Because there is no such thing as too much chocolate when we're talking about dessert, right?
Try adding:
- Semi-sweet chocolate chips
- Milk chocolate chips
- Peanut butter chips
- White chocolate chips
Add a little sea salt
A light sprinkle of flaky sea salt over the finished dessert can beautifully balance the sweetness and make the chocolate and peanut butter flavors pop.
How to Make Easy Peanut Butter Cup Dessert Bars
Step 1: Preheat the oven
Preheat your oven according to the recipe temperature, typically around 350°F.
Grease your clear glass 9x13-inch baking dish lightly so the finished dessert is easier to serve.
Step 2: Add the peanut butter cups
Spread the whole, unwrapped mini peanut butter cups evenly across the bottom of the baking dish.
Don't chop them.
That's part of the fun!
As they bake, they'll soften and create delicious pockets of chocolate and peanut butter throughout the dessert.
Step 3: Prepare the cake mixture
In a large bowl, combine the cake mix, melted butter, and eggs.
Stir until you have a thick, cookie-dough-like mixture.
It will be much thicker than a traditional cake batter.
That's exactly what you want.
Step 4: Add the chocolate chips
Fold the chocolate chips into the mixture.
Now you've got even more chocolate goodness heading into that baking dish.
Step 5: Layer it over the peanut butter cups
Carefully spoon the thick mixture over the peanut butter cups.
Spread it as evenly as possible.
Don't worry if it doesn't look perfect.
Once it goes into the oven, everything starts coming together.
Step 6: Bake
Place the baking dish in the preheated oven and bake until the top is golden and the center is set.
The exact baking time can vary depending on your oven and how soft or firm you prefer the finished dessert.
Keep an eye on the edges—they should look set while the center can still have a little softness.
Step 7: Cool and slice
Allow the dessert to cool before cutting.
This part requires patience.
I know.
You just spent the last half hour smelling chocolate and peanut butter, and now I'm telling you to wait?
But letting it cool gives the dessert time to firm up, making it much easier to slice.
For an extra-gooey dessert, serve it slightly warm with a scoop of vanilla ice cream.
Now we're talking!
What to Serve With Peanut Butter Cup Dessert Bars
These bars are fantastic on their own, but a few simple toppings can turn them into an over-the-top dessert.
Try serving them with:
- Vanilla ice cream
- Whipped cream
- Chocolate syrup
- Caramel sauce
- Peanut butter drizzle
- Chopped peanuts
- Powdered sugar
My personal favorite?
Warm dessert + vanilla ice cream + chocolate drizzle.
The cold, creamy ice cream slowly melts over the warm chocolate and peanut butter.
Absolutely dreamy.
Tips for Making the Best Peanut Butter Cup Dessert
Don't skip the greasing step
Even with all that chocolate and peanut butter goodness, you don't want the finished dessert sticking stubbornly to the baking dish.
A light coating of cooking spray or butter helps.
Don't overbake
This is probably the most important tip.
If you want a soft, chewy, gooey center, avoid leaving the dessert in the oven too long.
The bars will continue to firm up as they cool.
Let it cool before slicing
If you cut into it immediately, the center may be extremely soft.
That's not necessarily a bad thing—it can actually be delicious served warm with ice cream—but it won't give you neat bars.
Use a clear glass baking dish
A glass 9x13 dish makes it easy to see how the dessert is progressing around the edges.
Just remember that glass cookware can behave differently from metal pans, so keep an eye on the dessert as it approaches the end of its baking time.
Don't crowd the peanut butter cups
Spread them into an even layer so you get pockets of chocolate and peanut butter throughout the dessert rather than one giant cluster.
How to Store Leftovers
Once completely cooled, cover the baking dish tightly or transfer the bars to an airtight container.
Store according to the storage directions appropriate for the specific ingredients used.
For the best texture, allow refrigerated bars to come closer to room temperature before serving.
You can also gently warm individual portions before serving.
Can You Freeze These Dessert Bars?
Yes.
Once completely cooled, cut the bars into individual portions and wrap them well.
Place them in a freezer-safe container or bag.
When you're ready for a treat, thaw them in the refrigerator and then allow them to come closer to room temperature—or warm them gently for that fresh-from-the-oven texture.
Frequently Asked Questions
Can I use regular-size peanut butter cups?
You can, but mini peanut butter cups distribute more evenly throughout the dessert. If using larger cups, chop them into smaller pieces first.
Can I use chocolate cake mix?
Absolutely!
Chocolate cake mix will give you an even richer chocolate flavor.
Can I make this dessert ahead of time?
Yes. It's actually a great make-ahead dessert for parties and gatherings.
Bake it ahead, let it cool completely, cover it, and store it until you're ready to serve.
Can I serve it warm?
Definitely!
Warm it gently and serve it with vanilla ice cream for an especially indulgent dessert.
Why is my dessert too gooey?
If the center is extremely soft, it may simply need additional cooling time. If it remains underbaked after cooling, return it to the oven briefly and continue baking until the center is properly set.
How do I get clean slices?
Allow the dessert to cool completely before slicing.
For especially neat cuts, chill it briefly and use a sharp knife.
Can I add peanut butter chips?
Absolutely. Peanut butter chips will intensify that classic peanut butter flavor.
Recipe at a Glance
Recipe: Peanut Butter Cup Dessert Bars
Prep Time: About 10 minutes
Bake Time: About 25–35 minutes, depending on your oven and desired texture
Total Time: About 40–50 minutes
Servings: About 12–16 bars
Difficulty: Easy
Pan: 9x13-inch baking dish
Approximate Nutrition
Nutritional values will vary depending on the specific cake mix, peanut butter cups, chocolate chips, and other ingredients used.
For a rough estimate, one bar may contain approximately:
- Calories: 300–400
- Carbohydrates: 40–50g
- Fat: 14–20g
- Protein: 4–7g
- Sugar: 25–35g
For the most accurate information, calculate the nutrition using the exact brands and quantities in your kitchen.
Final Thoughts
I love recipes like this because they prove that a spectacular dessert doesn't have to be complicated.
You start with a handful of simple ingredients, spread everything into a 9x13 baking dish, and let the oven work its magic.
Then comes the best part: pulling that bubbling, golden dessert from the oven and smelling chocolate and peanut butter filling the kitchen.
Your family may think you spent hours making it.
You don't have to tell them how easy it really was!
Serve it warm with vanilla ice cream, bring it to your next gathering, or keep a pan around for those nights when everyone suddenly needs something sweet.
Either way, prepare yourself for one question:
“When are you making this again?”
More Easy Dessert Recipes to Try
If chocolate and peanut butter have you craving more sweet treats, you might also enjoy:
- Chocolate Peanut Butter Cookie Bars
- Easy No-Bake Peanut Butter Pie
- Chocolate Chip Cookie Bars
- Peanut Butter Fudge
- Brownie Cheesecake Bars
- Easy Chocolate Dump Cake
- Peanut Butter Chocolate Rice Krispie Treats
Did You Make This Recipe?
If you make these Peanut Butter Cup Dessert Bars, I'd love to hear how they turned out!
Leave a review and tell me whether you served them warm, chilled, or topped with a giant scoop of vanilla ice cream.
And if you take a photo, share it on Pinterest so other dessert lovers can discover this wonderfully easy recipe too!
Sometimes the simplest recipes are the ones everyone remembers.
