Rhubarb dump cake is one of the easiest springtime desserts you can make, using a cake mix and a handful of other SIMPLE ingredients in a few EASY steps! 
Rhubarb is a delicious fruit for springtime desserts, which means this rhubarb dump cake recipe is perfect for your next springtime Sunday dinner!
What is a dump cake?
A dump cake gets its name from the baking process, which is simply to “dump,” or combine, the ingredients layer by layer into a baking dish, and then bake. Dump cakes are easy to make from scratch, most often because they use a store-bought cake mix which allows you to easily add the ingredients to a baking dish.
Ingredients for Rhubarb Dump Cake
This rhubarb dump cake uses a store-bought cake mix, fresh rhubarb, and just a few other simple ingredients:
- 4 cups sliced rhubarb
- 1 cup granulated sugar
- 1 box moist yellow cake mix
- 1 cup water
- 3/4 cup (12 Tbsp.) unsalted butter
How to make Rhubarb Dump Cake
Rhubarb dump cake is one of the easiest desserts you can make, following these easy steps:
- Preheat oven to 350°F.
- Grease a 9″ by 13″ baking dish. Add the sliced rhubarb to the baking dish and spread to cover the bottom of the dish.
- Pour the granulated sugar over the top of the sliced rhubarb.
- Next, spread the yellow cake mix over the top of the rhubarb and sugar.
- Pour the water over the cake mix. Then, pour the melted butter over the cake mix.
- Place in the oven and bake for 45-60 minutes or until the top is browned and a knife comes out clean from the center.
Can you freeze dump cake?
Yes, you can freeze a dump cake after baking. Cover with foil or transfer portions to an air-tight container and freeze for up to 2-3 months. We do not suggest freezing the dump cake ingredients before baking. STORING TIP: Leftover dump cake can also be refrigerated for up to one week. However, the texture will soften.
Enjoy these other easy dessert recipes!
Love this rhubarb dump cake and recipes like it? Try these other dessert favorites:
- Peach Cobbler with Cake Mix
- Carlota de Limón
- Strawberry Dump Cake with Bananas
- Apple Dump Cake with Fresh Apples
- Low Carb Cake with Strawberry Glaze
- Key Lime Pie Squares
- Gluten-Free Key Lime Bars
- Lemon Blueberry Shortbread Tart
Want to cook more with rhubarb?
Try these easy rhubarb recipes:
- Strawberry Rhubarb Crisp
- Rhubarb and Apple Crumble
- Rhubarb Muffins
- Stewed Rhubarb
- Rhubarb Chutney
- Rhubarb Steamed Pudding
Dump cakes are such an easy dessert to make, and rhubarb is perfect for springtime. If you’re looking for an easy dessert for Easter, Mother’s Day, brunch, or for after enjoying Sunday supper, this rhubarb dump cake is a perfect choice. We would love to know what you think of this rhubarb dump cake! Let us know in the comments below!
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Rhubarb dump cake is one of the easiest springtime desserts you can make, using cake mix and a handful of other SIMPLE ingredients in a few EASY steps!
- 4 cups sliced rhubarb
- 1 cup granulated sugar
- 1 box moist yellow cake mix
- 1 cup cold water
- 3/4 cup unsalted butter melted
-
Preheat oven to 350 degrees F.
-
Grease a 9x13 baking dish. Add the sliced rhubarb to the baking dish and spread to cover the bottom of the dish.
-
Pour the granulated sugar over the top of the sliced rhubarb.
-
Next, spread the box yellow cake mix over the top of the rhubarb and sugar.
-
Pour the water over the cake mix. Then, pour the melted butter over the cake mix.
-
Place in the oven and bake for 45-60 minutes or until the top is browned and a knife comes out clean from the center.
Recipe Video
RECIPE TIP: If you're unable to find fresh rhubarb, you can use frozen rhubarb. Be sure to fully thaw before using.
RECIPE TIP: This dump cake is very moist - be sure to fully bake and check the center with a knife. You want the knife to come out clean.
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