A liquid acid reminiscent of white vinegar works in a pinch; you would not need to choose one thing with too sturdy of a taste, like rice vinegar or balsamic, however you might want to watch out as a result of it may throw off the stability of dry and moist elements.
One of the best acid to make use of for do-it-yourself baking powder is cream of tartar as a result of it additionally is available in powdered type and will not mess with the feel of your bake. Cream of tartar was really used all the best way again within the 1840s to make an early prototype of baking powder, however on the time, it was too unusual and costly for many shoppers to entry. As we speak, it is a staple in most pantries, and it’s best to have the ability to discover it at any main grocery retailer.
The acid utilized in most industrial baking powder, together with Horsford’s unique components, is monosodium phosphate, which is made through a response of calcium hydroxide and phosphoric acid. You should purchase monosodium phosphate on-line, but it surely’s not as extensively accessible as cream of tartar and is often dearer besides.