Okay, let’s talk real talk for a minute. If you believe, deep down in your soul, that a dessert isn’t truly decadent unless it’s ridiculously dense, sticky, and probably requires a napkin (or three), then you and I are going to be fast friends. I spent years chasing that perfect, almost underbaked, fudgy center. I tried every trick—every melted chocolate bar, every extra egg yolk—but nothing hit the mark quite like this recipe. When I finally combined that rich, dark chocolate base with actual peanut butter cups layered right in the middle? Wow. These **Reeses Brownies** are the absolute peak of easy baking magic. You won’t even want to look at a box mix again, trust me!
Why You Will Love These Reeses Brownies
I mean, look, there are brownies, and then there are THESE brownies. If you need a fast, show-stopping dessert, stop scrolling right now. You’re going to be obsessed:
- They are incredibly fudgy—seriously, melt-in-your-mouth fudgy.
- Layering the peanut butter cups makes the flavor absolutely intense!
- Clean-up is practically nonexistent thanks to the parchment paper trick.
- They are the perfect rich treat to share (if you can manage to share them!).
If you want another great peanut butter treat, check out my buckeye brownies while you’re gathering your ingredients!
Essential Ingredients for Perfect Reeses Brownies
Okay, you know I’m all about simplicity, but when it comes to fudgy texture, we cannot cut corners on the fat and sugar ratios. These ingredients are non-negotiable if you want that chewy edge and gooey center. Don’t forget to check out my recipe for the Giant Reeses Peanut Butter Pie if you’re having a major craving!
Here’s the exact lineup you need for your mix:
First, we must have the fat: 1 cup of unsalted butter, and yes, you need to melt it before you start whisking. Then comes the backbone of that fudgy structure—we use both sugars! That’s 1 full cup of granulated sugar AND 1 cup of firmly packed brown sugar. That brown sugar is key for that deep molasses flavor!
For richness, we need 4 large eggs, beaten in one at a time. Don’t forget a teaspoon of vanilla; it just brightens everything. Then the dry stuff: 1 cup of all-purpose flour and 3/4 cup of unsweetened cocoa powder. Make sure you sift the cocoa so you don’t get little dry pockets—nobody likes those!
A half teaspoon of salt balances the sweetness so nicely. And if you like a little crunch, feel free to fold in about a half cup of chopped walnuts, but honestly, you can skip them if nuts aren’t your thing. The star, of course, is the topping: 12 peanut butter cups, chopped up and ready for layering!
Step-by-Step Instructions to Make Reeses Brownies
Making these beauties couldn’t be easier, even though they taste like they took hours! We follow a few simple rules here. Remember, baking should be fun, not stressful. If you want to see what else I’ve baked up, check out my recipe for an Epic Homemade Starbucks Double Chocolate Brownie for another gooey option!
Preparing the Pan and Oven for Your Reeses Brownies
First things first, get your oven cranked up to 350 degrees F (that’s 175°C). Then, grab your 9×13 inch pan and line it completely with parchment paper. You want those big overhangs on the sides, trust me on this one—it’s how we get these babies out in one perfect, glistening slab!
Mixing the Wet and Dry Components of the Reeses Brownies Batter
Start by melting your butter gently on low heat. Once it’s liquid gold, remove it from the stove and immediately whisk in both the granulated and brown sugars until they look smooth. Now, this is important: beat in your eggs one at a time, making sure each one is totally incorporated before you add the next. Stir in the vanilla quickly. In a separate bowl, just whisk your flour, cocoa, and salt together. Then, add the dry stuff to the wet stuff—but stop stirring as soon as you don’t see streaks of flour. Seriously, do not overmix, or you’ll get cake instead of fudge!
Layering and Baking Your Ultimate Reeses Brownies
Time for the fun part! Spread exactly half of your beautiful, barely-mixed batter into that prepared pan. Sprinkle half of your chopped peanut butter cups right over that first layer. Smooth the remaining batter over the top gently. Finish by sprinkling the last of those wonderful cups right over the top surface! They bake for about 25 to 30 minutes. When you test it, you are looking for moist crumbs on the toothpick, not a clean stick. That means it’s fudgy perfection!
Tips for Achieving Fudgy Reeses Brownies Perfection
If you want that rich, dense texture that practically oozes chocolate, you have to respect the bake time. My little secret, which I learned through many late-night kitchen experiments, is to slightly underbake these. The recipe tells you to look for moist crumbs, and trust me, you want those moist crumbs! Pull them out when you think they might be *just* underdone.
Another thing I preach about when it comes to any chocolate baking: use high-quality cocoa powder. If you use anything labeled “Dutch-processed,” you’ll notice a smoother, darker, almost black color, which works beautifully with the peanut butter. It gives the brown base a deeper, less sharp chocolate flavor. It really makes the Reeses stand out!
Also, remember that the peanut butter cups are dense and full of fat. They release a little oil as they melt, which helps keep the surrounding brownie gooey. For more intense fudge tips, you absolutely must read my guide on fudgy zucchini brownies—the technique for fat content is virtually the same!
Ingredient Notes and Substitutions for Reeses Brownies
Let’s talk about those nuts! The recipe calls for chopped walnuts, but honestly, if you aren’t a fan, just leave them out. These are your Reeses Brownies, so you get to call the shots! If you want *some* crunch, chopped pecans are a lovely swap that pairs nicely with peanut butter.
