Brownie Peanut Butter Swirl

Featured in Foolproof Baking Recipes for Everyone.

Dive into these mouthwatering marbled cookies made by swirling fudgy brownie mix with creamy peanut butter dough. Each bite delivers chocolate and peanut butter perfection.

Updated on Sat, 22 Mar 2025 10:14:09 GMT
Two golden and chocolate swirled cookies sit on a white plate, showing off their soft and rich marbled centers. Pin it
Two golden and chocolate swirled cookies sit on a white plate, showing off their soft and rich marbled centers. | mellierecipes.com

I've always had a thing for mixing chocolate with peanut butter, which is why I came up with these mind-blowing Peanut Butter Brownie Swirl Cookies. When you blend fudgy brownie mix with smooth peanut butter dough, you get stunning marble patterns. Believe me, these cookies will have your taste buds jumping for excitement.

The Unique Charm of These Delightful Cookies

Let me share what happens when chocolatey brownie mix meets creamy peanut butter cookie dough. Every bite takes you through waves of different tastes. The mix of deep chocolate and nutty peanut butter makes something truly amazing. I always smile seeing people's reactions to those beautiful swirls.

Essential Ingredients You'll Need

  • Cocoa Powder: Don't skimp here. Get dark cocoa for that deep chocolate kick we all want.
  • Peanut Butter: Stick with smooth regular peanut butter. It swirls way better than chunky versions.
  • Chocolate Chips: They add extra gooeyness to the brownie sections.
  • Butter: Set it out ahead of time. Soft, room temp butter isn't optional for good texture.
  • Eggs: They hold everything together nicely.
  • Flour: Standard all purpose does the job. I've also tried some gluten free options.
  • Sugar: Using both white and brown creates just the right sweetness level.

Beginning with the Rich Brownie Mix

Get your mixer ready and blend the butter with sugar until it's airy and light. Then add your eggs and vanilla. This is always fun to watch come together. Now sift the cocoa powder and flour with a small dash of salt. Gently add those chocolate chips at the end. Your mix should look thick but still be easy to drop onto a pan.

Whipping Up the Peanut Butter Component

In a separate bowl mix your butter peanut butter and sugar. Keep mixing till it looks smooth and fluffy. Add the eggs and vanilla then stir in your flour baking powder and salt. You want dough that feels soft but won't stick when you touch it with your fingers.

A close-up of two swirled chocolate chip cookies on a white plate, featuring a rich chocolate filling. Pin it
A close-up of two swirled chocolate chip cookies on a white plate, featuring a rich chocolate filling. | mellierecipes.com

Mastering the Swirl Technique

This part's my favorite. Put spoonfuls of both mixes side by side on your cookie sheet. Let them touch a little bit. Then grab a toothpick and make pretty swirls by gently dragging through both doughs. Stop once you see nice patterns. If you swirl too much, they'll just blend completely.

Tips for Baking Them Perfectly

Heat your oven to 350°F and watch them transform. They usually need around 10 to 12 minutes. You want slightly cracked tops with soft middles. The edges should just barely look done. Let them sit on the hot pan for 5 minutes before moving them to cool down.

Adjustments for Different Dietary Needs

  • Gluten Free: My friends with celiac disease enjoy these with their preferred gluten free flour blend.
  • Dairy Free: You can swap in plant based butter with great results.
  • Vegan: These work with egg substitutes and dairy free butter.
  • Sugar Free: Try using coconut sugar for a nice caramel flavor.

Storage Solutions

Store these treats in a sealed container and they'll stay good for 3 days at room temp. Want them to last longer? Keep them in your fridge for a week or throw them in the freezer for up to 3 months. Just let them warm up before you eat them.

Do-Ahead Options

I often make both doughs the evening before and store them in the fridge. Just remember they need to warm up a bit before shaping. When the dough is too cold, it won't swirl properly.

A close-up of two swirled chocolate chip cookies on a white plate, showcasing a rich chocolate layer on top. Pin it
A close-up of two swirled chocolate chip cookies on a white plate, showcasing a rich chocolate layer on top. | mellierecipes.com

Tasty Serving Ideas

These cookies taste so good while they're still warm. The centers stay soft and melty. Grab a cold glass of milk pour a hot coffee or add a scoop of vanilla ice cream on top for the ultimate dessert experience.

Presentation Tricks

When I bring these to gatherings I place them swirl side up on my best serving dish. Sometimes I add a light powdered sugar dusting or some drizzled chocolate on top. People always want photos before they even take a bite.

Solutions to Common Issues

  • Cookies Spreading: Chill your dough in the fridge for 30 minutes beforehand.
  • Messy Swirls: Use the same amount of each dough and swirl lightly.
  • Too Dry: Pull them out when the middle looks a little underbaked.

