Easy Reeses Peanut Butter Pumpkin Dump Cake (Best Fall Dessert)

My neighbor Karen handed me a foil pan covered in aluminum foil last October and said, “Here, you need this.” I did not need a pumpkin dump cake. In fact, I had a whole list of reasons why I didn’t want one. Dump cakes felt lazy to me (like, you just dump stuff in a pan and call it baking?), and pumpkin desserts can be a letdown when they taste more like spice dust than actual squash. Plus, she mentioned peanut butter, and I thought—that’s a weird combo. Pumpkin and peanut butter? I wasn’t convinced.

I took the pan home out of politeness. It sat on my counter for a few hours while I made dinner. Around 8 PM, I cut a small square. Just to be nice. The first bite was warm and soft, with a layer of gooey peanut butter melting into sweet pumpkin underneath a crumbly, buttery top. Honestly, I stood at the counter and ate that square standing up. Then I cut another one. Then I texted Karen for the recipe before I finished the second piece.

That pan lasted about 36 hours in my house. I made my own version the next weekend, and it disappeared just as fast. This Easy Reese’s Peanut Butter Pumpkin Dump Cake has become my go-to fall dessert for everything from Sunday dinners to random Tuesday cravings. It tastes like someone took a pumpkin pie and a peanut butter cookie and decided to become best friends. You don’t need a mixer, you don’t need patience, and you definitely don’t need to be a good baker. You just need a pan and a craving for something ridiculously good.

Why You’ll Love This Recipe

I’ve made this dump cake at least a dozen times now, and every single time someone asks for the recipe. That’s not me bragging—that’s just what happens when peanut butter and pumpkin get together in a pan with butter and cake mix. It’s the kind of dessert that makes people close their eyes while chewing.

• Comes together in under 10 minutes. No creaming butter, no sifting flour, no chilling dough. You literally layer ingredients in a pan and bake. That’s it.
• Pantry-friendly ingredients. Canned pumpkin, boxed cake mix, peanut butter cups, and butter. You probably have most of this stuff already, especially if you stock up on fall baking supplies.
• Perfect for fall gatherings. Thanksgiving potlucks, Friendsgiving dinners, Halloween parties, or just a cozy night in with a movie. This dessert fits every autumn occasion.
• Kids and adults fight over it. I brought this to a family dinner and watched my uncle (who “doesn’t do pumpkin”) go back for thirds. The peanut butter wins over the skeptics every time.
• Zero special skills required. If you can open a can and sprinkle dry mix over a pan, you can make this. It’s practically foolproof.

What makes this version different from other pumpkin dump cakes is the Reese’s peanut butter cups. Most recipes just use peanut butter chips or skip the peanut butter entirely. I mince up those little orange-and-brown wrapped candies and scatter them through the middle and on top. They melt into pockets of chocolate-peanut butter goodness that pair perfectly with the spiced pumpkin layer underneath. It’s not just another dump cake—it’s the one you’ll keep coming back to all season long.

What Ingredients You Will Need

This recipe uses simple, honest ingredients that work together to create something way more delicious than the sum of its parts. Most of these are fall pantry staples, and the ones that aren’t are easy to find at any grocery store.

• 1 can (15 oz) pumpkin puree — Not pumpkin pie filling. Make sure you grab 100% pure pumpkin. I prefer Libby’s for its consistent texture and deep color, but store brands work fine too.
• 1 can (12 oz) evaporated milk — This adds richness without making the filling too heavy. Regular milk won’t give you the same creamy texture, so stick with evaporated if you can.
• 3/4 cup granulated sugar — Just enough sweetness to balance the earthy pumpkin and salty peanut butter.
• 2 large eggs — Room temperature is best, but cold eggs work in a pinch. They help bind the pumpkin layer together.
• 2 teaspoons pumpkin pie spice — You can use store-bought or make your own with cinnamon, nutmeg, ginger, and cloves. I’ve done both and honestly, the store stuff is totally fine.
• 1 teaspoon vanilla extract — Pure vanilla adds warmth and rounds out the spices. Imitation works if that’s what you have.
• 1 box (15.25 oz) yellow cake mix — Duncan Hines or Betty Crocker both work great. The dry mix gets sprinkled over the pumpkin layer and bakes into a crumbly, buttery topping.
• 1/2 cup unsalted butter, melted — Drizzle this over the dry cake mix. It soaks through as it bakes and creates that signature dump cake crust. If you only have salted butter, just reduce the salt elsewhere.
• 10.5 oz Reese’s peanut butter cups, roughly chopped — This is about 12-15 mini cups or 4-5 full-size cups. I like to leave some chunks bigger for melty pockets and let the smaller pieces distribute evenly. You can also use peanut butter chips in a pinch.
• Optional: chopped pecans or walnuts — A handful adds crunch if you’re into that. I skip them half the time because the peanut butter cups already bring texture.

