Easy 3-Ingredient Rhubarb Dump Cake Recipe with Perfect Buttery Crumble Topping
A simple and quick rhubarb dump cake with a buttery crumble topping that combines tangy rhubarb and sweet yellow cake mix for a nostalgic and fresh dessert.
- Prep Time: 10 minutes
- Cook Time: 45-50 minutes
- Total Time: 55-60 minutes
- Yield: 8 servings 1x
- Category: Dessert
- Cuisine: American
Ingredients
Scale
- 4 cups fresh rhubarb, chopped into 1/2-inch pieces
- 1 box (15.25 oz) yellow cake mix
- 1 cup (2 sticks) unsalted butter, sliced thin
Instructions
- Preheat your oven to 350°F (175°C).
- Wash and chop about 4 cups of fresh rhubarb into roughly 1/2-inch pieces. Optionally toss with 1-2 tablespoons sugar to soften tartness.
- Spread the rhubarb evenly in the bottom of a 9×13-inch baking dish.
- Sprinkle the entire box of yellow cake mix evenly over the rhubarb without stirring.
- Slice 1 cup (2 sticks) of unsalted butter into thin pats and arrange evenly over the cake mix.
- Bake for 45-50 minutes until the top is golden brown and bubbling around the edges. If the center looks wet, bake a few more minutes but watch to avoid overbrowning.
- Cool slightly for 10-15 minutes before serving to allow the filling to thicken.
Notes
Slice butter thinly for even melting and a crunchy topping. Do not stir cake mix into rhubarb; layering creates the unique texture. Watch baking time closely and tent with foil if edges brown too fast. Let cake cool 10-15 minutes before serving for best texture. Frozen rhubarb can be used but may release more water; drain excess liquid if needed.
Nutrition
- Serving Size: 1 slice (1/8 of cake
- Calories: 320
- Sugar: 22
- Sodium: 210
- Fat: 18
- Saturated Fat: 11
- Carbohydrates: 38
- Fiber: 2
- Protein: 3
Keywords: rhubarb dump cake, easy dessert, 3-ingredient cake, buttery crumble topping, quick rhubarb dessert, simple cake recipe