The most basic version of Irish soda bread has only 4 ingredients, and was cooked on an open fire or a stovetop, not baked. Make your soda bread like they did in 1840, with flour, baking soda, salt, and buttermilk. May 7, 2022May 7, 2022 · The most basic version of Irish soda bread has only 4 ingredients, and was cooked on an open fire or a stovetop, not baked. Make your soda bread like they did in 1840, with flour, baking soda, salt, and buttermilk.