01 -  Preheat oven to 425°F. Line a baking sheet with parchment paper. 
 02 -  In a large mixing bowl, whisk together all-purpose flour, baking powder, baking soda, kosher salt, garlic powder, and onion powder until evenly combined. 
 03 -  Add cold unsalted butter to the flour mixture. Using a pastry cutter or fork, incorporate butter until mixture forms coarse crumbs. 
 04 -  In a separate bowl, stir together mashed sweet potato, cold buttermilk, ranch dressing, buffalo hot sauce, dill pickles, and fresh dill until well blended. 
 05 -  Pour wet ingredients into the bowl with dry ingredients. Gently fold together just until a soft dough forms, taking care not to overmix. 
 06 -  Turn dough onto a lightly floured work surface. Pat dough into a rectangle approximately 1-inch thick. 
 07 -  Using a 2.5-inch biscuit cutter, press out rounds. Gather and re-roll any scraps as needed to make 10 biscuits. 
 08 -  Place shaped biscuits onto prepared baking sheet so they touch slightly for tender sides. Bake in preheated oven for 16 to 18 minutes, until golden brown. 
 09 -  Remove biscuits from oven. Immediately brush tops with melted butter and sprinkle with chopped dill or parsley if desired. Serve warm.