9 hours ago, Chris Hennes said:If the recipe was really from the 1830s it can't have been baking powder: the first baking-powder-like product didn't come around until 1843, and it wasn't really widely available until the mid-1850s. See this interesting Smithsonian Magazine article for details. @gfron1, how confident are you in the date on that recipe?
Hartshorn salt (ammonium carbonate), deer antler, was used as far back as the 17th century—supposedly, according to Davidson, Alan (1999), Oxford Companion to Food, Oxford: Oxford University Press, p. 372