Step 1

Preheat oven to 350 degrees.

Step 2

Lightly grease a 9×13 – inch baking pan.

Step 3

Prepare yellow cake batter according to package directions.

Step 4

Pour batter into prepared pan.

Step 5

Spread rhubarb evenly over batter.

Step 6

Sprinkle sugar over rhubarb, and pour whipping cream over everything.

Step 7

Bake 1 hour.

Step 8

Remove cake from oven; cool, cover, and refrigerate overnight.

Step 9

Simple, seasonal, and just right for sharing.