1 pkg. (2-layer size) yellow cake mix
4 c. rhubarb, chopped
1 c. sugar
1 pt. whipping cream

Prepare cake mix according to directions. Turn into lightly greased 9 x 13 x 2-inch pan. Cover with rhubarb, then the sugar. Then the cream last over all. Bake at 350 degrees, 50 to 60 minutes, or until cake springs back when lightly touched. Cream and rhubarb form a custard on the bottom. Cut into 15 to 18 squares. Serve upside down with custard on top.