Easy 4-Ingredient Blueberry Dump Cake
A blueberry dump cake is the dessert you make when you want something warm, fruity, and crisp on top with almost no effort. Four ingredients, one baking dish, and no mixing bowls—this is weekend dessert, stress-free.
The buttery topping bakes into a golden crust that cracks under a spoon, and the berries turn into a jammy, bubbling layer underneath. If you have vanilla ice cream in the freezer, this is exactly where it belongs.
What Makes This Blueberry Dump Cake So Good
The magic is in what you don’t do. You do not stir, you do not cream butter and sugar, and you do not dirty a mixer. You layer everything right in the baking dish and the oven handles the rest. The dry cake mix soaks up melted butter and blueberry juices as it bakes, creating a craggy, cookie-like crust and a soft, fruit-soaked base in the same pan.
It tastes like a blueberry cobbler crossed with a crumble, but much faster. The edges get chewy while the middle stays spoonably soft, and the whole thing smells like a bakery while it bakes. I have made this for last-minute guests more times than I can count, and it always disappears.
Ingredients
- 2 cans (21 oz each) blueberry pie filling: use a good brand, or swap in cherry or apple for a different version
- 1 box (15.25 oz) yellow cake mix: use the dry mix straight from the box; do not add the eggs or oil on the package
- 1 cup (2 sticks) unsalted butter, melted: salted butter works too—just skip any extra salt
- 1/2 cup chopped pecans or walnuts (optional): for a little crunch and nuttiness on top
Variations / Substitutions
- Switch the fruit: canned cherry, apple, or peach pie filling all work just as well. If using a very juicy fruit, add a tablespoon of cornstarch to the filling so it does not turn soupy.
- Switch the cake mix: spice cake mix gives it a warm, cinnamon note that pairs beautifully with blueberries. Chocolate cake mix turns it into a dark, rich dessert that feels like a black forest cobbler.
- Add a pinch of spice: toss 1 teaspoon of cinnamon or a pinch of nutmeg into the dry cake mix before scattering for a little extra warmth.
- Skip the nuts: the cake bakes up just as crisp without them, so leave them out if you prefer a smooth top.
For a from-scratch angle, try a simple Blueberry Crisp next time—it uses fresh berries and an oat streusel.
How to Make Blueberry Dump Cake
Step 1: Layer the Blueberries
Preheat the oven to 350°F (175°C). Dump both cans of blueberry pie filling into an ungreased 9×13-inch baking dish and spread it into an even layer with a spatula. The dish stays ungreased because the fruit juices and butter will create enough moisture to prevent sticking.
The filling should cover the bottom completely. If there are any gaps, just nudge the fruit around until it is even. This layer will bubble up and jam during baking.
Step 2: Scatter the Cake Mix
Sprinkle the entire box of dry yellow cake mix evenly over the blueberry filling. Use your hands or a spoon to break up any clumps, but do not stir it in. The mix needs to sit right on top of the fruit, not become a batter.
Take a moment to make sure the cake mix reaches the edges and corners. If you leave bare spots of fruit, the butter will puddle there instead of soaking into the mix, so a uniform layer matters.
Step 3: Drizzle the Butter
Pour the melted butter slowly over the dry cake mix, trying to cover as much of the surface as you can. A spoon or a spouted measuring cup makes this easier. If you miss a few small patches, that is fine—the butter will spread as it bakes.
Scatter the chopped pecans or walnuts over the top now if you are using them. The nuts toast in the oven and add a crunchy contrast to the soft fruit underneath.
Step 4: Bake Until Golden and Bubbly
Slide the dish into the preheated oven and bake for 45 to 50 minutes. The cake is done when the top looks deeply golden, the fruit is bubbling thickly around the edges, and the butter has soaked in enough that you no longer see white patches of dry mix.
Let the cake cool for 10 to 15 minutes before serving. This rest time lets the juices settle so it is easier to scoop.
Step 5: Scoop and Serve
Spoon the dump cake into bowls while it is still warm, making sure each serving gets plenty of that jammy berry layer and a piece of the buttery crust. A scoop of vanilla ice cream melting into the cracks is the only finishing touch you need.
The top stays crisp for the first hour, so aim for that window if you can. Leftovers soften a bit in the fridge, but a quick reheat in the oven brings some crunch back.
Tips for the Best Dump Cake
- Use fully melted butter, not just softened. Cold butter will not drizzle evenly and leaves dry pockets of cake mix that never absorb properly.
- Do not stir the layers. The whole point is keeping the dry mix on top so it becomes a crust. If you stir, you’ll end up with a wet, gummy batter instead of a crisp topping.
- If the center looks pale but the edges are golden at the 45-minute mark, rotate the pan and give it another 5 to 8 minutes. Every oven runs a little differently.
- For an even thicker crust, use an extra half box of cake mix and a few tablespoons more melted butter. The extra topping browns beautifully and makes the dessert a bit more substantial.
Bake times shift slightly depending on the dish you use.
| Pan size | Bake time |
|---|---|
| 9×13-inch baking dish | 45 to 50 minutes |
| 9×9-inch square dish | 55 to 60 minutes |
| 8×8-inch square dish | 60 to 65 minutes |
Storing Leftover Blueberry Dump Cake
- Refrigerate: cover the baking dish tightly or transfer leftovers to an airtight container. It keeps well for up to 4 days.
- Reheating: warm individual portions in the microwave for 30 to 45 seconds, or reheat the whole dish in a 350°F oven for 10 to 15 minutes to crisp the top again.
- Serve cold: the cake tastes great straight from the fridge too, especially for breakfast.
What To Serve With Blueberry Dump Cake
Vanilla ice cream is the classic pairing—the cold, creamy milkiness balances the sweet, warm berries. Lightly sweetened whipped cream works just as well if you want something softer. For a simpler finish, a drizzle of cold heavy cream over each bowl brings the same contrast without the extra step of whipping.
Frequently Asked Questions
Can I use frozen blueberries instead of pie filling?
Yes, but you will need to make a quick filling. Toss 5 to 6 cups of frozen blueberries with 1/2 cup of sugar, 2 tablespoons of cornstarch, and a squeeze of lemon juice. Spread that in the dish and proceed with the recipe.
Why did my dump cake turn out dry?
Dry spots usually mean the butter did not cover the cake mix evenly. Next time, drizzle the melted butter slowly and use a spoon to fill in any areas that look white before baking.
Can I use a different flavor of cake mix?
Absolutely. White cake mix, spice cake mix, and even chocolate cake mix all work. Each one gives the dessert a different personality, so pick the one that sounds good with blueberries.
Does dump cake need to be refrigerated?
Once it cools completely, yes. The fruit and butter make it too moist to leave at room temperature safely for more than a few hours.
Can I make this dairy-free?
Yes. Use a dairy-free buttery stick or refined coconut oil in place of the melted butter, and check that your cake mix is dairy-free. The texture will be slightly different but still crisp and satisfying.
Blueberry Dump Cake Recipe
Ingredients
Method
- Preheat the oven to 350°F (175°C). Spread the blueberry pie filling in an even layer in an ungreased 9×13-inch baking dish.
- Sprinkle the dry cake mix evenly over the fruit; do not stir.
- Drizzle the melted butter slowly over the top, trying to cover all the mix. Scatter nuts on top if using.
- Bake for 45 to 50 minutes, until the top is golden and the fruit bubbling. Cool 10 to 15 minutes.
- Scoop into bowls and serve warm, with vanilla ice cream.
