If you adore the perfect marriage of rich chocolate and creamy peanut butter in your treats, this Peanut Butter Brownie Swirl Cookies Recipe is about to become your new favorite obsession. Imagine soft, fudgy brownie-inspired cookies swirled generously with peanut butter, delivering a heavenly chewy texture and that unmistakable nutty aroma in every bite. These cookies blend the indulgence of brownies with the irresistible comfort of peanut butter cookies, making them the ultimate sweet snack you’ll want to bake again and again.

Ingredients You’ll Need
These ingredients are wonderfully straightforward yet essential to capturing the unique flavor and texture of the Peanut Butter Brownie Swirl Cookies Recipe. Each component plays a crucial role, from the boxed brownie mix that delivers fudgy depth to the peanut butter adding richness and character.
- Box brownie mix (18.5 oz): This is the foundation, providing that classic fudgy chocolate taste and moist texture.
- Peanut butter (1/2 cup): Use creamy or chunky depending on your preference; it adds a lush, nutty swirl that contrasts beautifully.
- Butter, softened (1/2 cup): Adds richness and helps achieve the perfect chewy crumb in the cookies.
- Granulated sugar (1/2 cup): Balances sweetness and enhances the cookie’s crisp edges.
- Brown sugar, packed (1/4 cup): Brings depth of flavor and moisture for that tender bite.
- Egg (1 large): Acts as a binder, holding everything together with a slight fluffiness.
- Vanilla extract (1 tsp): Adds a warm, inviting aroma that complements both chocolate and peanut butter.
- All-purpose flour (1 cup): Provides structure so the cookies hold their shape while staying soft.
- Baking soda (1/2 tsp): Leavens the dough just enough for a light texture without losing fudginess.
- Salt (1/4 tsp): Enhances overall flavor, balancing the sweetness beautifully.
- Chocolate chips (1/2 cup, optional): For extra bursts of chocolaty goodness 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; this simple step ensures your cookies won’t stick and makes cleanup a breeze. Getting the oven ready upfront sets you up for a smooth baking session.
Step 2: Mix the Brownie Base and Peanut Butter
In a large bowl, combine the boxed brownie mix, peanut butter, softened butter, granulated sugar, and brown sugar. The creamy peanut butter blends into the fudgy brownie mix, creating a luscious dough that’s part brownie, part cookie, and completely irresistible.
Step 3: Add Egg, Vanilla, and Dry Ingredients
Next, crack in the egg and pour in the vanilla extract; these add moisture and flavor depth. Then stir in the flour, baking soda, and salt until a dough forms. This step is crucial for achieving the perfect balance between chewy and tender.
Step 4: Incorporate Chocolate Chips (Optional)
If you love an extra hit of chocolate, gently fold in those chocolate chips now. They melt slightly during baking, creating little pockets of gooey delight throughout each cookie.
Step 5: Scoop and Bake
Drop rounded spoonfuls of dough onto your prepared baking sheet, spacing them about 2 inches apart so they have room to spread. Pop them in the oven and bake for 8 to 10 minutes. You’ll know they’re ready when the edges are set and tops show those irresistible slight cracks.
Step 6: Cool and Enjoy
Allow your cookies to cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely. This resting time lets them firm up just right, giving you that dream-soft texture with a satisfyingly crisp edge.
How to Serve Peanut Butter Brownie Swirl Cookies Recipe

Garnishes
Sprinkle a few sea salt flakes over the cookies right after baking to amplify the peanut butter’s natural richness and deepen the chocolate’s flavor. For a festive touch, try drizzling melted white chocolate or peanut butter over the tops for extra flair and indulgence.
Side Dishes
Pair these decadent cookies with a cold glass of milk or a warm cup of coffee or tea — they complement each other beautifully. For a real treat, serve with vanilla ice cream for a dessert that feels like a little celebration in every bite.
Creative Ways to Present
Arrange the Peanut Butter Brownie Swirl Cookies Recipe on a beautiful platter with fresh berries or chopped nuts scattered around. You could also sandwich softened peanut butter or chocolate ganache between two cookies for a dreamy homemade cookie sandwich. Presentation can make the experience feel even more special.
Make Ahead and Storage
Storing Leftovers
Store leftover cookies in an airtight container at room temperature for up to five days to keep them soft and chewy. If your kitchen is warm, storing them in a cool, dry place helps maintain their delightful texture without becoming too sticky or dry.
