There is something about the smell of pumpkin and warm spices drifting out of the oven that makes a kitchen feel instantly like fall, and this dump cake delivers that feeling with almost no effort. Underneath a golden, slightly crisp top, you get a soft, custardy layer of spiced pumpkin that tastes like the best part of a pumpkin pie, while the crumbly cake topping brings in that buttery, cinnamon sugar richness you want in every bite. Toasted pecans scattered over the top add a little crunch and a nutty aroma that makes the whole thing smell like a bakery the second it comes out of the oven.
This is the dessert you reach for when you need something impressive but do not have hours to spend fussing over a fancy layer cake. It is perfect for potlucks, church suppers, Thanksgiving dinner, or any time you are feeding a crowd and want a pan that serves a lot of people without a lot of stress. Because it uses a boxed cake mix as the topping, it comes together in minutes, and it bakes low and slow so you can prep other dishes while it does its thing in the oven.
SaveI first made this the week before Thanksgiving when my oven schedule was already packed and I needed a make ahead dessert that would not compete for oven space with the turkey. It baked while I tackled side dishes, and by the time everyone sat down to eat, the whole house smelled like a pumpkin patch. It disappeared faster than the pie did, and now it has a permanent spot on our holiday table, plus it makes an appearance at more than one fall potluck every single year.
Easy Pumpkin Dump Cake for a Crowd
Ingredients
Pumpkin Custard Layer
Cake Topping
Finishing Touches
Instructions
- Preheat the oven and prep your pan
Preheat your oven to 350 degrees Fahrenheit. Lightly grease a 9x13 inch baking dish with butter or nonstick spray, making sure to coat the corners well so the custard layer does not stick as it bakes and sets.
- Whisk together the pumpkin custard base
In a large mixing bowl, whisk the pumpkin puree, evaporated milk, and eggs together until completely smooth with no streaks of egg visible. The mixture should look uniform and slightly lighter in color once fully combined.
- Add the sugar and spices
Whisk the granulated sugar, cinnamon, ginger, nutmeg, cloves, and salt into the pumpkin mixture. Continue whisking for about a minute until the sugar has mostly dissolved and the batter smells fragrant and warmly spiced.
- Pour the custard into the prepared pan
Pour the pumpkin custard mixture evenly into your greased baking dish, using a spatula to scrape the bowl clean. Gently tilt the pan side to side so the custard settles into an even, level layer across the bottom.
- Sprinkle the dry cake mix over the custard
Open the box of cake mix and sprinkle it evenly over the entire surface of the pumpkin custard. Use a spoon to break up any large clumps and spread it into a thin, even layer that reaches all the way to the edges of the pan. Do not stir it into the custard, it needs to stay on top to form the crust.
- Drizzle melted butter over the cake mix
Slowly drizzle the melted butter over the dry cake mix in a slow, even zigzag pattern, working your way across the entire pan so every part of the topping gets some moisture. Some dry spots may remain, and that is completely normal for a dump cake.
- Scatter the pecans on top
Sprinkle the chopped pecans evenly over the buttered cake mix layer. Press them down very gently with the back of a spoon so they stay in place and toast nicely instead of scattering off the top during baking.
- Add a light cinnamon sugar dusting
Sprinkle the cinnamon sugar mixture lightly over the top of the pecans. This step is optional, but it adds a little extra sparkle and a slightly crisp, caramelized edge once the cake bakes.
- Bake until the top is golden and set
Bake the cake uncovered for 50 to 60 minutes, until the topping is golden brown and slightly crisp, and the custard layer no longer jiggles in the center when you gently shake the pan. If the top browns too quickly, tent it loosely with foil for the last 10 minutes.
- Cool before slicing
Remove the pan from the oven and let it cool on a wire rack for at least 30 minutes before serving. The custard layer needs this time to firm up slightly so your slices hold together instead of falling apart.
