Preheat oven to 450°. Line a rimmed baking sheet with parchment paper.
In a large bowl, whisk together flour, brown sugar, baking powder, salt, and baking soda. Using a pastry blender, cut in cold butter until mixture is crumbly; stir in sweet potato. Gradually stir in buttermilk just until dry ingredients are moistened.
On a lightly floured surface, gently knead dough 5 times; pat dough to 1-inch thickness. Using a 3-inch round cutter, cut dough, gently rerolling scraps to use all dough. Place biscuits on prepared pan.
Bake until lightly browned, about 12 minutes. Let cool on pan for 5 minutes; serve warm with Pear Sage Butter.
Recipe by Paula Deen Magazine at https://pauladeenmagazine.com/second-sweet-potato-biscuits-recipe/