If you love the rich, fudgy goodness of brownies paired with the creamy, nutty delight of peanut butter, then the Peanut Butter Brownie Swirl Cookies Recipe will quickly become your new obsession. These cookies bring together the best of both worlds in one irresistible treat: the deep chocolate flavor swirled with luscious peanut butter, creating a chewy texture with just the right amount of sweet and salty balance. Whether you’re baking for a crowd or craving a comforting snack, this recipe hits all the right notes and is surprisingly simple to make!

Ingredients You’ll Need
Gathering the ingredients for this Peanut Butter Brownie Swirl Cookies Recipe is a breeze, and each one plays a crucial role in delivering that perfect blend of flavors and textures. From the dense richness of the brownie mix to the silkiness of peanut butter, every component is essential to create those melt-in-your-mouth cookies.
- Brownie mix (1 box, 18.5 oz): Provides a deep chocolate base and fudgy texture without extra fuss.
- Peanut butter (1/2 cup): Adds creamy nutty swirls and subtle saltiness to balance the sweetness.
- Butter, softened (1/2 cup): Enhances richness and ensures tender, chewy cookies.
- Granulated sugar (1/2 cup): Sweetens and contributes to the slight crispness on cookie edges.
- Brown sugar, packed (1/4 cup): Brings moisture and a chewy crumb with hint of caramel.
- Large egg (1): Binds the dough and adds structure for perfect cookie shapes.
- Vanilla extract (1 tsp): Lifts the flavors with a natural, sweet aroma.
- All-purpose flour (1 cup): Balances the wet ingredients and gives body to the dough.
- Baking soda (1/2 tsp): Helps the cookies rise slightly while maintaining chewiness.
- Salt (1/4 tsp): Accentuates the sweet and peanut butter flavors perfectly.
- Chocolate chips (1/2 cup, optional): For an extra burst of chocolate in every bite.
How to Make Peanut Butter Brownie Swirl Cookies Recipe
Step 1: Preheat and Prepare
Start by preheating your oven to 350°F (175°C). Line a baking sheet with parchment paper to keep your cookies from sticking and make cleanup a breeze. This simple first step sets the stage for baking success.
Step 2: Combine the Wet Ingredients
In a large mixing bowl, blend together the brownie mix, peanut butter, softened butter, granulated sugar, and brown sugar. Use a sturdy spoon or mixer until everything is well combined and smooth—this mixture is the flavorful base of the cookie dough.
Step 3: Add Egg, Vanilla, and Dry Ingredients
Next, stir in the egg and vanilla extract until incorporated. Then, gradually add the flour, baking soda, and salt to the bowl, mixing gently until a uniform cookie dough forms. This balance of wet and dry ingredients ensures your cookies will bake up chewy and delicious.
Step 4: Fold in the Chocolate Chips (Optional)
If you’re a chocolate lover craving an extra touch of decadence, fold in the chocolate chips now. They add delightful pockets of melted chocolate in every bite, but feel free to skip if you prefer simpler cookies.
Step 5: Portion and Bake
Drop rounded spoonfuls of dough onto your prepared baking sheet, spacing them about two inches apart to give them room to spread. Bake in the preheated oven for 8 to 10 minutes, or until the edges are set and the tops start showing those inviting, slight cracks.
Step 6: Cool and Enjoy
After baking, allow the cookies to cool on the baking sheet for 5 minutes. This rest time firms them up just enough before transferring to a wire rack to cool completely, preserving their chewy texture while making them easy to handle.
How to Serve Peanut Butter Brownie Swirl Cookies Recipe

Garnishes
For a little extra pizzazz, dust the cooled cookies lightly with powdered sugar or drizzle melted peanut butter or chocolate over the top. A sprinkle of flaky sea salt can also take these cookies to gourmet status by enhancing all the rich flavors.
Side Dishes
These cookies pair beautifully with a cold glass of milk or a cup of coffee or tea. For parties, serve alongside fresh fruit or a scoop of vanilla ice cream to complement their chewy, fudgy texture with contrast and freshness.
Creative Ways to Present
Stack them in a rustic wooden box tied with twine for gifting, or arrange them on a decorative platter with mini bowls of peanut butter and chocolate chips for a fun, interactive dessert station. You can even sandwich ice cream between two cookies for an unbeatable homemade treat.
Make Ahead and Storage
Storing Leftovers
Keep any leftover cookies fresh by storing them in an airtight container at room temperature. They should stay chewy and delicious for up to five days, perfect if you want to enjoy the Peanut Butter Brownie Swirl Cookies Recipe over several days.