- Slice and serve warm or at room temperature
Cut the dump cake into squares using a sharp knife, wiping the blade clean between cuts for the neatest edges. Serve warm with a scoop of vanilla ice cream or a dollop of whipped cream on top.
Substitutions and variations
- If you prefer a deeper spice flavor, swap the yellow cake mix for a spice cake mix and reduce the added cinnamon in the custard layer by half a teaspoon.
- Walnuts work just as well as pecans if that is what you have on hand, or you can leave the nuts out entirely for a nut free version.
- Evaporated milk can be replaced with an equal amount of heavy cream if you want an even richer, silkier custard layer.
- For a dairy free option, use melted coconut oil in place of the butter and a canned coconut milk in place of the evaporated milk.
- You can use fresh roasted and pureed pumpkin instead of canned, just make sure it is well drained so the custard layer sets properly.
Chloe's tips
- Make sure the dry cake mix layer fully covers the custard, any gaps can cause uneven baking or soggy patches once the cake cools.
- Toast the pecans in a dry skillet for a few minutes before scattering them on top for an even deeper, nuttier flavor.
- Use a glass or light colored metal baking dish so you can watch the bottom layer set without the edges over browning.
- Let the cake rest for a full 30 minutes before cutting, it slices much more cleanly once the custard has had time to firm up.
How to store it
- Store leftovers covered tightly in the refrigerator for up to 5 days, since the custard layer needs to stay chilled once cooled.
- Reheat individual portions in the microwave for 20 to 30 seconds to bring back that warm, fresh from the oven texture.
- This cake can be frozen for up to 2 months, wrap slices individually in plastic wrap and foil, then thaw overnight in the refrigerator before reheating.
- Avoid leaving the cake at room temperature for more than 2 hours because of the egg and dairy in the custard layer.
Serving suggestions
This pumpkin dump cake is rich enough to stand on its own, but a few simple additions can make it feel even more special for a crowd.
- Top each slice with a generous scoop of vanilla bean ice cream while the cake is still warm.
- Add a swirl of fresh whipped cream and a light dusting of cinnamon for a pretty finishing touch.
- Drizzle warm caramel sauce over the top for an extra layer of sweetness at holiday gatherings.
- Serve alongside spiced apple cider or coffee to round out a cozy fall dessert table.
Frequently asked questions
Can I make this pumpkin dump cake ahead of time?
Yes, you can bake it up to 2 days in advance, cool it completely, then cover and refrigerate. Warm individual portions in the microwave or bring the whole pan to room temperature before serving.
Why is my dump cake still doughy in the middle?
This usually means the custard layer needed more time to set or the cake mix layer was too thick in the center. Bake in 5 minute increments until the center no longer jiggles, and next time try spreading the dry cake mix a little thinner.
Can I use fresh pumpkin instead of canned pumpkin puree?
Absolutely, just make sure your roasted and pureed pumpkin is thick and well drained. Watery pumpkin puree can prevent the custard layer from setting properly, so straining it through a fine mesh sieve first is a good idea.
Is this recipe good for a large gathering or potluck?
Yes, this recipe is designed to feed a crowd, with about 20 servings from a single 9x13 inch pan. It travels well once cooled and can be served straight from the baking dish, which makes cleanup easy too.
Can I double this recipe for an even bigger crowd?
You can double the ingredients and bake it in two separate 9x13 inch pans, or use a large half sheet pan with slightly reduced bake time. Baking in one oversized pan is not recommended because the custard layer may not set evenly.
Let's get cooking!
This easy pumpkin dump cake for a crowd is proof that a truly comforting fall dessert does not have to be complicated. With its silky spiced pumpkin layer, buttery golden topping, and toasted pecan crunch, it brings all the cozy flavors of the season to the table without demanding hours of your time. Whether you are baking it for a holiday gathering, a potluck, or just because the weather turned cool, this is the kind of dessert that gets requested again and again, so go ahead and make a pan, you will want the leftovers too.