Freezing
These cookies freeze beautifully. Simply place them in a single layer on a baking sheet to freeze first, then transfer to a freezer-safe container or bag. They’ll keep for up to three months, making it super easy to enjoy Peanut Butter Brownie Swirl Cookies Recipe anytime you want a quick indulgence.
Reheating
To revive the fresh-baked experience, warm your cookies for about 10-15 seconds in the microwave. This gentle heat softens the peanut butter swirl and melts the chocolate chips slightly, bringing back all that gooey, dreamy goodness in an instant.
FAQs
Can I use homemade brownie batter instead of boxed mix?
Absolutely! While the boxed mix keeps this recipe simple and foolproof, homemade brownie batter can add a personalized touch and deeper chocolate flavor. Just ensure it’s thick enough to combine well with the other ingredients.
What type of peanut butter works best in this recipe?
Both creamy and chunky peanut butter work wonderfully here. Creamy peanut butter gives a smoother texture, while chunky adds delightful bits of nuts for extra crunch. Choose based on your texture preference.
Can I substitute the butter with a dairy-free option?
Yes, you can replace butter with a plant-based margarine or coconut oil to make these cookies dairy-free. Keep in mind coconut oil may add a subtle coconut flavor and slightly alter texture.
Why are my cookies spreading too much?
If your cookies are too flat, try chilling the dough for 30 minutes before baking. Also, measuring flour accurately and avoiding overly soft butter helps maintain the perfect thickness.
Is it okay to omit the chocolate chips?
Definitely! The chocolate chips add extra chocolaty bursts, but the cookies are delicious on their own with the rich peanut butter and brownie mix. Feel free to skip or add other mix-ins like chopped nuts or butterscotch chips.
Final Thoughts
If you’re craving a cookie that’s bursting with chocolate and peanut butter goodness, don’t wait to try this Peanut Butter Brownie Swirl Cookies Recipe. It’s such a joyful, rewarding bake — easy to make yet offering incredible flavor and texture that will delight everyone lucky enough to taste one. So grab your ingredients, preheat that oven, and get ready to savor the magic of these wonderfully indulgent cookies!
Print
Peanut Butter Brownie Swirl Cookies Recipe
- Prep Time: 10 minutes
- Cook Time: 10 minutes
- Total Time: 20 minutes
- Yield: 18 servings
- Category: Dessert
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Description
These Peanut Butter Brownie Swirl Cookies combine the rich, fudgy flavor of brownie mix with the creamy, nutty taste of peanut butter. Soft and chewy with a slight crunch on the edges, these cookies are perfect for peanut butter lovers looking for a quick and delicious treat. The addition of optional chocolate chips adds an extra layer of chocolatey goodness to each bite.
Ingredients
Dry Ingredients
- 1 box brownie mix (for a 9×9″ pan, 18.5 oz)
- 1 cup all-purpose flour
- 1/2 tsp baking soda
- 1/4 tsp salt
Wet Ingredients
- 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
Optional
- 1/2 cup chocolate chips (optional)
Instructions
- Preheat the oven: Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper to prevent the cookies from sticking.
- Mix base ingredients: In a large bowl, combine the brownie mix, peanut butter, softened butter, granulated sugar, and brown sugar. Stir these ingredients together until they are fully blended and form a consistent mixture.
- Add eggs and dry ingredients: Crack in the large egg and add vanilla extract, then gradually stir in the flour, baking soda, and salt until a cohesive cookie dough forms.
- Shape cookies: Using a spoon, drop rounded spoonfuls of the dough onto the prepared baking sheet, spacing each about 2 inches apart to allow room for spreading.
- Add chocolate chips: If you choose to use chocolate chips, gently fold them into the dough before scooping out the cookies to evenly distribute them.
- Bake: Place the baking sheet in the oven and bake for 8-10 minutes, or until the edges are set and the tops show slight cracks, indicating doneness.
- Cool: 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
- Peanut butter can be creamy or chunky based on preference.
- Chocolate chips are optional but add extra chocolate flavor.
- Do not overbake to keep cookies soft and chewy.
- Cookies can be stored in an airtight container for up to 5 days.
- For a gluten-free option, use a gluten-free brownie mix and gluten-free flour.

