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Easy Rhubarb Dump Cake Recipe with Perfect Buttery Crumble Topping

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A quick and easy rhubarb dump cake with a buttery, crisp crumble topping that balances tart rhubarb with sweet richness. Perfect for a comforting dessert with minimal effort.

Ingredients

Scale
  • 4 cups fresh rhubarb, chopped (about 500 grams / 1.1 lbs)
  • 1 cup granulated sugar (200 grams)
  • 1 box yellow cake mix (15.25 oz / 432 grams)
  • 1 cup unsalted butter, cold and cut into small cubes (227 grams / 8 oz)
  • 1 teaspoon cinnamon
  • 1 teaspoon vanilla extract (optional)
  • Pinch of salt

Instructions

  1. Preheat your oven to 350°F (175°C).
  2. Wash and chop about 4 cups (500 g) of rhubarb into 1/2-inch pieces. Toss with 1 cup (200 g) granulated sugar and 1 teaspoon vanilla extract if using. Let sit for 5 minutes.
  3. Transfer the rhubarb mixture to a greased 9×13-inch baking dish and spread evenly.
  4. In another bowl, combine the yellow cake mix, 1 teaspoon cinnamon, and a pinch of salt. Cut in 1 cup (227 g) cold unsalted butter cubes using a pastry cutter or forks until mixture resembles coarse crumbs with pea-sized butter bits.
  5. Sprinkle the crumble topping evenly over the rhubarb without pressing down.
  6. Bake for 45-50 minutes until edges bubble and topping is golden brown. Tent with foil for the last 10 minutes if topping browns too quickly.
  7. Let the cake rest for 15 minutes before serving to thicken the juices.
  8. Serve warm, optionally with vanilla ice cream or whipped cream.

Notes

Use cold butter cut into the dry cake mix for a flaky crumble topping. If rhubarb is very tart, add an extra 1/4 cup sugar. Tent with foil if topping browns too fast. For dairy-free, substitute butter with solid coconut oil and use a dairy-free cake mix. Leftovers keep well refrigerated for up to 4 days and freeze for up to 2 months.

Nutrition

Keywords: rhubarb dump cake, easy dessert, crumble topping, quick cake, buttery crumble, rhubarb dessert, spring dessert

Find it online: https://zoeplate.com/easy-rhubarb-dump-cake-recipe-with-perfect-buttery-crumble-topping/