1Mix together flour, soda, salt, and baking powder.
2Add shortening. Cut into flour mixture until it resembles coarse cornmeal.
3Dissolve yeast and sugar in warm water. Add to flour mixture, then add buttermilk. Knead together until dough forms.(I cheat. I use the dough hook on my heavy duty stand mixer.) It will be sticky.
4Transfer the amount of dough needed to a floured surface and knead until it reaches an elestic quality.
5Roll out to desired thickness and cut biscuits out. Make a ball out of scraps and roll out again and cut biscuits again. Place on a lightly greased pan. Bake at 400 degrees for about 15 minutes or until golden brown.
6Remember that the more you roll dough the tougher it gets.