Bake this irresistible Rhubarb Custard Cake at home. Made with yellow cake, water, vegetable oil and eggs. Easy step-by-step instructions included.
This Rhubarb Custard Cake relies on simple, everyday ingredients such as water, for cake mix, vegetable oil, for cake mix, eggs, for cake mix and rhubarb, chopped. It comes together quickly and makes 4 servings, at about 652 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 Custard 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