Now, what if you’re completely out of those iconic peanut butter cups or maybe just need to stretch the topping a little further? No problem! Try swapping out half the cups for a mix of peanut butter chips and regular semi-sweet chocolate chips. That way, you still get that creamy-salty peanut butter hit, but you balance it out with more melted chocolate goodness.
Storing and Reheating Your Delicious Reeses Brownies
Since these are so rich, they actually hold up beautifully, which is great news for resisting the urge to eat them all in one sitting! Store them in an airtight container. I usually keep mine right on the counter at room temperature, and they stay perfectly soft for three or four days.
If you somehow manage to have leftovers longer, the fridge works too, though they might firm up a bit. If you want to bring that fresh-out-of-the-oven gooeyness back? Pop one square in the microwave for just 10 seconds. That little blast of heat melts the remaining peanut butter cup bits just perfectly. They are dangerous warm, just saying!
Serving Suggestions for These Reeses Brownies
You absolutely have to taste test one warm—just pull it out of the pan, be careful! But if you want to take this over the top, you need cold contrast. A scoop of good quality vanilla bean ice cream melting right over the warm edges? Forget about it! It’s pure heaven.
If you’re serving these at a party, a simple tall glass of ice-cold milk cuts through the richness perfectly. Or, if you’re feeling extra, you can whip up my recipe for the Ultimate Chocolate Milkshake and serve a small brownie alongside it!
Frequently Asked Questions About Reeses Brownies
I know you probably have a few burning questions once you get a look at this decadent recipe! We bake what we love, and I’ve answered the ones I get asked the most about achieving perfection.
What is the secret to making fudgy Reeses Brownies?
It all comes down to ratios and patience! Fudgy texture comes from using plenty of fat (butter and sugar) and *not* overmixing the flour. If you mix too much, you develop gluten, and that is the recipe for cakey brownies, not the fudgy ones we want here!
Can I make these Reeses Brownies ahead of time?
Oh yes, you absolutely can! These are even better the next day once they set up completely. Store them in an airtight container at room temperature, and they’ll be ready whenever that craving hits. Perfect for potlucks!
What is the best way to cut clean squares?
This is my favorite kitchen hack! You *must* cool the pan completely—at least two hours—before trying to cut. Then, take a long, sharp knife, dip it in hot water, wipe it dry, and cut. Reheat that knife between every cut for the smoothest edges imaginable!
If you need a single-serving fix right now, check out my brownie in a mug recipe, but these layered beauties are worth the wait!
Estimated Nutritional Information for This Recipe
Now, I hate to put a number on something this joyful, but I know some of you need the details! Keep in mind, since we’re piling on the peanut butter cups and using a generous amount of butter, these are definitely an indulgent treat. These numbers are my best estimate based on the ingredients listed in the recipe card.
Think of these estimates as a general guide—if you use low-fat peanut butter cups or cut back on the nuts (if you even dare!), those numbers will shift a little. My goal is always flavor first, but here’s the breakdown per serving:
- Serving Size: 1 brownie square
- Calories: 350
- Sugar: 35g
- Fat: 22g (with 10g saturated)
- Carbohydrates: 38g
- Protein: 5g
- Cholesterol: 75mg
If you’re following a specific plan, you might want to calculate for sodium and unsaturated fats too. Again, this is for a recipe that’s meant to wow a crowd, so enjoy it responsibly—or don’t, I won’t tell!
Print
Peanut Butter Cup Brownies
- Total Time: 45 min
- Yield: 16 servings 1x
- Diet: Vegetarian
Description
Rich, fudgy brownies topped with melted peanut butter cups.
Ingredients
- 1 cup unsalted butter
- 1 cup granulated sugar
- 1 cup packed brown sugar
- 4 large eggs
- 1 teaspoon vanilla extract
- 1 cup all-purpose flour
- 3/4 cup unsweetened cocoa powder
- 1/2 teaspoon salt
- 1/2 cup chopped walnuts (optional)
- 12 peanut butter cups, chopped
Instructions
- Preheat your oven to 350 degrees F (175 degrees C). Line a 9×13 inch baking pan with parchment paper, leaving an overhang on the sides.
- Melt the butter in a medium saucepan over low heat. Remove from heat.
- Whisk the granulated sugar and brown sugar into the melted butter until combined.
- Beat in the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.
- In a separate bowl, whisk together the flour, cocoa powder, and salt.
- Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Do not overmix. Fold in the chopped walnuts, if using.
- Spread half of the batter into the prepared baking pan. Sprinkle half of the chopped peanut butter cups over the batter.
- Spread the remaining batter over the peanut butter cups. Top with the remaining peanut butter cups.
- Bake for 25 to 30 minutes. A toothpick inserted near the edge should come out with moist crumbs attached.
- Let the brownies cool completely in the pan before lifting out by the parchment paper overhang and cutting into squares.
Notes
- For extra fudgy texture, slightly underbake the brownies.
- You can substitute milk chocolate chips for some of the peanut butter cups.
- Prep Time: 15 min
- Cook Time: 30 min
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 brownie square
- Calories: 350
- Sugar: 35
- Sodium: 150
- Fat: 22
- Saturated Fat: 10
- Unsaturated Fat: 12
- Trans Fat: 0
- Carbohydrates: 38
- Fiber: 2
- Protein: 5
- Cholesterol: 75
Keywords: brownies, peanut butter cups, chocolate, dessert, fudgy, baked goods