Rhubarb Dump Cake is an easy-to-make dessert that combines the tartness of rhubarb with a sweet cake topping, creating a delightful dish that is perfect for any occasion. This simple recipe requires minimal prep time and is sure to impress your family and friends.

Why Make This Recipe
Rhubarb Dump Cake is the ideal dessert when you want something quick and delicious. It’s a wonderful way to use fresh or frozen rhubarb while delivering layers of flavor in each bite. Whether served warm with a scoop of ice cream or enjoyed by itself, this dish is satisfying and comforting. Plus, it can be made with just a few ingredients that you likely already have in your pantry.
How to Make Rhubarb Dump Cake
Making Rhubarb Dump Cake is straightforward and requires only a few simple steps. Follow this guide to create a delightful dessert that will make your taste buds dance!
Ingredients
- 4 cups chopped fresh or frozen rhubarb
- 1 cup granulated sugar
- 1 (3 oz) box strawberry or raspberry gelatin (Jell-O)
- 1 box yellow cake mix
- 1 cup cold water
- 1/2 cup (1 stick) butter, melted

Instructions
- Preheat your oven to 350°F (175°C).
- In a large mixing bowl, combine the chopped rhubarb and granulated sugar. Spread this mixture evenly in a greased baking dish.
- Sprinkle the dry gelatin powder over the rhubarb mixture.
- Pour the dry yellow cake mix evenly on top of the gelatin and rhubarb layers.
- Drizzle the cold water over the cake mix, ensuring to cover it as evenly as possible.
- Finally, pour the melted butter over the top.
- Bake in the preheated oven for about 45-50 minutes, or until the cake is golden brown. Serve warm, optionally with whipped cream or ice cream.
How to Serve Rhubarb Dump Cake
Rhubarb Dump Cake is best enjoyed warm from the oven. Serve it in bowls and consider adding a dollop of whipped cream or a scoop of vanilla ice cream on top. This enhances the flavor and adds a creamy texture to the tart cake. It can be served as a delightful dessert for dinner parties, family gatherings, or simply as a sweet treat for yourself!
How to Store Rhubarb Dump Cake
If you have any leftovers (which is unlikely!), store them in an airtight container in the refrigerator for up to three days. You can reheat individual servings in the microwave for a few seconds or enjoy it cold as a refreshing dessert.
Tips for Success with Rhubarb Dump Cake
Choose the Right Rhubarb: If using fresh rhubarb, select stalks that are firm and vibrant in color. Avoid any that are soft or wilted.
Adjust the Sweetness: Depending on your taste preference, you can adjust the amount of sugar. If you prefer a more tart dessert, you might reduce the sugar slightly.
Even Distribution: Make sure to evenly distribute the dry gelatin and cake mix over the rhubarb for consistent baking.
Watch the Baking Time: Ovens can vary, so keep an eye on your dump cake while it’s baking. Look for a golden-brown top and bubbling edges.

Variations
While the traditional Rhubarb Dump Cake is delicious on its own, you can try some variations to suit your palate:
Mixed Berry Dump Cake: Add other berries like blueberries or strawberries for a fruity twist.
Use Different Gelatin Flavors: Experiment with different gelatin flavors like lemon or peach, which can complement the tartness of rhubarb nicely.
Add Nuts: Mix in some chopped nuts like pecans or walnuts for added crunch and flavor.
Frequently Asked Questions
1. Can I use frozen rhubarb in this recipe?
Absolutely! Frozen rhubarb works perfectly in this recipe. Just make sure to chop it while still partially frozen for easier handling.
2. Is it necessary to use gelatin?
Gelatin adds a distinct flavor and helps to hold the layers together, but if you don’t have it on hand or prefer not to use it, you can skip it. The cake will still be delicious!
3. Can I make this cake ahead of time?
Yes, you can prepare the Rhubarb Dump Cake ahead of time and store it in the refrigerator. Just be sure to reheat before serving for the best flavor and texture.
For more delicious recipes and tips, check out our Tasty Labo blog, where we explore the joys of cooking and baking!
Rhubarb Dump Cake is not just a dessert; it’s a delightful mix of sweet and tart that can brighten up any meal. With this easy recipe, you can create a comforting dish that everyone will love, all while enjoying the process of baking. Happy cooking!