sure you keep it in an airtight container in a spot that doesn’t get too hot or too humid and your cream of tartar should last indefinitely!

Alternatives for Cream of Tartar

The thing about cream of tartar is that many people who don’t bake often, and even some people who do bake often, do not keep it on hand. If you don’t keep it on hand you can substitute it in a couple of different ways.

• 1 teaspoon of Lemon Juice or Vinegar for every 1/2 teaspoon of Cream of Tartar
• 1 1/2 teaspoons Baking Powder for every 1 teaspoon of Cream of Tartar

Recipes using Cream of Tartar