Peanut Butter Swirl Brownies Recipe Easy and Fudgy

When it comes to indulgent desserts, few things compare to the rich, fudgy goodness of brownies—especially when they’re topped with creamy peanut butter swirls. These Ultimate Peanut Butter Swirl Brownies are everything you could want in a dessert: gooey, chocolatey, and just the right amount of nutty. If you’re a fan of brownies and peanut butter, you’re in for a treat!

This recipe is perfect for any occasion, whether you’re baking for a special event, a casual family gathering, or just because you need something sweet. Trust me, these brownies will disappear almost as quickly as they come out of the oven!

The Story Behind Peanut Butter Swirl Brownies

Brownies have been a dessert staple in American kitchens since the early 20th century, and their versatility has made them a favorite for bakers of all levels. Adding peanut butter to this classic treat? A total game-changer. The marriage of chocolate and peanut butter is one of the most beloved flavor combinations, and for good reason—it’s pure magic.

My love for this recipe stems from childhood memories of sneaking spoonfuls of peanut butter while my mom baked chocolate desserts. One day, she surprised us by swirling peanut butter into her brownie batter, creating a dessert so decadent that we begged her to make it again and again. Over the years, I’ve refined her recipe, adjusting the ratios to create the perfect balance of rich chocolate and creamy peanut butter.

These brownies are especially popular in the cooler months when comforting desserts reign supreme, but honestly, they’re a hit year-round. Whether you serve them warm with a scoop of vanilla ice cream or enjoy them straight from the pan, these brownies deliver every time.

Ingredients for Ultimate Peanut Butter Swirl Brownies

To create the perfect peanut butter swirl brownies, the ingredients you choose matter. Let’s dive into what you’ll need and why:

• Unsalted Butter: Butter gives these brownies their rich, fudgy texture. Make sure it’s unsalted so you can control the saltiness.
• Granulated Sugar: Regular white sugar adds sweetness and helps create that classic brownie crackle on top.
• Brown Sugar: Adds a hint of molasses flavor and keeps the brownies moist.
• Cocoa Powder: Opt for unsweetened cocoa powder for an intense chocolate flavor. Dutch-processed cocoa works well too.
• All-Purpose Flour: Just enough to hold everything together without making the brownies too cakey.
• Eggs: Eggs add structure and richness to the batter. Bring them to room temperature before mixing.
• Vanilla Extract: Enhances the chocolate flavor and adds depth.
• Peanut Butter: Creamy peanut butter works best for swirls, but you can use chunky if you prefer a bit of texture. Make sure it’s the regular kind, not natural peanut butter, as the oils can separate.
• Chocolate Chips: Optional, but adding a handful of chocolate chips takes these brownies to the next level.

For substitutions, you can use coconut oil instead of butter, almond flour for a gluten-free version, or even a sugar substitute if you’re watching your sugar intake. Just keep in mind that each swap may slightly alter the texture and flavor.

Equipment You’ll Need

Here’s what you’ll need to make these ultimate peanut butter swirl brownies:

• 9×9-inch Baking Pan: This size is ideal for thicker brownies. You can use an 8×8 pan for even thicker results or a 9×13 pan for thinner ones.
• Parchment Paper: Makes cleanup a breeze and ensures your brownies won’t stick to the pan.
• Mixing Bowls: At least two bowls—one for the brownie batter and one for the peanut butter mixture.
• Whisk and Spatula: A whisk for mixing the batter and a spatula for folding in ingredients and swirling the peanut butter.

If you don’t have parchment paper, greasing the pan generously with butter or non-stick spray works too. And if you don’t own a whisk, a fork will do in a pinch!

