Peanut Butter Brownies Recipe

There’s just something magical about the combination of chocolate and peanut butter. It’s rich, creamy, and satisfies every craving for something indulgent. These peanut butter brownies take that perfect pairing to the next level. With layers of fudgy chocolate, a smooth peanut butter filling, and a glossy ganache topping, this dessert is a showstopper—and surprisingly easy to make. They’re ideal for a potluck, a sweet treat for the family, or even just a cozy night in when you need a little chocolate therapy.

One bite, and you’ll see why these brownies are a keeper.

this RECIPE

The story behind my love for peanut butter brownies

Growing up, peanut butter was a staple in my house, usually spread on everything from toast to apples. But one year, I stumbled upon a peanut butter and chocolate dessert at a friend’s party, and it changed my life—or at least my dessert preferences. It was the first time I’d experienced that sweet, nutty, slightly salty magic paired with deep, rich chocolate. I remember asking for seconds, thirds, and (I’m not proud of this) sneaking another piece when no one was looking.

Fast forward to my own kitchen experiments, and these peanut butter brownies were born. I’ve played with many versions of this recipe, but this one—with its gooey peanut butter layer sandwiched between brownies and topped with silky chocolate ganache—feels like perfection. Every time I make them, I’m transported back to that first bite, and I can’t help but smile.

Chocolate and peanut butter: a love story

The combination of chocolate and peanut butter has been adored for decades. While chocolate brownies themselves have a rich history dating back to the late 19th century, adding peanut butter layers is a much more modern (and delicious) twist. Peanut butter desserts are deeply tied to American culinary traditions, with its creamy texture and salty-sweet flavor making it the perfect complement to chocolate’s richness. This recipe feels like a celebration of those two timeless flavors, layered into one perfect bite.

Let’s talk ingredients: why they work and swaps you can try

When it comes to these peanut butter brownies, every ingredient serves a purpose.

• Brownie mix: Using a boxed brownie mix is a simple shortcut that keeps this recipe easy and foolproof. I’ve used everything from dark chocolate to fudge brownie mixes, and they all work beautifully. Want to make it from scratch? Feel free to use your favorite homemade brownie recipe.
• Peanut butter: Creamy peanut butter is key here because it blends seamlessly into the filling. If you only have crunchy peanut butter on hand, it could work, but the texture might be chunkier. Looking for a healthier alternative? Almond butter or sunflower seed butter are great swaps, though the flavor will vary slightly.
• Butter and powdered sugar: These ingredients help create that smooth, luscious peanut butter layer. Salted butter works too, adding a slight savory balance.
• Chopped chocolate: For the ganache, I prefer semi-sweet chocolate because it’s not overly bitter or cloyingly sweet. If you love darker chocolate, feel free to use bittersweet, or opt for milk chocolate if you want something extra creamy.
• Heavy cream: This adds the velvety texture to the ganache, ensuring it’s smooth and spreadable. In a pinch, you can use half-and-half, but the ganache may be slightly thinner.

Kitchen gear you’ll need to make this

To whip up these peanut butter brownies, here’s what you’ll need:

• 9×9″ baking pan: This size works perfectly for thick brownies with distinct layers. If you only have an 8×8″ pan, just know the brownies will be a bit taller, and you may need to add a few minutes to the bake time.
• Mixing bowls: You’ll need at least three—one for the brownie batter, one for the peanut butter filling, and one for the ganache.
• Spatula: A rubber or silicone spatula makes it easy to spread the layers evenly.
• Microwave-safe bowl: This is for heating the cream for the ganache. Alternatively, you could heat it on the stovetop in a small saucepan.
• Parchment paper: Trust me, lining your pan with parchment paper will make lifting out the brownies a breeze (no sticking, no mess).

Step-by-step: making these brownies

1. Prep the pan and mix the brownie batter

Preheat your oven to 350°F, then line your 9×9″ pan with parchment paper and grease it lightly. This will prevent the brownies from sticking and make clean-up a breeze. Prepare the brownie mix as instructed on the box, and pour about two-thirds of the batter into the pan. Spread it evenly with a spatula—it doesn’t have to be perfect!

2. Make the peanut butter layer

In a mixing bowl, beat together the softened butter, peanut butter, and powdered sugar until smooth. If the mixture feels too thick to spread, add a splash of milk to loosen it up. Using a spoon, drop dollops of the peanut butter mixture on top of the brownie batter. No need to worry about perfect placement; it’ll spread a little during baking.

3. Add the remaining brownie batter

Pour the remaining third of the brownie batter on top of the peanut butter layer, and gently smooth it out with your spatula. This layer doesn’t have to cover the peanut butter completely—it creates a marbled effect that looks gorgeous when baked.

