The Peanut Butter Cup Dump Cake That’s Dangerously Easy

You know those recipes that feel almost too good to be true? The ones where you dump a few things in a bowl, stir, bake, and somehow end up with something that looks and tastes like you spent hours in the kitchen? This is that cake.

It starts with chocolate cake mix. And chocolate pudding mix. And milk. And a whole bag of mini Reese’s peanut butter cups, chopped into little pieces of heaven. You stir it all together, pour it in a pan, bake it, and what comes out is a rich, fudgy, peanut-buttery masterpiece that disappears faster than you can say “seconds.”

I’ve made this for parties, for potlucks, for no reason at all except that I wanted something chocolate and peanut butter and didn’t want to work for it. It never fails. It’s the kind of dessert people hover around, the one that gets requested again and again. And the best part? No one has to know how easy it was.

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Why This Cake Is a Showstopper

• Dump and Go. No mixer, no creaming butter, no complicated steps. Dump, stir, bake. That’s it.
• Chocolate + Peanut Butter = Perfection. It’s a classic combination for a reason. Every bite has pockets of gooey peanut butter cup.
• The Pudding Mix Trick. It makes the cake extra moist and fudgy. Don’t skip it.
• Everyone Loves It. Kids, adults, picky eaters—everyone goes back for seconds.

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What You’ll Need

• 1 (15.25 oz) box chocolate cake mix – Any brand. Devil’s food works great too.
• 1 (3.4 oz) box chocolate instant pudding mix – This is the secret to the fudgy texture.
• 1 ¾ cups milk – Whole milk gives the richest result, but any milk works.
• 1 (8 oz) package mini Reese’s peanut butter cups, chopped – Or regular-sized, chopped into pieces.

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Let’s Make It

Step 1: Preheat and Prep
Preheat your oven to 350°F (175°C). Grease a 13×9-inch baking dish with non-stick spray or butter.

Step 2: Mix the Pudding
In a large mixing bowl, combine the milk and chocolate instant pudding mix. Whisk vigorously until the pudding mix is fully dissolved and smooth.

Step 3: Add the Cake Mix
Add the chocolate cake mix to the pudding mixture. Stir until everything is well combined. The batter will be thick and luscious—that’s exactly what you want.

Step 4: Fold in the PB Cups
Gently fold in the chopped mini Reese’s peanut butter cups. Make sure they’re evenly distributed so every slice gets a little peanut butter surprise.

Step 5: Pour and Bake
Pour the batter into the prepared baking dish. Use a spatula to spread it evenly. Bake for about 25 minutes, until a toothpick inserted into the center comes out clean.

Step 6: Cool and Serve
Let the cake cool slightly before serving. It’s delicious warm, at room temperature, or even cold from the fridge. Top with whipped cream or vanilla ice cream for the full experience.

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Peanut Butter Cup Dump Cake

Prep Time	Bake Time	Total Time	Servings
10 minutes	25 minutes	35 minutes	12-16

A Few Things I’ve Learned

• Don’t overmix. Stir just until everything comes together. Overmixing = tough cake.
• Chop those PB cups. Even distribution means every bite gets peanut butter goodness. No one wants a piece with zero cups and one with three.
• Cool slightly before slicing. It’ll hold together better if you give it a few minutes.
• The pudding mix is not optional. It’s what makes this cake so moist and fudgy. Don’t skip it.

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Ways to Make This Your Own

• Nutty Twist: Add chopped peanuts or almonds to the batter.
• Salted Caramel Drizzle: Drizzle caramel sauce over each slice and sprinkle with sea salt.
• Double Chocolate: Add chocolate chips to the batter along with the PB cups.
• Cookie Crumble Topping: Sprinkle crushed chocolate sandwich cookies on top before baking.
• Marshmallow Fluff Swirl: Swirl marshmallow fluff into the batter before baking.
• Frozen PB Cups: Use frozen peanut butter cups for a firmer texture in the warm cake.

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Your Cake Questions, Answered

Q: Can I use a different cake mix flavor?
A: Yes. Vanilla, devil’s food, or chocolate fudge all work. The chocolate + peanut butter combo is classic, but feel free to experiment.

Q: Can I use regular-sized peanut butter cups?
A: Yes. Chop them into smaller pieces so they distribute evenly.

Q: Is the pudding mix necessary?
A: Yes. It adds moisture and creates that fudgy, dense texture. Without it, the cake will be lighter and less rich.

Q: Can I make this gluten-free?
A: Yes. Use a gluten-free chocolate cake mix and gluten-free pudding mix. Check your peanut butter cups too.

Q: How do I store leftovers?
A: In the fridge for 3-4 days. Or freeze individual slices wrapped in plastic wrap for up to 3 months.

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