To be honest, I thought cream of tartar was an actual cream. I would have never thought it looks like a white powdery substance that can be found in the spice section in your local grocery store. At least that’s where I bought mine. So what exactly is it and what role does it play in baking?
Interestingly, cream of tartar and a grapes have something in common. Both are the result of the wine making process. Cream of tartar is the sediment found inside of wine barrels after grapes have fermented. It is also produced and manufactured by combining potassium hydroxide with tartaric acid. Another name for cream of tartar is postassium hydrogen tartrate. Other substitutes for cream of tartar are white vinegar and lemon juice.
I had my first experience using it when beating egg whites for a foam cake. The recipe instructed to add 1/2 tsp. of cream of tartar to my foamy egg whites and then beat again until stiff. At first, I expected the egg whites to stiffen immediately after the addition of cream of tartar. Sort of like when I used a cream stabilizer to make whipped cream. That cream stiffened quickly. In this case, not so much. I still had to beat those egg whites with my life! FYI, I don’t have an electric whisker. But the end result is just what I needed for my foam cake. The eggs whites provided so much air to my light and fluffy cake. Hence, the name foam cake!
Now, I’m beginning to fully understand the role and relationship of each ingredient when it comes to baking. There have been other times when I used a recipe that called for cream of tartar and because I didn’t really know what it was, I never bothered to buy it. Instead, I just dismissed it. I was like, “eh, it’s just 1/2 tsp of something that I’m leaving out” and never gave it a chance in my baking. I hope to have more success when using cream of tartar in my future baking escapades.

