Rhubarb Dump Cake Recipe

This Rhubarb Dump Cake Recipe is one of the easiest desserts you’ll ever bake just layer the ingredients, pop it in the oven, and let the magic happen. Fresh or frozen rhubarb bakes into a sweet-tart filling beneath a buttery, golden cake topping. The result? A cozy, old-fashioned dessert that tastes like spring in a dish. Pair it with a scoop of vanilla ice cream or a refreshing sip like our Coconut Mojito Recipe for the perfect balance of rich and fresh flavors.

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Prep Time 10

Cook Time 45

Total Time 55

Servings: 8

Course: Breakfast, Dessert

Cuisine: American

Calories: 285

Ingredients Equipment Method Notes

Ingredients

4 cups rhubarb chopped (fresh or frozen, no need to thaw)
1 cup granulated sugar adjust to taste if your rhubarb is sweet
1 package yellow cake mix 15.25 oz
1 cup water or use apple juice for a fruity touch
½ cup unsalted butter melted
1 teaspoon vanilla extract optional but adds depth
Pinch of salt to balance sweetness
Toppings optional: vanilla ice cream, whipped cream, or a sprinkle of cinnamon sugar

Equipment

9x13-inch baking dish
Mixing spoon or spatula
Measuring cups and spoons
Small saucepan (for melting butter)
Oven mitts (it gets golden hot 🔥)

Method

Preheat the oven to 350°F (175°C). Lightly grease a 9×13 inch baking dish.
Add rhubarb and sugar. Spread the chopped rhubarb evenly on the bottom of the dish and sprinkle sugar on top.
Add cake mix. Pour the dry cake mix evenly over the rhubarb and sugar layer — do not stir.
Add liquid and butter. Pour the water (evenly distributed) over the top, then drizzle the melted butter across the entire surface.
Bake for 45 to 50 minutes. The top should be golden brown and crispy around the edges.
Cool slightly before serving. Enjoy warm or chilled either way, it melts in your mouth.

Notes

If you’re new to dump cakes, this is the ultimate beginner-friendly bake no mixer, no fancy steps. You can mix in a few strawberries or raspberries to make it even fruitier. For a cozy twist, serve it after a light dinner like our Chicken Long Rice Recipe or Pollo Loco Recipe.