Easy 2-Ingredient Pumpkin Dump Cake: Best Spice Cake Mix Recipe

I had been hearing about this “magic” pumpkin dump cake for years. Honestly, I thought it sounded like a gimmick. Two ingredients? A box of cake mix and a can of pumpkin? There was no way that was actually going to produce anything worth eating, let alone something I would serve to guests. I mean, I’ve spent years learning techniques, creaming butter and sugar just right, and meticulously measuring spices. The idea of tossing a box mix and canned pumpkin into a pan felt almost disrespectful to baking. So, I ignored it. I scrolled right past the pins, the posts, the recipe videos. I had my standards, you know?

Then, last October, the day before a neighborhood potluck, my entire afternoon fell apart. The toddler refused to nap, the grocery delivery was missing half my order, and I had exactly zero energy left to make my usual apple crisp. In a moment of pure desperation—and I mean pure, white-flag desperation—I remembered that silly dump cake. I had a can of pumpkin puree in the pantry and a box of spice cake mix left over from a baking project I never got to. “Fine,” I muttered to the spice cabinet, “You win.”

I dumped the pumpkin into a pan, sprinkled the dry cake mix on top, and slid it into the oven. I didn’t even stir it. I felt a little embarrassed, honestly. But twenty minutes later, my kitchen smelled like a harvest festival wrapped in a hug. And when I finally took a bite—standing over the counter, still in my messy apron—I had to sit down. It was absurdly, ridiculously good. The top was a perfect, crackly crumb, and the bottom was this dense, fudgy, pumpkin-spiced custard. It was like a pudding cake and a crumble had a baby. Maybe you’ve been there—that moment when the easiest, laziest thing you’ve ever made turns out to be the best thing you’ve made all month. That was this cake. And I’ve been making it ever since, not out of desperation anymore, but because it genuinely deserves a spot on the table.

Why You’ll Love This Recipe

Let me be clear: this isn’t a “good for how easy it is” kind of recipe. This is a “I would serve this on Thanksgiving without a second thought” kind of recipe. I’ve tested it with different brands of cake mix, different pan sizes, and even different pumpkin purees. It works every single time. Here is why this version has earned a permanent place in my recipe box:

• Two Ingredients: That’s it. Canned pumpkin puree and a box of spice cake mix. No eggs, no butter, no oil, no milk. It feels like a magic trick.
• One Bowl, No Mixer: You don’t even need to dirty a bowl. You can mix it right in the baking dish. The clean-up is almost non-existent.
• Perfect for Fall Gatherings: This cake screams autumn. It’s the ideal dessert for Thanksgiving, Friendsgiving, Halloween parties, or a cozy Sunday night.
• Crowd-Pleasing Texture: The top gets crispy and crumbly, while the bottom turns into a rich, pumpkin pie-like custard. It’s two desserts in one.
• Naturally Dairy-Free & Egg-Free: Because there are no eggs or butter, this recipe happens to be vegan as written. No one will ever guess.

What really sets this recipe apart from other dump cakes is the texture. Most dump cakes are a soggy, one-note mess. But because pumpkin puree is so thick and rich, it creates this incredible layered effect. The dry cake mix on top doesn’t fully dissolve—it bakes into a crisp, almost cookie-like topping. And the pumpkin underneath transforms into a silky, spiced custard. It’s not just easy; it’s actually brilliant. This is the kind of dessert that makes you close your eyes after the first bite. It is comfort food, reimagined. It is faster, simpler, and somehow more soul-soothing than anything you could slave over for hours. Perfect for impressing guests without the stress.

What Ingredients You Will Need

This recipe uses the simplest possible ingredients—just two pantry staples—to deliver a dessert that tastes like you spent all day in the kitchen. There is no fuss, no exotic shopping list, and no complicated prep.

• 1 can (15 oz) pure pumpkin puree – Make sure you are buying pure pumpkin puree, not pumpkin pie filling. Pumpkin pie filling has added sugar and spices, which will throw off the texture and sweetness. I personally prefer Libby’s brand for its consistent thickness and smooth texture. If you use a different brand, just make sure it’s 100% pure pumpkin.
• 1 box (15.25 oz) spice cake mix – This is the magic ingredient. The spice cake mix already contains cinnamon, nutmeg, ginger, and cloves, so you don’t need to add any extra spices. I recommend Betty Crocker or Duncan Hines spice cake mix for the best flavor and crumb. If you cannot find spice cake mix, you can use a yellow cake mix and add 2 teaspoons of pumpkin pie spice to the dry mix.
• Optional: 1/2 cup chopped pecans or walnuts – This is not required for the “two-ingredient” version, but I love adding a handful of nuts on top for extra crunch. It makes the cake look a little more dressed up for company.
• Optional: 1/4 cup caramel sauce or maple syrup for drizzling – Again, not necessary, but a drizzle of caramel or maple syrup right before serving takes this cake over the top. It adds a beautiful finish and a little extra sweetness.