4. Bake and cool

Bake the brownies for about 30 minutes, or until a toothpick inserted into the center comes out clean. Let them cool completely in the pan. Trust me, waiting is the hardest part, but it’s worth it—this ensures your layers stay intact when you slice them.

5. Make the chocolate ganache

Heat the heavy cream in the microwave for about 30 seconds, or until it’s very hot (but not boiling). Pour the cream over the chopped chocolate in a bowl, then cover it and let it sit for a few minutes. Stir until smooth and glossy.

6. Assemble and chill

Pour the ganache over the cooled brownies, using a spatula to spread it evenly. Pop the pan into the fridge for about an hour to let the ganache set. Once firm, lift the brownies out using the parchment paper, slice into squares, and enjoy!

Creative ways to make these your own

Want to mix things up? Here are some fun variations:

• Gluten-free: Use a gluten-free brownie mix, and double-check that your other ingredients are gluten-free too.
• Vegan: Use a vegan brownie mix and substitute plant-based butter, a dairy-free peanut butter, and coconut cream for the ganache.
• Nut-free: Swap the peanut butter for sunflower seed butter to make these safe for nut allergies.
• Extra chocolatey: Add chocolate chips to the brownie batter for little bursts of melty chocolate in every bite.
• Spicy kick: Stir a pinch of cayenne or chili powder into the brownie batter for a subtle heat that pairs beautifully with the chocolate.

How to serve these brownies

These brownies are stunning on their own, but a little presentation never hurts! Serve them on a platter with a sprinkle of flaky sea salt on top for a gourmet touch. For a decadent dessert, pair them with a scoop of vanilla ice cream or a dollop of whipped cream. If you’re hosting a party, arrange them on a tiered tray for a show-stopping centerpiece.

Perfect drink pairings for peanut butter brownies

Since these brownies are rich and indulgent, a lighter beverage makes the perfect pairing. Here are a few options:

• Milk: Classic and comforting, a cold glass of milk (dairy or plant-based) balances the richness of the brownies.
• Iced coffee: The slight bitterness of coffee cuts through the sweetness beautifully.
• Hot chocolate: Go all-in on the chocolate theme with a mug of creamy hot cocoa.
• Chai tea: The warm spices in chai complement the nutty flavor of the peanut butter layer.
• Sparkling water with lemon: For something refreshing, a citrusy sparkling water cleanses the palate between bites.

Storing and reheating your brownies

To store these brownies, keep them in an airtight container in the fridge for up to 5 days. The ganache will stay firm and glossy, and the flavors actually deepen after a day or two. If you want to freeze them, wrap individual slices in plastic wrap and place them in a freezer-safe container. They’ll last up to 3 months this way—just thaw in the fridge overnight before serving.

If you like your brownies warm (and who doesn’t?), microwave a slice for about 10 seconds. The ganache will soften slightly, and the brownie will become irresistibly gooey.

Scaling the recipe up or down

If you’re baking for a crowd, you can easily double the recipe and bake it in a 9×13″ pan. Keep an eye on the bake time—it might take a few extra minutes. For a smaller batch, halve the recipe and use a loaf pan, though you’ll need to adjust the baking time accordingly.

Potential hiccups (and how to avoid them)

• Ganache too runny: If your ganache isn’t thickening, it might need more chocolate. Stir in a bit more chopped chocolate until the consistency improves.
• Brownies sinking in the middle: This can happen if you overmix the batter or take the brownies out too early. Make sure your toothpick test comes out clean!
• Peanut butter layer too thick to spread: Add a splash of milk to loosen it up and make it more spreadable.

Ready to bake?

These peanut butter brownies are the ultimate treat for chocolate and peanut butter lovers alike. Whether you’re baking for a party or just because, they’re guaranteed to impress. Have fun experimenting with the layers, flavors, and toppings to make this recipe your own. And don’t forget to grab a glass of milk—or your favorite drink—before diving into your first (or third) bite!

FAQs

1. Can I use natural peanut butter?
Yes, but make sure to stir it thoroughly before using so it’s smooth and not oily.

2. What’s the best way to slice these brownies?
Use a sharp knife warmed under hot water, then wipe it clean between cuts for perfect slices.

3. Can I make these brownies ahead of time?
Absolutely! They taste even better the next day. Just store them in the fridge until you’re ready to serve.

4. Can I skip the ganache?
You can, but the ganache adds a luxurious finish that ties everything together. If you skip it, dust the brownies with powdered sugar for a simple topping.

5. What’s the best way to reheat them?
A quick 10-second zap in the microwave softens the brownies without melting the ganache completely.

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