While you can make a meringue without it, using cream of tartar is a good insurance policy that it won't weep. You can also use a pinch in whipped cream to help keep it from deflating. Cream of ...

For instance, if a recipe calls for cream of tartar and baking soda, you’ll need to replace the baking soda in that recipe with enough baking powder to compensate for both. A good ratio to start ...

Baking powder is a leavening agent used in baking, and when you break it down, it's simply a mixture of baking soda (a base) plus cream of tartar (a weak acid). "When combined with liquid ...