Ingredient Substitution Guidance: If you are gluten-free, you can use a gluten-free spice cake mix. I have tested this with King Arthur Measure for Measure Gluten-Free Spice Cake Mix, and it works beautifully. The texture is slightly more delicate, but the flavor is spot on. If you are watching your sugar intake, you can use a sugar-free spice cake mix, though the texture may be a bit less crisp on top. For the pumpkin, there really is no substitute—canned pumpkin puree is the star here and provides the necessary moisture and structure.

Equipment Needed

One of the best things about this recipe is how little equipment you need. You likely already have everything in your kitchen.

• 9×13-inch baking dish – A standard glass or ceramic baking dish works perfectly. I use a Pyrex 9×13 dish, and it gives the cake even baking and easy cleanup. If you use a metal pan, keep an eye on the baking time—metal conducts heat faster, so the cake may be done a few minutes earlier.
• Rubber spatula or wooden spoon – For spreading the pumpkin puree evenly in the pan. A rubber spatula makes it easier to get into the corners.
• Measuring cups and spoons (if adding optional ingredients) – For measuring nuts or any other add-ins.
• Cooling rack – Optional, but letting the cake cool on a wire rack prevents the bottom from getting soggy.
• Sharp knife or bench scraper – For cutting clean slices. A dull knife will drag through the crumbly topping and make a mess.

If you don’t have a 9×13 dish, you can use two 8×8 square dishes or even a 10-inch cast iron skillet. Just adjust the baking time slightly, as smaller pans will bake faster. I once made this in a disposable aluminum pan for a camping trip, and it worked perfectly—no fancy equipment required!

Preparation Method

This is the easiest dessert you will ever make. There are no complicated steps, no mixer required, and no messy bowls. Just follow these simple instructions, and you will have a show-stopping dessert in under an hour.

1. Preheat your oven to 350°F (175°C). Position the rack in the center of the oven. While the oven is heating, take your can of pumpkin puree and your box of spice cake mix out of the pantry so they can come to room temperature slightly—this helps them mix more evenly.
2. Prepare your baking dish. Lightly grease a 9×13-inch baking dish with non-stick cooking spray or a thin layer of butter. You don’t need to go overboard—just a light coating to prevent sticking. I use a paper towel to spread the spray evenly. If you are using a non-stick pan, you can skip this step, but I always do it anyway for peace of mind.
3. Add the pumpkin puree. Empty the entire 15-ounce can of pumpkin puree into the prepared baking dish. Use your rubber spatula to spread it into an even layer. Do not worry if it doesn’t cover the entire bottom perfectly—just get it as even as you can. The heat will do the rest.
4. Sprinkle the cake mix. Open the box of spice cake mix and sprinkle the dry powder evenly over the pumpkin puree. Do not stir it. I repeat—do not stir it. This is the “dump” part of the dump cake. The dry cake mix needs to stay on top so it can form that beautiful, crackly crust. Use your fingers or a fork to break up any large clumps of cake mix. You want an even, sandy layer covering the pumpkin.
5. Add optional toppings. If you are using chopped pecans or walnuts, sprinkle them evenly over the top of the cake mix. This is also the time to add a light dusting of cinnamon or a sprinkle of coarse sugar for extra crunch.
6. Bake for 35-40 minutes. Place the dish in the preheated oven and bake until the top is golden brown and the edges are bubbling. The cake is done when you can see the pumpkin mixture bubbling up around the edges of the pan. The top should feel firm and crisp to the touch. If you insert a toothpick into the center, it should come out with a few moist crumbs—not wet batter.
7. Cool for at least 15 minutes. Remove the cake from the oven and place it on a cooling rack. Let it cool for at least 15-20 minutes before serving. This is important—the cake needs time to set up. If you cut into it too soon, it will be too soft and runny. The texture firms up beautifully as it cools.
8. Serve warm or at room temperature. This cake is delicious warm, with a scoop of vanilla ice cream melting over the top. It is also fantastic at room temperature the next day. Use a sharp knife to cut clean squares, and lift them out with a wide spatula.

Pro Tip: If you want a slightly richer cake, you can drizzle 2 tablespoons of melted butter or coconut oil over the top of the cake mix before baking. This will give you an even crispier, more buttery crust. But honestly, it is already perfect without it.

