In plastic bag place cinnamon and only 3/4 cup of the sugar and biscuit pieces. Shake until all biscuit pieces are coated. Fill ungreased bundt pan with biscuit pieces.

Melt 1 1/2 sticks of butter in saucepan. Add 3/4 cup sugar. Pour mix over biscuit pieces. Bake covered 350 degrees 25 minutes and uncovered for 15 minutes more.