I know that cream of tartar is a key ingredient in snickerdoodles and is a great stabilizing agent, but what other uses are there? My tiny cream of tartar has been gathering dust.
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Meringues! Just a pinch when you're whipping works magic.
HalfPint is a trusted home cook.
You can mix cream of tartar with vinegar into a paste, to use as a scrubbing agent for hard water stains and soap scum. This paste can be used as a metal cleaner, like cleaning and buffing copper pots. And it can be used as a stain remover for fabric.
AntoniaJames is a trusted source on Bread/Baking.
You can combine it with baking soda to make baking powder. Just make sure that your cream of tarter is fresh. If not, it will leave a nasty bitter taste in your baked goods. (It sounds like your tiny container doesn't qualify as "fresh," but it should have a "use by" date on it where you can check.) The ratio is one teaspoon of baking soda to 2 teaspoons of cream of tarter plus one teaspoon of corn starch. ;o)
Scones and snickerdoodle cookies!