Cooking Tips & Techniques

Over the years, I have made this cake more times than I can count. I have learned a few things the hard way, so you don’t have to. Here are my best tips for dump cake success.

Don’t overthink the “no stirring” rule. I know it feels wrong. Every baking instinct tells you to mix everything together. But trust the process. The magic of a dump cake is in the layering. The pumpkin stays dense and fudgy on the bottom, while the dry cake mix absorbs just enough moisture from the pumpkin to form a crispy, crumbly topping. If you stir it, you will end up with a uniform, pasty texture—and that is not what we are going for.

Watch your baking time. Ovens vary wildly. I once burned the top of my dump cake because I got distracted and left it in for an extra five minutes. Start checking at the 30-minute mark. The top should be deep golden brown, and you should see the pumpkin bubbling around the edges. If the top is browning too quickly, tent the pan loosely with aluminum foil for the last 10 minutes of baking.

Let it cool, I mean it. I made the mistake of cutting into a piping hot dump cake once, and it was a soupy mess. The cake needs time to rest and set up. The pumpkin custard continues to thicken as it cools. If you can wait a full 30 minutes, you will be rewarded with clean, perfect squares.

Use a sharp knife for slicing. This is a small thing, but it makes a big difference. A dull knife will drag through the crumbly topping and squish the custard layer. A sharp chef’s knife or a bench scraper will give you clean, beautiful slices. Wipe the knife clean between cuts for the best presentation.

Double the recipe for a crowd. This recipe is incredibly easy to scale. For a larger group, double the ingredients and bake in a 13×18-inch half-sheet pan. Increase the baking time by about 10 minutes, and keep an eye on it. I have done this for potlucks, and it disappears every single time.

Variations & Adaptations

This recipe is a blank canvas. Once you master the basic two-ingredient version, you can play around with endless variations. Here are a few of my favorites:

• Chocolate Pumpkin Dump Cake: Swap the spice cake mix for a chocolate cake mix. The combination of chocolate and pumpkin is surprisingly amazing. The chocolate flavor is rich and deep, and the pumpkin keeps the cake incredibly moist. Top with chocolate chips before baking for extra decadence.
• Apple Pumpkin Dump Cake: Add one can of apple pie filling (21 oz) to the bottom of the pan before adding the pumpkin puree. Spread the apple filling in an even layer, then top with the pumpkin, then the cake mix. This gives you a beautiful apple-pumpkin layered dessert that tastes like fall in a bite.
• Vegan & Dairy-Free Version: This recipe is already vegan as written, as long as you use a vegan cake mix. Most spice cake mixes are accidentally vegan, but double-check the label. If you want to add a drizzle on top, use a dairy-free caramel sauce or a simple maple glaze made with powdered sugar and plant-based milk.
• Pumpkin Dump Cake Cobbler: For a softer, more cobbler-like texture, drizzle 1/2 cup of melted butter or coconut oil over the top of the cake mix before baking. This will create a more cohesive, biscuit-like topping that soaks up the pumpkin underneath. It is a little less crispy and a little more gooey—perfect for serving with ice cream.
• Spiced-Up Version: If you want even more spice, add 1 teaspoon of pumpkin pie spice or a pinch of cardamom to the dry cake mix before sprinkling it over the pumpkin. You can also add a teaspoon of vanilla extract to the pumpkin puree for a warmer flavor profile.

I personally love the chocolate pumpkin version. I was skeptical at first, but my husband convinced me to try it, and now I make it almost as often as the original. The chocolate and pumpkin are a surprisingly perfect match—the richness of the chocolate balances the earthy sweetness of the pumpkin. Give it a try!

Serving & Storage Suggestions

This cake is incredibly versatile when it comes to serving. Here is how to make the most of it.

Serving Temperature: This cake is delicious warm, at room temperature, or even cold from the fridge. I personally love it warm, with a scoop of vanilla bean ice cream melting into the crumbly top. The contrast between the warm cake and cold ice cream is pure bliss. For a slightly fancier presentation, dust the top with powdered sugar and a pinch of cinnamon right before serving.

Complementary Dishes: This cake is rich enough to stand on its own, but it pairs beautifully with a dollop of fresh whipped cream, a drizzle of caramel sauce, or a spoonful of Greek yogurt for a tangy contrast. If you are serving it for a holiday meal, it goes wonderfully alongside a cup of hot apple cider or a spiced chai latte.

