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Bicarbonate Of Soda
Sodium bicarbonate, a white alkaline powder. When it meets an acid and a liquid it releases carbon dioxide, which lifts a batter.

Origin
Refined from natural soda deposits and from industrial processes.
Flavour
Soapy and bitter if any is left unreacted.
How to use it
Pair it with an acid already in the recipe, such as buttermilk, yoghurt, or treacle. Do not add extra for luck.
Storage
Sealed and dry. It lasts, but an old box is weaker.
Recipes using it
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