Rhubarb Dump Cake

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Delicious rhubarb dump cake topped with whipped cream ready to serve.

Dessert

introduction

Rhubarb Dump Cake is a nostalgic, no-fuss dessert that delivers bright-tart fruit and buttery cake without a lot of hands-on work. This version is quick enough for weeknights, crowd-friendly for potlucks, and perfect topped with vanilla ice cream for that Pinterest-ready photo. For another bright, zesty dessert idea, try the coconut-lime cupcakes which pair nicely for summer gatherings.

Why You’ll Love This Rhubarb Dump Cake :

  • Fast prep — toss, sprinkle, and bake in under 10 minutes of hands-on time.
  • Big flavor — tangy rhubarb balances sweet cake mix for vibrant taste.
  • Family-friendly — a simple crowd-pleaser that kids and adults adore.
  • Make-ahead friendly — reheats well and keeps for a few days in the fridge.
  • Versatile — swap fruit or cake mix to change the flavor profile quickly.

Ingredients Needed :

Fruit

  • 4 cups chopped rhubarb (fresh or thawed frozen)

Sweeteners & Gelatin

  • 1 cup granulated sugar
  • 1 (3 oz) package strawberry gelatin (Jell-O)

Cake & Toppings

  • 1 box yellow cake mix (dry mix only)

Liquids & Fats

  • 1 cup water
  • ½ cup unsalted butter, melted

Rhubarb Dump Cake

Step-by-Step Instructions :

  1. Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking dish.
  2. Layer the chopped rhubarb evenly in the bottom of the dish and sprinkle the sugar over it.
  3. Sprinkle the strawberry gelatin powder over the rhubarb.
  4. Add the dry yellow cake mix on top without stirring—just cover evenly.
  5. Drizzle the water and melted butter over the cake mix, making sure all areas are moistened.
  6. Bake for 45–50 minutes until golden and bubbly around the edges.
  7. Let it rest for 10 minutes before serving; serve warm with vanilla ice cream if desired.

Serving Suggestions Rhubarb Dump Cake

  • Serve warm with a scoop of vanilla ice cream or whipped cream and a sprinkle of chopped toasted almonds.
  • For a brunch-friendly spread, slice and serve alongside lighter sweets like a chocolate cake roll trifle to offer both fruity and chocolatey options.
  • Plate with fresh berries or a dusting of powdered sugar for an elevated look.

Tips for Success Rhubarb Dump Cake

  • Use evenly chopped rhubarb so it cooks uniformly — 1/2-inch pieces work well.
  • If rhubarb is very tart, increase sugar by 2–3 tablespoons to taste.
  • Don’t mix the layers — the magic is the dry cake mix forming a crumbly topping as it bakes.
  • Melt the butter completely and drizzle slowly to ensure even coverage.
  • To reheat, cover with foil and warm at 325°F for 15–20 minutes or microwave individual portions.
  • For meal-prep dessert ideas and make-ahead breakfasts, consider rotating with recipes like Carrot Cake Overnight Oats for variety in your weekly plan.

variation (if any)

  • Strawberry-Rhubarb: swap half the rhubarb for chopped strawberries for a classic combo.
  • Crumb-Topping: stir 1 cup of old-fashioned oats and 1/2 cup brown sugar into the cake mix for extra texture.
  • Gluten-Free: use a gluten-free yellow cake mix.
  • Nutty Crunch: sprinkle chopped pecans or walnuts over the top before baking.

Rhubarb Dump Cake

FAQs

Q: Can I use frozen rhubarb?
A: Yes — use thawed and drained frozen rhubarb. Pat it slightly dry so the dessert doesn’t become too watery.

Q: How do I store leftovers?
A: Cover and refrigerate up to 4 days. Reheat in the oven or microwave before serving.

Q: Can I halve the recipe?
A: Yes — bake in an 8×8-inch dish and reduce baking time slightly; start checking at 30–35 minutes.

Q: Is the cake mix fully incorporated into the filling?
A: No — you should not stir. The dry mix bakes into a crisp, cake-like topping while the rhubarb cooks beneath.

Q: Can I add spices?
A: Absolutely — a teaspoon of ground cinnamon or 1/4 tsp nutmeg mixed into the cake mix can add warmth.

Print
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Rhubarb Dump Cake

A nostalgic and easy dessert featuring tangy rhubarb and buttery cake, perfect for any occasion.

  • Total Time: 60 minutes
  • Yield: 12 servings 1x

Ingredients

Scale
  • 4 cups chopped rhubarb (fresh or thawed frozen)
  • 1 cup granulated sugar
  • 1 (3 oz) package strawberry gelatin (Jell-O)
  • 1 box yellow cake mix (dry mix only)
  • 1 cup water
  • ½ cup unsalted butter, melted

Instructions

  1. Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking dish.
  2. Layer the chopped rhubarb evenly in the bottom of the dish and sprinkle the sugar over it.
  3. Sprinkle the strawberry gelatin powder over the rhubarb.
  4. Add the dry yellow cake mix on top without stirring—just cover evenly.
  5. Drizzle the water and melted butter over the cake mix, making sure all areas are moistened.
  6. Bake for 45–50 minutes until golden and bubbly around the edges.
  7. Let it rest for 10 minutes before serving; serve warm with vanilla ice cream if desired.

Notes

Use 1/2-inch pieces of rhubarb for even cooking. Increase sugar if rhubarb is too tart.

  • Author: jayne
  • Prep Time: 10 minutes
  • Cook Time: 50 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Nutrition

  • Serving Size: 1 serving
  • Calories: 320
  • Sugar: 20g
  • Sodium: 300mg
  • Fat: 10g
  • Saturated Fat: 5g
  • Unsaturated Fat: 5g
  • Trans Fat: 0g
  • Carbohydrates: 48g
  • Fiber: 2g
  • Protein: 3g
  • Cholesterol: 20mg

Keywords: rhubarb, dump cake, dessert, easy recipe, summer dessert

Tags:

Cake Recipes / dump cake / easy dessert / rhubarb desserts / rhubarb recipes

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