For substitutions, you can use a gluten-free yellow cake mix if needed, or swap the evaporated milk for oat milk mixed with a tablespoon of melted coconut oil (though the texture will be slightly less rich). If you’re dairy-free, use melted vegan butter or coconut oil on top.

Equipment Needed

You don’t need fancy kitchen gear for this dump cake. That’s the beauty of it.

• 9×13-inch baking pan — Glass, ceramic, or metal all work. I use a glass Pyrex dish because I like seeing the layers as they bake. If you use metal, keep an eye on bake time—it might cook a few minutes faster.
• Large mixing bowl and whisk — For combining the pumpkin filling. Nothing electric required.
• Rubber spatula — Helps scrape every bit of the pumpkin mixture into the pan. Trust me, you want every drop.
• Chef’s knife and cutting board — For chopping the peanut butter cups. A serrated knife actually works best here since the chocolate can be stubborn.
• Measuring cups and spoons — Standard set for the sugar, spice, and vanilla.
• Small microwave-safe bowl — For melting the butter. You can also melt it on the stovetop if you prefer.

No stand mixer, no hand mixer, no sifter, no pastry cutter. This is a one-bowl, one-pan situation that takes less time to prep than preheating the oven. If you’ve got a pan and a spoon, you’re ready.

Preparation Method

Preheat your oven to 350°F (175°C). Grease your 9×13 pan lightly with butter or nonstick spray—just enough so nothing sticks, but don’t go overboard.

1. Make the pumpkin layer. In a large bowl, whisk together the pumpkin puree, evaporated milk, sugar, eggs, pumpkin pie spice, and vanilla extract. Whisk until smooth and fully combined. The mixture should look like a thick, creamy pumpkin custard. If you see any streaks of egg, keep whisking until it’s uniform. Pour this into your prepared pan and spread it evenly with your spatula.
2. Sprinkle the dry cake mix. Open the box of yellow cake mix and sprinkle the dry powder evenly over the pumpkin layer. Don’t stir it in. Don’t mix it. Just let it sit on top like a snowy blanket. Some people sift it, but I’ve never found that necessary. Just break up any clumps with your fingers as you go.
3. Add the peanut butter cups. Scatter your chopped Reese’s cups over the dry cake mix. Try to distribute them somewhat evenly so every scoop gets a few pockets of melty chocolate-peanut butter goodness. If you’re adding nuts, sprinkle them on now too.
4. Drizzle with melted butter. Pour the melted butter evenly over the entire surface. Do your best to cover as much of the cake mix as possible—the butter is what turns that dry powder into a golden, buttery crust. If you miss a spot, it’ll just stay dry and powdery, so be thorough. I like to drizzle in a zigzag pattern and then tilt the pan slightly to help it spread.
5. Bake. Place the pan in the preheated oven and bake for 40-45 minutes. The top should be golden brown and slightly cracked. The edges will be bubbly and the center should be set but still slightly jiggly—like pumpkin pie. If you insert a toothpick into the center, it should come out with moist crumbs, not wet batter.
6. Cool slightly before serving. Let the dump cake rest on a wire rack for at least 15-20 minutes. This is important—the filling needs time to set up. If you cut into it too soon, it’ll be soupy. I know it’s hard to wait, but trust me on this one.

A few notes from my kitchen: Every oven runs a little different. Mine tends to run hot, so I start checking at 38 minutes. If the top is browning too fast but the center isn’t set, tent a piece of foil loosely over the top for the last 10 minutes. And if you’re using a metal pan, start checking at 35 minutes since metal conducts heat faster than glass.

Cooking Tips & Techniques

I’ve messed up this dump cake more times than I’d like to admit. Here’s what I learned so you don’t have to learn the hard way.

