Angel Biscuits Recipe

1 package yeast
2 tablespoons lukewarm water
5-5 1/2 cups sifted flour
1 teaspoon baking soda
4 tablespoons sugar
1 teaspoon salt
1 cup shortening
2 cups buttermilk

Dissolve yeast in lukewarm water. Sift together dry ingredients, cut in shortening. Add yeast and buttermilk to dry mixture, roll dough to 1/2 to 3/4-inch. Cut with biscuit cutter and fold in half. Bake at 400 degrees F. for 15 to 20 minutes.