1 c. brown sugar
1/2 c. corn syrup
1 stick butter

Cook until blended and pour into 9"x13" pan. Cut up 5 to 6 cups rhubarb and place over syrup.

Mix 1 yellow cake mix as per package directions. Pour over rhubarb. Bake 45 minutes at 350 degrees. Let set about 5 minutes and turn upside down. Serve with whipped cream.