If you’re a peanut butter lover like me, you’ll absolutely go crazy for this Nutter Butter Cookie Bars Recipe. Imagine your favorite Nutter Butter cookies baked right into a soft, chewy bar that’s packed with peanut butter chips and that irresistible nutty flavor. I made these for a casual weekend get-together, and let me tell you, they disappeared fast — perfect for when you want a sweet treat that satisfies serious cravings without any fuss.

What makes this Nutter Butter Cookie Bars Recipe so special is how it blends buttery brown sugar goodness with the crunchy surprise of chopped cookies inside, along with whole cookie halves nestled right on top for that fun, textured touch. Whether it’s for a potluck, a kid’s lunchbox, or just a cozy night in, these bars have become my go-to peanut butter fix that always impresses.

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Why You’ll Love This Recipe

  • Simple Ingredients: Uses pantry staples with a peanut butter twist for a quick, crowd-pleasing dessert.
  • Textural Delight: Combines smooth batter with crunchy cookie chunks and whole cookies on top for irresistible layers.
  • Perfect for Sharing: Makes about 15 bars — ideal for parties, school events, or just treating your loved ones.
  • Failsafe Baking: The batter is forgiving, so even if you’re not a baking pro, you’ll get great results every time.

Ingredients You’ll Need

Each ingredient plays a special role in making these Nutter Butter Cookie Bars Recipe come out perfectly balanced between rich, sweet, and peanutty. Choosing good-quality peanut butter and real Nutter Butter cookies truly elevates the flavor.

  • Cooking spray: Prepping your pan properly prevents sticking and helps the bars come out cleanly.
  • Light brown sugar: Adds moisture and that deep caramel note that pairs beautifully with peanut butter.
  • Unsalted butter: You’ll want it melted for easy mixing and buttery richness without extra salt.
  • Chunky peanut butter: I use natural chunky for texture and authentic flavor, but creamy works too.
  • Pure vanilla extract: Enhances all the flavors without overpowering the peanut butter.
  • Kosher salt: Just a pinch balances the sweetness and brings out the nutty tones.
  • Large eggs: Room temperature eggs help the batter emulsify smoothly.
  • Baking powder: Provides just a little lift so the bars aren’t too dense.
  • All-purpose flour: The base that gives these bars their structure without heaviness.
  • Nutter Butter cookies: Coarsely chopped for inside the bars and whole cookies for the top – trust me, don’t skip that step!
  • Peanut butter chips: Divided so some go into the batter and some sprinkle on top for melty pockets of peanut buttery goodness.
Note: You’ll find the complete list of ingredients, along with their exact measurements, in the printable recipe card at the bottom of this post.

Variations

I love making the Nutter Butter Cookie Bars Recipe my own, and you can too! Once you get the hang of the classic, try swapping out chips or adding extras to surprise your family and friends.

  • Chocolate Lovers’ Delight: I once swapped half the peanut butter chips for semi-sweet chocolate chips and got rave reviews from my chocoholic nephew.
  • Crunchier Texture: Toss in chopped roasted peanuts for an extra nutty crunch some afternoons when I want a little more bite.
  • Gluten-Free Swap: Using a 1-to-1 gluten-free flour blend works beautifully — just make sure your baking powder is gluten-free too.
  • Reduced Sugar: I sometimes cut back on brown sugar by about 1/4 cup when I want a slightly less sweet version that still tastes amazing.

How to Make Nutter Butter Cookie Bars Recipe

Step 1: Prep Your Pan Like a Pro

Start by preheating your oven to 350°F (175°C). I always grease a 13″ x 9″ metal baking pan with cooking spray and line it with parchment paper, leaving an overhang on the long sides. Don’t forget to spray the parchment itself — this step makes lifting the bars out a breeze and ensures nothing sticks, so your cuts are clean and perfect.

Step 2: Whip Together the Peanut Butter Batter

In a large bowl, use a handheld mixer on medium-high speed to beat together brown sugar, melted butter, peanut butter, vanilla extract, and salt. This combination gets creamy and fragrant, setting the stage for those rich bars. Then, add your eggs one at a time, mixing on low speed after each to keep the batter smooth — speed matters here to avoid adding extra air.

Step 3: Fold in Dry Ingredients and Those Beloved Cookies

Now, toss in your baking powder, beating a bit until everything melds. Turn off the mixer and gently fold the all-purpose flour into the batter with a flexible spatula until only a few streaks remain. This keeps the bars tender, so don’t overmix! Next, fold in the chopped Nutter Butter cookies and two-thirds of your peanut butter chips — this surprise nugget of cookie inside is what takes these bars over the top.

