When you want dessert without a lot of dishes or fuss, a dump cake hits the sweet spot. It’s part cobbler, part cake, and entirely weeknight-friendly. The payoff is big: warm, bubbly fruit tucked under a crisp, buttery topping you can spoon straight from the pan. The method is so simple that once you learn the basic formula, you can turn almost any fruit in your pantry or freezer into a cozy dessert that feels special with almost no planning.
What Exactly Is a Dump Cake?
A dump cake is a fruit-forward bake made by layering fruit (pie filling or lightly sweetened fresh/frozen fruit), dry cake mix, and melted or sliced butter in a baking dish. You don’t whisk a batter. You don’t cream butter and sugar. You simply “dump,” layer, and bake until the top is browned and the fruit is bubbling. Think of it as a faster, looser cousin of a crisp, with a crackly cake-like crust.
The Core Formula (Memorize This)
- Pan: 9×13-inch baking dish (metal browns best; glass runs slightly slower).
- Fruit layer: About 5–6 cups fruit.
- Canned pie filling: 2 large (20–21 oz) cans.
- Fresh or frozen fruit: 6 cups, tossed with ½–¾ cup sugar and 1–2 Tbsp cornstarch (more on that below).
- Dry mix: 1 standard 15.25-oz box cake mix (yellow, white, spice, chocolate—your call).
- Butter: 10–12 Tbsp (5–6 oz). Melted and drizzled or very thinly sliced.
Bake at 350°F until the top is deeply golden and the fruit is thick and bubbling around the edges, 45–55 minutes (closer to 40–45 in metal, 50–60 in glass). Rest 10–15 minutes so the juices settle, then serve warm.
Step-by-Step, No Fuss
- Prep the pan. Lightly butter or spray the dish so the corners release cleanly.
- Add fruit. Spread the fruit evenly. If you’re using fresh or frozen fruit, toss it first with sugar and cornstarch (see ratios below).
- Sprinkle the cake mix. Distribute the dry mix evenly; don’t stir it in.
- Top with butter. Drizzle melted butter evenly or shingle paper-thin slices across the surface so most of the mix is moistened.
- Bake. You’re looking for a toasty, uniform brown with vigorous bubbling at the edges.
- Rest and serve. Give it a short rest. Spoon into bowls. Add vanilla ice cream, lightly sweetened whipped cream, or a dollop of yogurt.
Fresh, Frozen, or Canned? Use What You Have
- Canned pie filling is the speediest route. Two large cans will cover a 9×13. If it’s very sweet, balance with a squeeze of lemon and a pinch of salt.
- Frozen fruit is great for shoulder seasons. Don’t thaw; toss with ½–¾ cup sugar (to taste), 1½ Tbsp cornstarch per 6 cups fruit, 1 tsp lemon juice, and a pinch of salt.
- Fresh fruit shines in peak season. For juicy fruits (peaches, berries): the same sugar/cornstarch ratio as frozen. For apples and pears: use ⅔ cup sugar and 2 Tbsp cornstarch, plus 1 tsp cinnamon if you like.
Simple Thickener Guide
- Most berries, cherries, peaches: 1½ Tbsp cornstarch per 6 cups fruit.
- Very juicy or mixed frozen fruit: 2 Tbsp cornstarch.
- Apples/pears: 2 Tbsp cornstarch.
Cake Mix Choices (and What They Do)
- Yellow/white mix: Classic, buttery flavor with a tender crunch on top.
- Spice mix: Pairs well with apples, pears, pumpkin, and figs.
- Chocolate mix: Loves cherries, raspberries, and blackberries.
- Lemon mix: Bright with blueberries or mixed berries.
If your mix is the older 18.25-oz size, use about ¾ of the bag or add an extra tablespoon or two of butter to ensure even browning.
Butter: Melted vs. Sliced
- Melted butter drizzles into crevices and moistens the mix more evenly.
- Thin slices create a craggier, extra-crisp top (great when you want more texture).
- Coverage matters. Dry patches usually mean pale, floury spots. If you see a dry patch at the 30-minute mark, spoon on a tablespoon or two of melted butter and continue baking.
Pan Sizes and Small Batches
- 8×8 or 9×9 pan: Halve all ingredients. Bake 35–45 minutes.
- Sheet pan (10×15 jelly roll): Spread 1½ recipes of fruit and mix for more crisp area; bake 35–45 minutes.
- Individual ramekins: Spoon in fruit, sprinkle mix, drizzle butter. Bake 22–28 minutes.