Creative Variations to Try

  • Extra Crunch: Add some chopped peanuts to the peanut butter mixture.
  • Chocolate Heaven: Combine both dark and white chocolate chips.
  • Warm Spices: A bit of cinnamon in the peanut butter dough tastes wonderful.

Achieving Beautiful Marble Effects

Your dough needs to be just right for good swirls. It should be thick but still workable. Don't press too hard when swirling. I always use my cookie scoop so I get even portions that cook the same every time.

A close-up of richly swirled chocolate and buttery cookie rolls on a white plate, with a few extra cookies in the background. Pin it
A close-up of richly swirled chocolate and buttery cookie rolls on a white plate, with a few extra cookies in the background. | mellierecipes.com

Healthy Aspects Worth Noting

Sure these are definitely treats but they've got some good stuff too. The peanut butter gives you protein and dark chocolate has antioxidants. That's what I tell myself when I grab another cookie anyway.

Ideal Occasions for Baking

I make these for every party and bake sale. They're always the first gone from any dessert table. Those swirls just pull people in like magic. They also travel really well without falling apart.

Storing in the Freezer

Shape your dough balls freeze them on a tray then dump them in a freezer bag. They stay good frozen for 3 months. Just bake them a minute or two longer from frozen. You can have fresh cookies whenever you want.

Equipment You'll Want

  • Mixing Bowls: You'll need two large ones for the separate doughs.
  • Cookie Scoop: Makes measuring each cookie so much easier.
  • Toothpick: The key tool for creating those lovely swirls.
  • Baking Sheet: Any flat nonstick tray will work fine.

My Personal Connection to This Sweet Treat

These cookies combine everything wonderful about brownies and peanut butter treats. The swirly patterns look fancy though they're actually pretty easy to make. Whenever I bake a batch they remind me exactly why I started loving baking in the first place.

Frequently Asked Questions

→ What’s the purpose of chilling cookie dough?

Chilling stops the dough from spreading too much in the oven and helps make the flavors stronger while ensuring the dough is easy to shape.

→ Is it possible to prep these cookies in advance?

Of course! Prepare both doughs and refrigerate them for up to 24 hours, or freeze the finished cookies in airtight containers for 3 months.

→ How do I check if the cookies are done baking?

Look for slightly set edges and crackly tops while the centers remain soft. They’ll firm up while cooling on the tray.

→ Can extra texture be added with crunchy peanut butter?

Absolutely! Crunchy peanut butter works fine if you want added texture, but creamy gives a smoother cookie.

→ What’s the trick to an awesome swirl effect?

A toothpick or skewer is perfect for gently mixing the doughs. Swirl lightly to blend without overdoing it, keeping the flavors distinct.

Brownie Peanut Butter Swirl

A delicious swirl of fudgy brownie and creamy peanut butter dough, baked into a soft and chewy cookie with crisp outer edges.

Prep Time
30 Minutes
Cook Time
10 Minutes
Total Time
40 Minutes

Category: Simple Baking

Difficulty: Intermediate

Cuisine: American

Yield: 12 Servings (12 cookies)

Dietary: Vegetarian

Ingredients

01 1/2 cup smooth peanut butter.
02 3/4 cup butter, split (1/2 cup melted for brownie mix, 1/4 cup softened for peanut butter mix).
03 1/2 cup packed brown sugar.
04 1 cup granulated sugar.
05 2 big eggs (separated).
06 2 teaspoons vanilla (split).
07 1 3/4 cups all-purpose flour (split).
08 1/2 teaspoon baking soda.
09 1/4 teaspoon baking powder.
10 1/2 teaspoon salt (split).
11 1/3 cup unsweetened cocoa powder.
12 1/2 cup semisweet chocolate chips.

Instructions

Step 01

Cream together peanut butter, soft butter, and brown sugar until fluffy. Stir in egg and some vanilla. Add a combo of flour, salt, and baking soda last.

Step 02

Mix melted butter and sugar until smooth, then stir in cocoa powder. Add an egg, a splash of vanilla, and blend in flour, baking powder, salt, and chocolate chips at the end.

Step 03

Pop both doughs into the fridge and let them firm up for half an hour.

Step 04

Scoop a little of each dough onto a lined baking sheet, side by side. Give them a gentle swirl together, using a toothpick.

Step 05

Bake in a 350°F oven for about 9-11 minutes. Edges should harden up, but centers stay soft.

Step 06

Leave the cookies on the tray for 5-10 minutes before moving them over to cool completely on a rack.

Notes

  1. Centers should stay a bit gooey.
  2. Don’t mix too much when swirling doughs.
  3. Dough can chill in the fridge overnight.

Tools You'll Need

  • Cookie sheets.
  • Nonstick parchment.
  • Hand or stand mixer.

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Peanuts.
  • Eggs.
  • Wheat.

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 350
  • Total Fat: 18 g
  • Total Carbohydrate: 45 g
  • Protein: 6 g