Step 4: Spread, Top, and Sprinkle

Scoop the batter into your prepared pan and spread it evenly with an offset spatula or the back of a spoon. Now here’s the fun part: twist apart your remaining whole Nutter Butter cookies and press the halves peanut side up into the top of the batter. Finally, sprinkle the rest of your peanut butter chips on top — this gives a beautiful golden finish with bursts of melty peanut butter flavor.

Step 5: Bake Until Golden Perfection

Bake your bars for 23 to 27 minutes, until lightly golden and a toothpick inserted in the center comes out clean. I’ve learned that ovens vary, so start checking at 23 minutes. Remember, the bars will firm up as they cool, so it’s okay if they seem slightly soft when you take them out.

Step 6: Cool, Lift, and Slice

Let the bars cool completely in the pan. Thanks to the parchment overhang, lifting them out is easy — transfer to a cutting board and slice into roughly 15 squares. I love how clean the cuts come out, and the whole cookies on top make each bite fun and unique.

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Pro Tips for Making Nutter Butter Cookie Bars Recipe

  • Use Room Temperature Eggs: This helps create a smooth, even batter that bakes evenly without cracking.
  • Don’t Overmix the Flour: It’s tempting, but a few streaks of flour are fine and keep the bars tender.
  • Distribute Cookie Pieces Evenly: Folding cookies throughout means every bite surprises you with crunchy goodness.
  • Watch Your Bake Time: Remove bars as soon as a toothpick comes out clean to avoid drying them out — they’re best soft and chewy.

How to Serve Nutter Butter Cookie Bars Recipe

A stack of three thick peanut butter blondies with a crumbly, slightly dense texture is shown on white parchment. Each blondie has a light golden-brown color with embedded pieces of peanut butter cups and a whole peanut butter cup pressed on top, showing the grid pattern and rounded edges. A woman's hand is holding the top blondie, lifting it gently from the stack, revealing the textured layers and small cracks on the sides. The background is a soft white marbled surface, keeping the focus on the blondies. photo taken with an iphone --ar 4:5 --v 7

Garnishes

I like a simple dusting of powdered sugar to add a little sweetness and make the bars look extra inviting, but sometimes I drizzle a bit of melted chocolate over the top when I’m feeling fancy. Chopped peanuts sprinkled on top add crunch and a little visual pop, perfect for serving at parties.

Side Dishes

These bars pair beautifully with a cold glass of milk (classic, right?). For coffee lovers, I serve them alongside a rich cappuccino or even a scoop of vanilla ice cream to turn them into a dessert experience.

Creative Ways to Present

For birthdays or casual gatherings, I like to cut the bars into bite-sized squares and stack them pyramid-style on a pretty platter. Wrapping individual bars in parchment and tying with twine makes for cute, portable treats when you’re taking them to a party or potluck.

Make Ahead and Storage

Storing Leftovers

I store leftover bars in an airtight container at room temperature for up to 4 days — they stay delightfully soft. If your kitchen is warm, I pop them in the fridge, though they may firm up slightly and benefit from a quick zap in the microwave before eating.

Freezing

These bars freeze like a charm! I wrap them individually in plastic wrap and place them in a freezer-safe container. When thawed overnight in the fridge, they practically taste fresh-baked, which is perfect for making ahead for parties or gifts.

Reheating

To revive that fresh-baked feel, I warm bars in the microwave for about 15 seconds or pop them in a 300°F oven for 5 minutes. This melts the peanut butter chips just right and brings back that soft, chewy texture everyone loves.

FAQs

  1. Can I use creamy peanut butter instead of chunky for this Nutter Butter Cookie Bars Recipe?

    Absolutely! Using creamy peanut butter will give you a smoother texture inside the bars. However, the recipe already includes crunchy cookie chunks and chips to provide texture, so creamy peanut butter works just fine if that’s what you have on hand.

  2. What’s the best way to store leftover bars?

    Store any leftovers in an airtight container at room temperature for up to 4 days. If your kitchen is warm, refrigeration works well, but the bars might firm up slightly. A short microwave zap will bring them back to soft and chewy.

  3. Can I freeze the bars for later?

    Yes, you can! Freeze bars individually wrapped in plastic and stored in an airtight container. When ready to eat, thaw overnight in the fridge for the best texture.

  4. How important is it to use the whole Nutter Butter cookies on top?

    While not mandatory, those whole cookie halves on top add a delightful visual appeal and extra peanut butter crunch that make these bars really stand out. I highly recommend it for that iconic look and texture.

