soda breadnoun [ U ]
uk/ˈsəʊ.də ˌbred//ˈsoʊ.də ˌbred/bread made with baking soda (= a white powder that makes food rise when it is baked) rather than with yeast:
Irish soda bread
Another traditional food from Ireland is soda bread, made with flour, soda, buttermilk, and salt.