1 stick butter
1/2 c. sugar, brown sugar tastes best
1 lg. can sweet potatoes or yams or 3 small cans (you want about 27 to 29 ounces all together.
3/4 c. pecans, chopped or whole (opt.)
Place sweet potatoes, cut in large chunks on bottom of 10"x13"x2" pan. (Save juice in can.) Sprinkle most of sugar on top of potatoes. Sprinkle dry cake mix on top, cut stick of butter in chunks and place on top of cake mix. Sprinkle cinnamon to taste on top of cake mix. Sprinkle sugar to sweeten cinnamon. Add finely chopped pecans on top of cake mix.
Fill can potatoes came in with water and left over juice until can is 3/4 full (you want no more than 20 ounces of liquid roughly 2-1/4 cups. Pour over cake mix. Bake 25 to 30 minutes at 350 degrees or until top is light brown.