Seasonal Variations You’ll Actually Make
- Blueberry–Lemon: 6 cups blueberries + lemon cake mix + zest of 1 lemon under the mix.
- Apple–Spice: 6 cups sliced apples + ⅔ cup sugar + 2 Tbsp cornstarch + spice cake mix.
- Peach–Vanilla: Canned or fresh peaches + yellow mix + 1 tsp vanilla in the fruit.
- Cherry–Chocolate: Cherry pie filling + chocolate mix; add ¼ cup mini chips under the mix if you want it richer.
- Pumpkin–Pecan: 1 (30-oz) can pumpkin pie filling (or 2×15-oz), spice mix, and ½ cup chopped pecans over the top before butter.
- Pineapple–Coconut: Crushed pineapple in juice (undrained), yellow mix, ½ cup unsweetened coconut flakes sprinkled before the butter.
Smart Add-Ins That Don’t Overcomplicate
- Crunch: ½ cup chopped pecans, walnuts, or sliced almonds.
- Warmth: 1 tsp cinnamon or pumpkin pie spice mixed with the dry cake mix.
- Citrus: Zest of 1 lemon or orange stirred into the fruit.
- Chocolate: ¼–½ cup mini chips over the fruit layer.
- Toasted coconut: Sprinkle in the last 10 minutes so it doesn’t burn.
Doneness Cues You Can Trust
- Color: Deep golden to light brown across most of the surface. Pale equals underdone.
- Bubbling: Steady, syrupy bubbles at the edges tell you the fruit has thickened.
- Texture: The top should feel crisp when tapped with a spoon, not sandy or raw.
If the top browns too fast, tent loosely with foil for the last 10–15 minutes.
Make-Ahead, Storing, and Reheating
- Make-ahead: Assemble up to 4 hours in advance and refrigerate. If using fresh fruit, sprinkle an extra teaspoon of cornstarch over the fruit to offset any juices that release.
- Fridge: Cover and refrigerate up to 4 days.
- Freeze: Cool completely; wrap well; freeze up to 2 months. Thaw in the fridge, then warm at 325°F until heated through.
- Reheat: 300–325°F for 12–18 minutes (pan) or microwave 30–60 seconds (single serving). Add a splash of water or lemon to perk up the fruit if needed.
Serving Ideas That Keep It Easy
- Classic: Vanilla ice cream or lightly sweetened whipped cream.
- Lighter: Greek yogurt with a drizzle of honey.
- Crunch: Crushed graham crackers or shortbread scattered just before serving.
- Fresh finish: A handful of fresh berries or a few thin peach slices on top.
Dietary Tweaks
- Gluten-free: Use a gluten-free yellow or vanilla cake mix; check labels on pie fillings.
- Dairy-free: Use a dairy-free butter substitute with a high fat percentage; avoid tub spreads with lots of water.
- Lower sugar: Start with unsweetened fruit and reduce added sugar in the fruit layer; balance with lemon and a pinch of salt to keep flavors bright.
Troubleshooting Guide
- Dry floury spots on top: Not enough butter contact. Spoon on 1–2 Tbsp melted butter and bake 5–10 more minutes.
- Soupy fruit layer: Insufficient thickener or not baked long enough. Bake until the edges bubble steadily; next time, add ½–1 Tbsp more cornstarch.
- Burning edges, pale center: Hot oven walls or glass pan. Rotate the pan at the 25-minute mark and continue baking.
- Too sweet: Add lemon juice and a pinch of salt to the fruit before baking; serve with tangy yogurt.
A Reliable Base Recipe (Adaptable)
- Fruit: 6 cups blueberries (or 2 cans pie filling)
- Sugar & thickener (skip if using pie filling): ½–¾ cup sugar + 1½ Tbsp cornstarch + 1 tsp lemon juice + pinch of salt
- Dry mix: 1 box lemon or yellow cake mix
- Butter: 10–12 Tbsp, melted
Heat oven to 350°F. Butter a 9×13 pan. Toss fruit with sugar, cornstarch, lemon, and salt; spread in pan. Sprinkle cake mix in an even layer. Drizzle melted butter over the entire surface, aiming for full coverage. Bake 45–55 minutes until browned and bubbling. Rest 10–15 minutes. Serve warm.
Dump cakes reward the home cook who keeps a few smart staples on hand. With a box of cake mix, some butter, and fruit from the pantry, freezer, or fruit bowl, you can put a crowd-pleasing dessert on the table with time to spare. It’s the kind of weekend baking that doesn’t take over your weekend—simple steps, dependable results, and plenty of room to make it your own.
