Ruth's Mile High Biscuits

Ruth's Mile High Biscuits
12 oz enriched flour (by weight)
1½ t salt
1 T sugar
1½ t baking powder
3 oz butter
¾ buttermilk
1 egg
¼-½ C water
Preheat oven to 425 degrees. Combine flour, salt, sugar, baking powder, and margarine until crumbly. Mix in buttermilk, egg, and just enough water to make a workable dough. Roll dough onto a floured cutting board about 1 inch thick. Cut with a 2-inch biscuit cutter. Place on a baking sheet and bake 12-15 minutes or until golden brown.