1 stick butter
5 c. rhubarb (or 2 1/4 lb.) - I use more
1 c. sugar
1/4 c. cornstarch
1/2 tsp. cinnamon
3 tbsp. water
1/2 c. coconut
1 sm. box white or yellow Jiffy cake mix

Butter bottom and sides of 9x13 cake pan. Spread rhubarb over bottom of pan. Combine sugar, cornstarch, cinnamon, and then blend in water. Bring to a boil.

Pour over the rhubarb. Sprinkle cake mix on top. Dot with butter on top of this. Sprinkle coconut on top. Bake uncovered for 1 hour at 350 degrees.