Mix sugar & cinnamon in a large resealable plastic bag. Cut biscuits into quarters. Shake 6-8 biscuit pieces in the mixture. Arrange the pieces in the bottom of the pan.
Sprinkle each layer with raisins & optional nuts. Continue the process until all biscuit pieces are coated & placed in the pan.
In a small pot, over medium heat, melt the margarine with the brown sugar. Boil for 1 minute. Pour over biscuits.
Bake for 35 minutes. Remove from oven & let cool in pan for 10 minutes. Turn out onto serving dish/platter.
Recipe by Food Askew at http://foodaskew.net/2011/12/easy-monkey-bread/