1 yellow cake mix
4 Cups rhubarb — finely chopped
1 1/2 Cups sugar
1 Cup whipping cream
Lightly grease a 9×13 cake pan.
Mix cake mix as on the package; add one stick of melted butter. Pour cake mix into the prepared pan. Pour rhubarb over the cake mix; pour sugar over the rhubarb. Slowly pour the cream over the sugar. Important, do not stir. Bake at 350 degrees for 1 hour or until rhubarb is tender and dessert is bubbling.
Top with whipped cream, if desired.