Roll dough to ½ inch thickness; cut with 2-2.5 inch biscuit cutter.
Place biscuits about 1 inch apart on the prepared baking sheet.
Bake at 400 degrees for 14-15 minutes in traditional oven or at 350 in convection oven for 12-13 minutes, or until lightly browned.
Brush with melted butter, if desired.
Notes
The yield will depend on the size of your biscuit cutter. I got 18 with a 2-inch cutter, but you'll only get 12 to 14 with a 2.5-inch cutter.Prep time does not include cooking the sweet potato. If you're using canned or boiled sweet potatoes, the dough may be sticky. Add flour 1 tablespoon at a time until it's easy to handle.To freeze unbaked biscuits, freeze them on a baking sheet until solid, then transfer to a freezer bag for up to 3 months. Bake from frozen, adding 2 to 3 minutes to the baking time.You can swap buttermilk for the milk, cup for cup.To make ahead, refrigerate cut, wrapped biscuits for up to 48 hours before baking.