Rhubarb Surprise Cake

Prepare one yellow cake mix according to directions.

Put in 9 x 13 cake pan.

Mix together 4 1/2 cups diced rhubarb and 1 1/2 cups sugar. Mix until the rhubarb is coated with the sugar.

Spread evenly over the cake.

Pour 1 pint of unwhipped whipping cream over cake and rhubarb mixture.

Bake 1 hour at 350 degrees