Easy, flaky sweet potato biscuits are the perfect addition to your brunch table. Bring a nutrient boost to an indulgent treat.
In a large bowl, whisk together flour, sugar, baking powder, salt, and baking soda. With a pastry blender or two knives, cut in butter until mixture resembles coarse meal, with some pea-sized lumps of butter remaining.
In a small bowl, whisk together sweet potato puree and buttermilk; stir quickly into flour mixture until combined (do not overmix).
Turn out dough onto a lightly floured surface, and knead very gently until dough comes together but is still slightly lumpy, five or six times. (If dough is too sticky, work in up to 1/4 cup additional flour.) Shape into a disk, and pat to an even 1-inch thickness. With a floured 2-inch biscuit cutter, cut out biscuits as close together as possible. Gather together scraps, and repeat to cut out more biscuits (do not reuse scraps more than once).