Everything we love about fudgy brownies and rich peanut butter cookies—all baked into one epic, gooey, sweet-and-salty treat. With swirls of chocolate and creamy peanut butter in every bite, these cookies are soft in the center, slightly crisp at the edges, and absolutely impossible to eat just one.
They’re perfect for bake sales, cookie swaps, or just when you can’t decide between brownies and cookies (so you make both in one!). Ready to get swirly?
Why You’ll Love These Cookies
- Two desserts in one – rich brownie meets peanut butter cookie
- Beautifully swirled – stunning and totally bakery-worthy
- Soft, chewy centers with crisp edges
- No chill time needed – ready to bake right away
- Perfect for gifting, parties, or freezing for later
These cookies taste like your favorite brownie and peanut butter cup had a cookie baby—and yes, they’re as good as they sound.
Ingredients
Peanut Butter Dough:
- ½ cup unsalted butter, softened
- ½ cup creamy peanut butter
- ½ cup brown sugar
- ¼ cup granulated sugar
- 1 large egg
- 1 tsp vanilla extract
- 1¼ cups all-purpose flour
- ½ tsp baking soda
- ¼ tsp salt
Brownie Dough:
- ½ cup unsalted butter
- ¾ cup granulated sugar
- ½ cup unsweetened cocoa powder
- 1 large egg
- 1 tsp vanilla extract
- ¾ cup all-purpose flour
- ½ tsp baking powder
- ¼ tsp salt
Tip: You can use natural peanut butter, but the texture may be softer. For best results, stick with classic creamy peanut butter (like Jif or Skippy).
Instructions
1. Preheat and Prep
Preheat your oven to 350°F (175°C) and line 2 baking sheets with parchment paper.
2. Make the Peanut Butter Dough
- In a large bowl, cream together butter, peanut butter, brown sugar, and granulated sugar until light and fluffy (about 2–3 minutes).
- Beat in the egg and vanilla extract.
- Add flour, baking soda, and salt. Mix until a soft dough forms.
- Set aside.
3. Make the Brownie Dough
- In a separate bowl, melt butter in the microwave or on the stovetop.
- Whisk in sugar and cocoa powder until smooth and glossy.
- Beat in the egg and vanilla.
- Stir in flour, baking powder, and salt until just combined.
The brownie dough will be thicker and more dense than the peanut butter dough—that’s okay!
4. Combine the Doughs
- Scoop about 1 tablespoon of each dough and press them together into a rough ball.
- Gently swirl them together by rolling lightly in your hands. Don’t overmix—you want to see both doughs.
- Place on the prepared baking sheet, spaced 2 inches apart.
Optional: Press a few chocolate chips or peanut butter chips on top for extra flair.
5. Bake
Bake for 10–12 minutes, or until the edges are set and the centers are still soft.
Let cool on the pan for 5 minutes before transferring to a wire rack.
How to Serve
- Warm with a glass of cold milk
- Sandwiched with ice cream for the ultimate dessert
- On a cookie tray with other treats (these are a star!)
- Gifted in a box or tin with a handwritten tag
- Crumbled over vanilla ice cream (trust me on this)
Tips for Success
- Don’t over-swirl – you want visible peanut butter and brownie streaks
- Use a cookie scoop – for uniform cookies that bake evenly
- Underbake slightly – they’ll finish setting as they cool for that fudgy center
- Cool on the pan first – they’re soft right out of the oven
- Double the batch – these freeze beautifully and disappear fast
Variations
Add Chocolate Chips
Mix ½ cup chocolate chips into the brownie dough for extra gooeyness.
Reese’s Remix
Fold in chopped mini peanut butter cups or top each cookie with one.
Nutty Crunch
Add chopped peanuts or walnuts for texture.
Salted Finish
Sprinkle with flaky sea salt right after baking to balance the sweetness.
Vegan Option
Use dairy-free butter, plant-based egg replacer, and a flax egg (1 tbsp flaxseed + 3 tbsp water) for each egg.
Storage
Room Temp:
Store in an airtight container for up to 5 days.
Fridge:
Keep for up to 1 week (great for chewier texture).
Freezer:
Freeze baked cookies for up to 2 months. Let thaw at room temp or warm in the microwave for 10–15 seconds before serving.
You can also freeze unbaked dough balls and bake from frozen—just add 1–2 minutes to the bake time.
FAQ
Can I use a boxed brownie mix for the brownie dough?
Yes! Use about 1½ cups of prepared brownie mix dough. The texture will be softer, but still delicious.
Can I make the dough ahead?
Absolutely. Both doughs can be made and stored (separately) in the fridge for up to 2 days. Bring to room temp before swirling and baking.
What kind of cocoa powder should I use?
Natural unsweetened cocoa powder works best. Dutch-process can be used for a richer flavor, but may alter the texture slightly.
Can I use crunchy peanut butter?
Yes! It adds great texture—just be sure it’s well-stirred and not too oily.
Conclusion
Peanut Butter Brownie Swirl Cookies are the ultimate mashup for dessert lovers—soft, fudgy, nutty, and totally addictive. They’re easy to make, beautiful to look at, and even better to eat. Whether you’re baking for a special occasion or just treating yourself, these cookies deliver that just one more bite kind of magic.
So swirl it up, bake a batch, and get ready for cookie perfection.