Storage Instructions: Store any leftovers in an airtight container in the refrigerator for up to 5 days. The cake actually gets better after a day in the fridge—the flavors meld together, and the texture becomes even more fudgy and dense. I often make this cake a day ahead of time for gatherings, and it is always a hit.

Reheating Tips: To reheat, place a slice on a microwave-safe plate and microwave for 15-20 seconds. This will bring back the warm, gooey texture without drying it out. You can also reheat individual slices in a 350°F oven for 5-7 minutes if you prefer a crisper top. Do not overheat, or the pumpkin layer can become watery.

Freezer Instructions: This cake freezes beautifully. Let it cool completely, then wrap the entire pan tightly in plastic wrap, followed by a layer of aluminum foil. Freeze for up to 3 months. To thaw, let it sit in the refrigerator overnight, then reheat as directed. You can also freeze individual slices for quick desserts. I always keep a few slices in my freezer for those days when I need a little comfort.

Nutritional Information & Benefits

While this is definitely a treat, it does have a few surprising nutritional perks. Here is an approximate breakdown per serving (based on 12 servings):

• Calories: ~210
• Total Fat: 2g
• Carbohydrates: 45g
• Fiber: 3g
• Sugar: 28g
• Protein: 3g

Health Benefits of Key Ingredients: Pumpkin puree is packed with vitamin A, which is great for eye health and immune function. It is also high in fiber, which helps with digestion and keeps you feeling full. Cinnamon and other spices in the cake mix have anti-inflammatory properties and can help regulate blood sugar. While this is not a health food, it is a dessert that happens to have a few redeeming qualities—and that makes me feel a little better about going back for seconds.

Dietary Considerations: This recipe is naturally dairy-free, egg-free, and vegan (check your cake mix label). It can be made gluten-free by using a gluten-free spice cake mix. It is not low-carb or keto-friendly due to the cake mix, but there are keto spice cake mixes available if you want to experiment.

I love that this dessert feels indulgent but is made with real, simple ingredients. There is no artificial anything—just pumpkin and a box of spice cake. It is comfort food that I can feel good about serving my family.

Conclusion

If you take nothing else away from this post, let it be this: you do not need to spend hours in the kitchen to create a dessert that tastes like a warm hug. This easy two-ingredient spice cake mix pumpkin dump cake is proof that sometimes the simplest things are the most satisfying. It is forgiving, adaptable, and absolutely delicious. Whether you are making it for a holiday feast, a weeknight treat, or just because you have a can of pumpkin and a box of cake mix staring at you from the pantry, this recipe will not let you down.

I encourage you to make this your own. Add nuts, swap the cake mix, drizzle it with caramel—whatever feels right to you. That is the beauty of a dump cake. It is never fussy, and it always delivers. I would love to hear how yours turns out. Did you try a variation? Did you serve it with something unexpected? Drop a comment below and let me know. Your feedback helps other readers, and honestly, I just love hearing about your kitchen victories. Happy baking, friend. You have got this.

Frequently Asked Questions

Can I use pumpkin pie filling instead of pumpkin puree?

I do not recommend it. Pumpkin pie filling already has sugar and spices added, which will make the cake overly sweet and throw off the texture. Stick with 100% pure pumpkin puree for the best results. The spice cake mix already has all the flavor you need.

Do I need to add eggs or oil to this recipe?

No! That is the magic of this recipe. The pumpkin puree provides enough moisture and structure that you do not need any eggs, oil, or butter. The dry cake mix absorbs moisture from the pumpkin as it bakes, creating a perfectly textured dessert without any extra fat or binder.

Why is my dump cake soggy in the middle?

If your dump cake is soggy, it likely needs more baking time. Make sure you are baking it until the edges are bubbling and the top is deep golden brown. Also, let the cake cool for at least 15-20 minutes before cutting into it. The cake continues to set as it cools, and cutting too early can release steam and make the texture mushy.

Can I make this in a slow cooker or Instant Pot?

Yes, you can make a version of this in a slow cooker. Spray the slow cooker insert with non-stick spray, add the pumpkin puree, and top with the cake mix. Cook on low for 2-3 hours or on high for 1-2 hours, until the top is set and the edges are bubbling. The texture will be softer and more pudding-like than the oven version. I do not recommend the Instant Pot for this recipe, as it requires dry heat to create the crispy topping.

How do I store leftovers and how long do they last?

Store leftovers in an airtight container in the refrigerator for up to 5 days. The cake actually tastes even better the next day as the flavors meld together. You can also freeze the cake for up to 3 months. Wrap it tightly in plastic wrap and foil, then thaw in the refrigerator overnight before reheating.

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