This rhubarb custard cake is a deliciously indulgent treat that’s incredibly easy to whip up. Bursting with sweet and tangy flavors, it’s perfect for any occasion. Family-friendly and kid-approved, this cake will quickly become your go-to dessert!
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Rhubarb Custard Cake Recipe
This simple yet satisfying recipe combines the tartness of rhubarb with a creamy custard-like topping, creating a delightful dessert that everyone will love. It’s the ideal way to showcase fresh rhubarb during its peak season!

Ingredients for Rhubarb Custard Cake
Yellow Cake Mix
Start with one package of yellow cake mix, which serves as the delicious base of this cake. It provides a light, fluffy texture that perfectly complements the tartness of the rhubarb.
Fresh or Frozen Rhubarb
You’ll need 4 cups of chopped rhubarb, either fresh or frozen. If using frozen, ensure you thaw and drain it before adding. This tart vegetable adds a unique flavor that pairs beautifully with the sweetness of the sugar and cream.
Sugar
One cup of sugar balances the tartness of the rhubarb while helping to create a lovely caramelized layer on top. It’s the sweet touch that ties all the flavors together.
Heavy Whipping Cream
Adding one cup of heavy whipping cream is what gives this cake its custard-like texture. The cream creates a rich, soothing layer that contrasts beautifully with the cake base.
Optional Garnishes
For an extra dash of elegance, consider garnishing with whipped cream and fresh mint. These additions not only enhance the presentation but also bring in a refreshing note.
How to Make Rhubarb Custard Cake
Step 1: Prepare the Cake Batter
Begin by preheating your oven to 350°F. Prepare the yellow cake mix according to the package instructions, creating a smooth, fragrant batter that’s ready for baking.
Step 2: Layer the Rhubarb and Sugar
Pour the prepared batter into a greased 13×9-inch baking pan. Next, evenly sprinkle the chopped rhubarb and sugar over the top. This layering is key to achieving that perfect balance of flavors.
Step 3: Pour the Cream and Bake
Slowly pour the heavy cream over the mixture. Bake for 40 to 45 minutes until the top is golden brown and set. Once baked, allow the cake to cool on a wire rack for 15 minutes before slicing and serving. Optionally, garnish with whipped cream and mint for a delightful finish!
Variations of Rhubarb Custard Cake
Using Different Fruits
Feel free to experiment with other fruits, such as peaches or strawberries. Each fruit brings its unique flavor profile, adding a twist to the original recipe.
Experimenting with Cake Mix Flavors
Why not try different cake mix flavors? Red velvet or spice cake mixes can give your rhubarb custard cake a whole new personality.
Adding Nuts or Dried Fruits
Add up to 1 cup of nuts or dried fruits for a delightful texture contrast. Walnuts or dried cranberries can make this cake even more interesting!
Storing Rhubarb Custard Cake
To keep your rhubarb custard cake fresh, store it in the refrigerator. It will last for four to five days, making it a great make-ahead dessert.
How Long Does Rhubarb Custard Cake Last?
Leftover rhubarb custard cake is best enjoyed within four to five days when stored properly. After that, the texture may start to decline.
Can You Freeze Rhubarb Custard Cake?
Yes, you can freeze this cake! Wrap it tightly and store it in the freezer for up to three months. Just make sure to thaw it overnight in the refrigerator before serving.
Tips for Making the Best Rhubarb Custard Cake
Using Fresh vs. Frozen Rhubarb
Both fresh and frozen rhubarb work well in this recipe. If using frozen, remember to thaw and drain it thoroughly to prevent excess moisture in your cake.
Best Time to Serve the Cake
This rhubarb custard cake is delightful any time of day. Serve it warm with a scoop of vanilla ice cream or chill it for a refreshing summer dessert. It pairs wonderfully with lemonade or sweet tea!
FAQs
What ingredients do I need for Rhubarb Custard Cake?
You will need yellow cake mix, chopped rhubarb, sugar, and heavy whipping cream. Optionally, you can add whipped cream and mint for garnish.
How do I make Rhubarb Custard Cake step by step?
Start by preparing the cake mix, layer rhubarb and sugar, pour cream and bake at 350°F for 40-45 minutes.
Can I make Rhubarb Custard Cake ahead of time?
Yes, you can prepare this cake ahead of time and store it in the refrigerator for later enjoyment.
How should I store leftover Rhubarb Custard Cake?
Store leftover cake in the refrigerator for up to 4-5 days or freeze it for up to three months.
Related Recipes to try
- Delicious Peach Cobbler
- Classic Strawberry Shortcake
- Moist Chocolate Cake
- Lemon Drizzle Cake
- Rich Carrot Cake
Conclusion
This rhubarb custard cake is a must-try dessert that’s simple yet delicious. For more inspiration, check out amazing recipes on Pinterest. Your family will love this delightful treat, making it a perfect addition to any gathering!

Rhubarb Custard Cake: A Delightfully Simple Dessert
Equipment
- oven
- 13×9-inch baking pan
- mixing bowl
- wire rack
Ingredients
- 1 package yellow cake mix regular size
- 4 cups chopped fresh or frozen rhubarb
- 1 cup sugar
- 1 cup heavy whipping cream
- whipped cream and fresh mint optional for garnish
Instructions
- Preheat the oven to 350°F and prepare the yellow cake mix according to the package instructions.
- Pour the batter into a greased 13×9-inch pan, sprinkle rhubarb and sugar on top, and pour heavy cream over the mixture.
- Bake for 40 to 45 minutes until golden brown, then cool for 15 minutes before serving; garnish if desired.




