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Homemade rhubarb dump cake with golden crumble topping and a scoop of vanilla ice cream, served in a white dish with a wooden spoon.

Rhubarb Dump Cake

A no-fuss, foolproof rhubarb dump cake that delivers a crisp golden topping over sweet-tart fruit with almost no effort. Perfect for beginners, last-minute desserts, or anyone who "can't bake"—just dump, bake, and enjoy!
5 from 1 vote
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Course: Dessert
Cuisine: American
Keyword: 3 ingredient rhubarb dump cake, Blueberry rhubarb dump cake, Rhubarb Dump Cake, Rhubarb dump cake pioneer woman, Rhubarb dump cake with cake mix, Rhubarb dump cake with jello recipe, Rhubarb dump cake without jello, Rhubarb pineapple Dump cake
Prep Time: 10 minutes
Cook Time: 50 minutes
Cooling Time: 15 minutes
Total Time: 1 hour 15 minutes
Servings: 12
Calories: 320kcal
Cost: $11

Equipment

  • 1 9x13 baking dish (Glass or metal)
  • 1 Sharp knife (For chopping rhubarb)
  • 1 Cutting board
  • 1 Measuring cups (For sugar and liquid)
  • 1 Spoon or spatula (For serving)

Ingredients

  • 4 cups rhubarb - fresh, chopped into ½" pieces
  • 1 cup granulated sugar
  • ½ cup water - or fruit juice
  • 1 teaspoon vanilla extract - optional but recommended
  • 1 box yellow cake mix - (standard size, ~15.25 oz)
  • ¾ cup unsalted butter - cold, sliced thin

Instructions

  • Preheat oven to 350°F and grease a 9x13-inch baking dish
  • Chop rhubarb and spread evenly in the dish
  • Sprinkle sugar, pour water and vanilla over rhubarb
  • Evenly dump cake mix on top—do not stir
    A hand pours water over yellow cake mix and melted butter in a white baking dish to prepare a homemade rhubarb dump cake.
  • Arrange sliced cold butter over dry cake mix
  • Bake until golden and bubbly; let cool before serving
    Golden-brown homemade rhubarb dump cake in a white dish, with juicy red rhubarb bubbling through a crisp, rustic crust.

Notes

Nutrition information is automatically calculated and should be considered an approximation. Actual values may vary based on specific ingredients used and portion sizes

Nutrition

Serving: 151g | Calories: 320kcal | Carbohydrates: 45g | Protein: 2g | Fat: 15g | Saturated Fat: 9g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Trans Fat: 0.5g | Cholesterol: 35mg | Sodium: 300mg | Potassium: 150mg | Fiber: 1g | Sugar: 28g | Vitamin A: 400IU | Vitamin C: 4mg | Calcium: 80mg | Iron: 1mg