Don’t overmix the pumpkin layer. I know I said to whisk until smooth, but once it’s combined, stop. Overmixing can incorporate too much air, which makes the filling puff up and then collapse. You want it dense and creamy, not airy.

Spread the cake mix evenly. The first time I made this, I dumped the whole box in one spot and tried to spread it around. Bad idea. It clumped up and left bald spots. Now I sprinkle it slowly from one end of the pan to the other, like I’m seasoning a steak. Even coverage means every bite gets that buttery crumb topping.

Melt your butter slowly. Microwave it in 20-second bursts, stirring between each. If you blast it for a full minute, you’ll end up with splattered butter and a mess. Low and slow is the way.

Let it rest. I cannot stress this enough. The first time I made this for guests, I cut into it after 10 minutes and watched the filling run across the plate like soup. Embarrassing and disappointing. Give it at least 20 minutes. The texture transforms from liquid to silky custard during that rest time.

Use room temperature eggs. Cold eggs can seize up the pumpkin mixture and make it harder to whisk smooth. If you forget to take them out ahead of time, place them in a bowl of warm water for 5 minutes before cracking.

Double-check your pumpkin. I once grabbed pumpkin pie filling by accident (the pre-sweetened, spiced kind) and ended up with a dessert that was way too sweet and strangely gelatinous. Read the label. You want 100% pure pumpkin puree.

Toast your nuts if using. A quick 3-4 minutes in a dry skillet brings out their oils and makes them crunchier. Raw nuts on top of a dump cake can turn soft and chewy, which isn’t terrible but isn’t ideal either.

Variations & Adaptations

One of the best things about this dump cake is how easy it is to tweak. I’ve tried several variations over the past few months, and here are my favorites.

Gluten-free version. Use a gluten-free yellow cake mix. King Arthur makes a good one that bakes up almost identical to regular mix. The texture might be slightly crumblier, but the flavor is spot on. I made this for a friend with celiac disease and she couldn’t tell the difference.

Chocolate pumpkin version. Swap the yellow cake mix for chocolate cake mix. It turns the whole dessert into a chocolate-peanut butter-pumpkin trifecta that’s dangerously good. The chocolate mutes the pumpkin spice slightly, so you might want to add an extra teaspoon of pumpkin pie spice to the filling.

White chocolate version. Skip the Reese’s cups and use white chocolate chips or chopped white chocolate bars instead. The sweet creaminess of white chocolate pairs beautifully with pumpkin. I tried this last Thanksgiving and it was a hit with people who find regular chocolate too heavy.

Lower sugar option. Use a sugar-free yellow cake mix and reduce the granulated sugar in the filling to 1/2 cup. The texture will be slightly less tender, but it still satisfies that dessert craving. I’ve made this for my dad who watches his sugar intake, and he ate half the pan.

Air fryer adaptation. If you’re cooking for a smaller crowd, divide the recipe in half and bake it in an 8×8 pan in the air fryer at 325°F for about 25-30 minutes. Check at 20 minutes since air fryers vary widely. The top gets extra crispy, which is actually pretty great.

Spice it up. Add 1/4 teaspoon of cayenne pepper or a pinch of chipotle powder to the pumpkin filling. The heat plays off the sweetness and makes the whole thing more complex. I did this on a whim one night and now it’s my secret weapon for dinner parties.

Serving & Storage Suggestions

This dump cake is best served warm, straight from the oven, with a scoop of vanilla ice cream melting into all those nooks and crannies. The contrast between the hot, gooey dessert and the cold, creamy ice cream is honestly what dreams are made of.

If you don’t do ice cream, a dollop of whipped cream or a drizzle of caramel sauce works beautifully. For a more decadent presentation, sprinkle a few extra chopped Reese’s cups on top right before serving, along with a pinch of flaky sea salt. The salt cuts through the sweetness and makes the peanut butter flavor pop.

This dessert pairs wonderfully with a hot cup of coffee or a spiced chai latte. It’s also fantastic alongside a slice of cozy pumpkin coffee cake with cinnamon pecan crumble topping for a full fall dessert spread.

Storage. Cover the pan tightly with foil or plastic wrap and store in the refrigerator for up to 5 days. The texture will firm up as it chills, but it softens again when reheated. I actually like it cold straight from the fridge, but I know I’m weird that way.

Reheating. Individual portions reheat beautifully in the microwave for about 20-30 seconds. For a whole pan, cover with foil and warm in a 300°F oven for 10-15 minutes. The topping will crisp back up nicely.