How to Make Peanut Butter Swirl Brownies

1. Preheat the Oven: Set your oven to 350°F (175°C). Line your baking pan with parchment paper, leaving some overhang for easy removal.
2. Melt the Butter: In a microwave-safe bowl, melt 1 cup (227g) of unsalted butter. Let it cool slightly.
3. Mix the Sugars: Add 1 cup (200g) granulated sugar and 1/2 cup (100g) brown sugar to the melted butter. Whisk until smooth.
4. Add the Eggs and Vanilla: Mix in 3 large eggs (one at a time) and 1 teaspoon vanilla extract. Whisk until the mixture is glossy.
5. Incorporate the Cocoa and Flour: Sift in 1/2 cup (50g) cocoa powder and 1 cup (120g) all-purpose flour. Fold gently until just combined.
6. Pour the Batter: Spread the brownie batter evenly into the prepared pan.
7. Prepare the Peanut Butter Swirl: In a small bowl, stir 1/2 cup (120g) creamy peanut butter until smooth. If it’s too thick, microwave for 10 seconds.
8. Create the Swirls: Drop spoonfuls of peanut butter onto the brownie batter. Use a knife or skewer to swirl it into the batter, creating a marbled effect.
9. Bake: Bake for 30-35 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.
10. Cool: Let the brownies cool completely in the pan before cutting them into squares.

Pro tip: For cleaner cuts, chill the brownies in the refrigerator for 20-30 minutes before slicing.

Cooking Tips & Techniques

Here are some tips to make sure your peanut butter swirl brownies turn out perfect every time:

• Don’t Overmix: Overmixing the batter can lead to tough brownies. Fold the ingredients gently until just combined.
• Watch the Baking Time: Every oven is different, so start checking your brownies a few minutes early. You want them fudgy, not dry.
• Use Room-Temperature Ingredients: Eggs and butter mix better when they’re at room temperature, leading to a smoother batter.

And if you’re tempted to skip the parchment paper, don’t! It makes getting the brownies out of the pan so much easier.

Variations & Adaptations

Want to customize your brownies? Here are some ideas:

• Gluten-Free Version: Use a 1:1 gluten-free flour blend.
• Nut-Free Option: Replace peanut butter with sunflower seed butter.
• Extra Chocolatey: Stir in 1/2 cup of chocolate chips or chunks to the batter.

I once tried adding a sprinkle of sea salt on top after baking—game-changer! It adds a salty contrast to the sweetness.

Serving & Storage Suggestions

These brownies are best served slightly warm, with a glass of milk or a scoop of vanilla ice cream. They’re also a hit at potlucks and bake sales.

For storage, keep them in an airtight container at room temperature for up to 3 days. If you need to store them longer, they freeze beautifully for up to 3 months. Just wrap them in plastic wrap and store in a freezer bag.

Nutritional Information & Benefits

Each brownie (assuming 16 servings) contains approximately:

• Calories: 220
• Fat: 12g
• Sugar: 18g
• Protein: 4g

Peanut butter adds protein and healthy fats, while cocoa powder is rich in antioxidants. Just be mindful of portion sizes if you’re watching your calorie intake!

Conclusion

If you’ve been searching for the perfect dessert that balances chocolatey richness with creamy peanut butter goodness, this is it. These Ultimate Peanut Butter Swirl Brownies are a true crowd-pleaser, and they’re surprisingly easy to make.

I’d love to hear how yours turn out! Leave a comment below or tag me on social media with your creations. Happy baking!

FAQs

Can I use natural peanut butter for this recipe?

It’s best to use regular peanut butter since natural peanut butter can separate and affect the texture of the swirls.

How do I know when the brownies are done?

Look for a toothpick inserted into the center to come out with a few moist crumbs. If it’s completely clean, they may be overbaked.

Can I double this recipe?

Yes! Use a 9×13-inch pan and increase the baking time by about 5-10 minutes.

What’s the best way to store these brownies?

Store in an airtight container at room temperature for up to 3 days or freeze for up to 3 months.

Can I make these brownies dairy-free?

Swap the butter for coconut oil and ensure your chocolate chips are dairy-free.

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