Preheat oven to 375°F (190°C). Line two sheet pans with parchment paper or silpats.
Add molasses, sweet potato, orange zest, ginger, and cinnamon. Mix until well combined. Mix in the buttermilk
Sift together flour, salt, baking soda, and baking powder. Stir the flour mixture into the batter until just combined. Drain raisins (if macerating) and mix them into the batter.
Form dough balls about 2 tablespoons in size and place onto the lined sheet pans (use two small spoons or a small cookie scoop is easiest), leaving space between the dough balls for them to spread.