Freezing
You can freeze the baked cookies by placing them in a single layer on a baking sheet to freeze first, then transfer them to a freezer bag or container. They’ll keep well for up to three months, so you can have these delightful cookies ready for any occasion.
Reheating
To bring out their fresh-baked softness, warm the cookies in the microwave for 15 seconds or pop them in a preheated oven at 300°F (150°C) for about 5 minutes. This gentle reheating brings that peanut butter and chocolate aroma back to life beautifully.
FAQs
Can I use chunky peanut butter instead of creamy?
Absolutely! Chunky peanut butter adds delightful little nut pieces in your cookies, giving extra texture alongside the creamy swirls. Both types work perfectly in this recipe.
Is it necessary to use a brownie mix, or can I make the base from scratch?
You can make the dough from scratch, but the brownie mix simplifies the process, ensuring consistently fudgy, chocolatey flavor with less effort. Feel free to experiment once you’re comfortable with the recipe.
Can I substitute the all-purpose flour with gluten-free flour?
Yes, you can substitute a gluten-free flour blend one-for-one. Just make sure the blend includes xanthan gum or another binder to keep the cookies from crumbling.
What if I want my cookies cakier rather than chewy?
Try slightly increasing the flour to 1 1/4 cups and baking a minute or two longer. This will give the cookies a cakier texture while still showcasing that peanut butter brownie swirl magic.
Are these cookies safe to make ahead for parties?
Definitely! They’re excellent for make-ahead baking, and storing them properly will keep them fresh and moist. You can even freeze the dough scoops and bake fresh cookies at the event.
Final Thoughts
If you’re searching for a treat that combines the lusciousness of brownies with the unforgettable flavor of peanut butter in a perfect cookie form, the Peanut Butter Brownie Swirl Cookies Recipe is exactly what you need. Easy to make, impressively delicious, and versatile, this recipe will surely become a favorite for your dessert rotation. Go ahead and bake a batch—you won’t regret sharing this warm, homemade delight with your loved ones!
Print
Peanut Butter Brownie Swirl Cookies Recipe
- Prep Time: 15 minutes
- Cook Time: 10 minutes
- Total Time: 25 minutes
- Yield: 18 servings
- Category: Dessert
- Method: Baking
- Cuisine: American
Description
Delight in these Peanut Butter Brownie Swirl Cookies, combining rich brownie mix flavors with creamy peanut butter for a perfectly chewy and decadent treat. With a golden edge and slightly cracked top, these cookies offer a delicious twist on classic brownies, enhanced by optional chocolate chips for extra indulgence.
Ingredients
Main Ingredients
- 1 box brownie mix (for a 9×9″ pan, 18.5 oz)
- 1/2 cup peanut butter (creamy or chunky)
- 1/2 cup butter (softened)
- 1/2 cup granulated sugar
- 1/4 cup packed brown sugar
- 1 large egg
- 1 tsp vanilla extract
- 1 cup all-purpose flour
- 1/2 tsp baking soda
- 1/4 tsp salt
- 1/2 cup chocolate chips (optional)
Instructions
- Preheat oven: Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper to prevent sticking and ensure even baking.
- Combine base ingredients: In a large bowl, mix together the brownie mix, peanut butter, softened butter, granulated sugar, and brown sugar until all ingredients are well combined into a smooth mixture.
- Add egg and vanilla: Incorporate the large egg and vanilla extract into the mixture, followed by stirring in the all-purpose flour, baking soda, and salt until a cohesive cookie dough forms.
- Form cookies: Drop rounded spoonfuls of the cookie dough onto the prepared baking sheet, spacing each about 2 inches apart to allow room for spreading during baking.
- Fold in chocolate chips: If using, gently fold the chocolate chips into the dough on the baking sheet or incorporate them during dough formation before dropping spoonfuls.
- Bake cookies: Place the baking sheet in the preheated oven and bake the cookies for 8-10 minutes, or until the edges are set and the tops show slight cracks indicating doneness.
- Cool cookies: Allow the cookies to cool on the baking sheet for 5 minutes to firm up, then transfer them to a wire rack to cool completely before serving.
Notes
- Use either creamy or chunky peanut butter depending on your textural preference.
- Do not overbake; cookies should be slightly soft in the center when removed from the oven to maintain chewiness.
- Optional chocolate chips add a delightful burst of chocolate but can be omitted or substituted with nuts.
- The dough may be slightly sticky; chilling it for 15-20 minutes before baking can help with handling.
- Store cooled cookies in an airtight container at room temperature for up to 5 days.