Freezing. This dump cake freezes well for up to 3 months. Let it cool completely, then wrap the pan tightly in plastic wrap, followed by a layer of foil. Thaw overnight in the refrigerator and reheat as directed above. I’ve frozen individual portions in airtight containers for quick desserts when I need a little something sweet.

The flavors actually deepen after a day or two in the fridge. The pumpkin spice melds with the peanut butter, and the whole thing becomes more cohesive. So if you can resist eating it all in one sitting, day-old dump cake is even better.

Nutritional Information & Benefits

Let’s be real—this is dessert. It’s not health food. But it does have some redeeming qualities worth mentioning.

Per serving (based on 12 servings): approximately 380 calories, 18g fat, 52g carbohydrates, 6g protein, 3g fiber, 32g sugar. These numbers will vary based on your specific ingredients and portion sizes.

Pumpkin puree is packed with vitamin A (over 200% of your daily needs per cup), fiber, and antioxidants like beta-carotene. It’s also low in calories and naturally sweet, which means we can use less sugar than some other desserts. The eggs add protein, and the peanut butter cups bring a small amount of iron and healthy fats.

If you’re looking for a lighter option, you can make the substitutions I mentioned earlier—sugar-free cake mix, reduced sugar in the filling, and dairy-free butter. The texture won’t be quite as luxurious, but it’ll still hit that fall dessert craving without derailing your goals.

For those with dietary concerns, this recipe contains gluten (unless you use a gluten-free mix), dairy (butter and evaporated milk), eggs, peanuts, and soy (in the Reese’s cups). Always check labels if you’re cooking for someone with allergies.

I like to think of this dump cake as a treat that also gives you a little vegetable serving. It’s not broccoli, but hey—pumpkin is a squash, and squash is a vegetable. That’s my story and I’m sticking to it.

Conclusion

This Easy Reese’s Peanut Butter Pumpkin Dump Cake is the kind of dessert that makes people ask, “Wait, that’s it?” when you tell them how simple it is. It’s rich, comforting, and tastes like fall in a pan without requiring any real baking skills or fancy equipment.

I love this recipe because it reminds me that good food doesn’t have to be complicated. Sometimes the best things come from just layering ingredients and letting the oven do the work. It’s forgiving, adaptable, and always a crowd-pleaser. Whether you’re bringing it to a Thanksgiving dinner, a Halloween party, or just making it for yourself on a quiet Sunday afternoon, it delivers every single time.

If you try this recipe, I’d love to hear how it turns out. Leave a comment below and let me know if you made any variations—I’m always looking for new ideas. And if you’re in the mood for more easy fall desserts, check out this decadent triple chocolate pumpkin dump cake with cream cheese swirl for another no-fuss treat. Happy baking, friends!

Frequently Asked Questions

Can I make this dump cake ahead of time?

Absolutely. You can assemble the entire dish (pumpkin layer, cake mix, peanut butter cups, and butter) up to 24 hours in advance. Just cover it and refrigerate. When you’re ready to bake, add about 5-10 minutes to the bake time since you’re starting from cold. You can also bake it fully and reheat as needed.

Can I use pumpkin pie filling instead of pumpkin puree?

I don’t recommend it. Pumpkin pie filling is already sweetened and spiced, plus it contains thickeners like cornstarch. Using it will throw off the sugar balance and make the filling too dense. Stick with 100% pure pumpkin puree for the best texture and flavor.

Why is my dump cake soupy in the middle?

This usually happens for one of two reasons: either you didn’t bake it long enough, or you cut into it too soon. Make sure the center is set (slightly jiggly but not liquid) before pulling it from the oven. Then let it rest for at least 20 minutes. The filling continues to set as it cools.

Can I use a different cake mix flavor?

Yes! Yellow cake mix is classic, but spice cake mix, butter pecan, or even white cake mix all work beautifully. Chocolate cake mix creates a more decadent version that pairs great with the peanut butter. Just avoid anything with pudding in the mix, as it can change the texture.

How do I make this dairy-free?

Use a dairy-free butter substitute (like Earth Balance or Miyoko’s), unsweetened oat milk or coconut milk in place of evaporated milk, and dairy-free chocolate peanut butter cups. Enjoy Life makes good allergy-friendly options. The texture will be slightly less rich, but still delicious.

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