4-Ingredient Blueberry Dump Cake

Why Make This Dump Cake?

  • Only 4 simple ingredients

  • No mixing bowl required – dump everything directly into the baking dish

  • Ready in under 1 hour

  • Buttery, fruity, and perfectly sweet


Ingredients

  • 2 cans (21 ounces / 600 g each) blueberry pie filling

  • 1 box (15.25 ounces / 432 g) yellow cake mix

  • ½ cup (1 stick / 113 g) unsalted butter, sliced into thin pats

  • ½ cup chopped pecans or walnuts (optional, but highly recommended)


Equipment Needed

  • 9×13-inch baking dish

  • Spatula or back of a spoon

  • Aluminum foil (optional)


Method

1. Preheat the oven

  • Preheat your oven to 175°C (350°F).

2. Dump the blueberry filling

  • Open both cans of blueberry pie filling.

  • Dump them directly into the 9×13-inch baking dish.

  • Spread evenly with a spatula or the back of a spoon.

3. Dump the cake mix

  • Sprinkle the dry yellow cake mix evenly over the blueberry filling.

  • Do not stir or mix it in. The cake mix stays on top as a dry layer.

4. Add the butter

  • Slice the cold butter into thin pats (about ¼ inch thick).

  • Distribute the butter pats evenly over the cake mix. Cover as much of the surface as possible.

5. Add the nuts (optional)

  • Sprinkle the chopped pecans or walnuts evenly over the butter.

6. Bake

  • Place the baking dish in the preheated oven.

  • Bake for 40 to 45 minutes, until the top is golden brown and the edges are bubbly.

  • If the top is browning too quickly, loosely cover with aluminum foil for the last 10 to 15 minutes.

7. Cool and serve

  • Let the dump cake cool for at least 10 to 15 minutes before serving. The filling will be very hot.

  • Serve warm, spooned into bowls.

  • Top with vanilla ice cream or whipped cream if desired.


Storage

  • Refrigerator – store covered in the baking dish or in an airtight container for up to 5 days.

  • Freezer – freeze for up to 2 months. Thaw overnight in the refrigerator before reheating.

  • Reheating – warm individual portions in the microwave for 30 to 45 seconds, or reheat the whole dish in a 175°C (350°F) oven for 10 to 15 minutes.


Important Notes

  • Do not stir – the cake mix must stay on top of the fruit filling. Stirring creates a gummy, uneven texture instead of a buttery, crisp topping.

  • Use cold butter – cold butter pats melt slowly during baking, creating the crumbly, golden topping. Melted butter will soak into the cake mix too quickly and make it dense.

  • No eggs, milk, or water are needed – the butter provides enough moisture. Adding extra liquid will make the cake soggy.


Variations

  • Cherry dump cake – substitute cherry pie filling for the blueberry.

  • Peach dump cake – use peach pie filling or canned sliced peaches in heavy syrup (drain the syrup first).

  • Apple dump cake – use apple pie filling and add 1 teaspoon of cinnamon to the cake mix.

  • Mixed berry dump cake – use two different pie fillings, such as blueberry and cherry.

  • Lemon blueberry dump cake – use lemon cake mix instead of yellow cake mix.

  • Chocolate blueberry dump cake – use chocolate cake mix for a surprising flavor combination.


Tips for Best Results

  • Use a 9×13-inch baking dish precisely – a smaller dish will cause the cake to overflow; a larger dish will make the topping too thin.

  • Spread the cake mix evenly – clumps of dry mix will remain powdery after baking.

  • Cover the cake mix completely with butter – any dry patches of cake mix will stay dusty and uncooked.

  • Let it rest before serving – the filling sets up slightly as it cools, making it easier to spoon out.

  • Serve warm, not piping hot – the blueberry filling can burn your mouth. Wait at least 10 minutes after removing from the oven.

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