Dissolve soda in buttermilk; stir well. Combine cornmeal, sugar, and salt; add buttermilk mixture, sweet potato, egg, and drippings, mixing well.
Shape into balls, using 1 tablespoon batter per ball. Place on greased griddle, and lightly press into circles with the back of a fork. Bake at 400° for 20 minutes.
Oxmoor House Homestyle Recipes