  5. Can I substitute peanut butter chips with chocolate chips?

    You can! Chocolate chips add a lovely contrast to the peanut butter flavor. Mixing half peanut butter chips and half chocolate chips is a delicious option I often try to satisfy both peanut butter and chocolate lovers.

Final Thoughts

I absolutely love how this Nutter Butter Cookie Bars Recipe turns out every time—I think it’s that perfect peanut butter sweetness with cookie crunch that gets everyone smiling. If you make these bars, you’ll enjoy how easy they are to whip up and how quickly they disappear. Trust me, once you try this recipe, it’ll become your trusty go-to for a quick, nostalgic, and totally scrumptious treat to share or savor solo.

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Nutter Butter Cookie Bars Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 5 from 141 reviews
  • Author: Harper
  • Prep Time: 10 mins
  • Cook Time: 27 mins
  • Total Time: 37 mins
  • Yield: 15 bars
  • Category: Dessert
  • Method: Baking
  • Cuisine: American

Description

Delight in the rich, peanut buttery goodness of these Nutter Butter Cookie Bars. Combining the classic flavors of peanut butter and brown sugar with chunks of Nutter Butter cookies and creamy peanut butter chips, these bars offer a perfect balance of chewy and crunchy textures. Ideal for a sweet treat or dessert, they are easy to prepare and bake to a golden perfection.


Ingredients

Dry Ingredients

  • 3/4 tsp kosher salt
  • 1 tsp baking powder
  • 2 cups (240 g) all-purpose flour
  • 8 Nutter Butter cookies (about 4 oz), coarsely chopped
  • 5 whole Nutter Butter cookies, divided
  • 1 cup peanut butter chips (about 6 oz), divided

Wet Ingredients

  • 1 3/4 cups (350 g) packed light brown sugar
  • 3/4 cup (1 1/2 sticks) unsalted butter, melted
  • 3/4 cup (180 g) all-natural chunky peanut butter
  • 1 tsp pure vanilla extract
  • 3 large eggs, room temperature

Other

  • Cooking spray


Instructions

  1. Preheat and prepare pan: Preheat your oven to 350°F (175°C). Grease a 13″ x 9″ metal baking pan with cooking spray and line it with parchment paper, leaving an overhang on two long opposite sides. Grease the parchment as well to prevent sticking.
  2. Mix wet ingredients: In a large bowl, use a handheld mixer on medium-high speed to beat together the brown sugar, melted butter, chunky peanut butter, vanilla extract, and kosher salt until fully combined and smooth.
  3. Add eggs and baking powder: Add the eggs one at a time, beating on low speed after each addition to incorporate them fully. Then add the baking powder and beat until well blended.
  4. Fold in dry ingredients: Using a flexible rubber spatula, gently fold the all-purpose flour into the batter until just a few streaks of flour remain. Fold in the coarsely chopped Nutter Butter cookies and two-thirds (2/3 cup) of the peanut butter chips evenly into the batter.
  5. Transfer batter to pan: Scoop the batter into your prepared baking pan, spreading it evenly with an offset spatula or the back of a spoon for a smooth surface.
  6. Add cookie halves and chips on top: Twist the remaining five whole Nutter Butter cookies apart. Press the separated halves, ridged peanut butter side facing up, evenly into the top of the batter. Sprinkle the remaining one-third (1/3 cup) of peanut butter chips over the top.
  7. Bake: Bake the blondies in the preheated oven for 23 to 27 minutes, or until they are light golden brown and a tester inserted into the center comes out clean without wet batter.
  8. Cool and cut: Allow the blondies to cool completely in the pan. Once cooled, use the parchment paper overhang to lift the bars out of the pan and transfer them to a cutting board. Cut into approximately 15 squares for serving.

Notes

  • Ensure eggs are at room temperature for better incorporation into the batter.
  • Use parchment paper with overhang to easily remove the bars without breaking.
  • Do not overmix the batter after adding flour to avoid tough bars.
  • Check baking time closely between 23-27 minutes; do not overbake to maintain chewy texture.
  • Store bars in an airtight container at room temperature for up to 3 days or refrigerate for longer freshness.

Nutrition

  • Serving Size: 1 bar
  • Calories: 320
  • Sugar: 22g
  • Sodium: 150mg
  • Fat: 18g
  • Saturated Fat: 5g
  • Unsaturated Fat: 11g
  • Trans Fat: 0g
  • Carbohydrates: 35g
  • Fiber: 2g
  • Protein: 6g
  • Cholesterol: 55mg

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