Bake this irresistible Rhubarb Upside-Down Cake at home. Made with rhubarb, sugar, O and marshmallows. Easy step-by-step instructions included.
This Rhubarb Upside-Down Cake relies on simple, everyday ingredients such as to 7 c. diced rhubarb, sugar, (3 oz.) strawberry jell-o and miniature marshmallows. It comes together quickly and makes 4 servings, at about 356 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.
Whether you're rounding off a family dinner, bringing a treat to a gathering, or simply satisfying a sweet craving, this Rhubarb Upside-Down Cake delivers. Serve it warm or at room temperature, and add a scoop of ice cream or a spoonful of whipped cream for an extra-special finish.
Updated Jun 30, 2026