Grandma Connie's Angel Biscuits

My girls love these biscuits and I love making something that my grandmother used to make!  They are very easy as well.

5 1/2 cups self-rising flour
1 cup shortening (I use palm shortening or coconut oil)
1/3 cup sugar
2 cups buttermilk
1 yeast cake or package
1/4 cup warm water

Work shortening into flour; add sugar; mix with buttermilk and yeast dissolved in water.  Knead well.  Roll out any amount needed and cut with biscuit cutter.  Let rise 5 minutes.  Bake 10 minutes at 475.  Keep dough covered in fridge up to a week.