CARTA COMMERCIALE: Polveri da forno preferite di John A. Hamilton - Siracusa, NEW YORK

TRADE CARD: Favorite Baking Powder by John A. Hamilton - Syracuse, NEW YORK: Baking powder is a dry chemical leavening agent, a mixture of a carbonate or bicarbonate and a weak acid. It works by releasing carbon dioxide gas into a batter or dough through an acid–base reaction, causing bubbles in the wet mixture to expand and thus leavening the mixture.

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