Recipe
2 1/4 c. all purpose flour 
3 1/2 T. Baking powder 
1 t. Salt
2 t. sugar
6 T. cold butter
3/4 c. buttermilk
3/4 c.completely mashed baked  sweet potato 
 1 tsp cinnamon 
add together all dry ingredients 
cut in cold butter until completely incorporated
add milk and sweet potatoes and mix 
pour out on floured  board and fold over together 4 times to insure nice flakiness
cut out and place on greased pan 
 brush with 1 beaten egg yolk and 1 t. water
bake at 350 25-30  minutes 
brush with melted butter 
ENJOY
make 12-20 biscuits