Cut each biscuit into 4 pieces.  Mix 1 cup sugar and 1tsp cinnamon together.  Roll each piece of biscuit in the mixture until completely coated.  Stack in an angel food or bundt cake pan that has a solid bottom. Add walnuts if desired.  Mix 1 cup sugar 1.5 sticks margarine and 1.5 tsp cinnamon in a sauce pan.  Heat stirring until sugar is dissolved.  Pour over biscuits and bake at 35 degrees for 40-45 minutes. Cover with foil the last 15 minutes so it does not get too browned.  While still warm turn onto plate.  Cool completely before covering.