Peanut Butter Chocolate Chip Cookie Bars

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Soft and chewy peanut butter chocolate chip cookie bars!

These cookie bars are made extra thick in a 9×9 pan and are loaded with creamy peanut butter and packed full of chocolate chips!

A batch of Peanut Butter Chocolate Chip Cookie Bars

Is there even a better flavor combination than chocolate and peanut butter?  I’m not sure that there is, and any recipe that combines these two flavors is a winner in my book.

So, it probably won’t surprise you that these peanut butter chocolate chip cookie bars are among my latest baking obsessions.  Recently I’ve been going through peanut butter like mad (fortunately I’d stocked up on jars over the holidays when I made dozens and dozens of peanut butter blossoms and a pan of peanut butter lasagna!), and the craze has continued as I’ve been making a batch of peanut butter chocolate chip cookie bars once a week.

Peanut Butter Chocolate Chip Cookie Bars with a bite taken and a platter full of bars

They’re soft and chewy, made with a dash of cornstarch and creamy peanut butter (I don’t recommend using natural peanut butter).  These cookie bars can be made with milk, semisweet, or dark chocolate chips (or even white chocolate chips, it just depends on your chocolate preferences, I always prefer semisweet chocolate).

While I love a great chocolate chip cookie, these peanut butter chocolate chip cookie bars might be even better, and not just because they add peanut butter into the mix.

Raw Peanut Butter Chocolate Chip Cookie Bars dough in a bowl being stirred

How to Make Peanut Butter Chocolate Chip Cookie Bars

Making the dough is as simple as making classic cookie dough, but the actual production requires half the effort because there’s no need to scoop the cookie dough into even-sized balls, wait to cook pan after pan of cookie dough, and repeat over and over until all of the cookie dough is gone.

Also, unlike with so many of my favorite cookie recipes, there’s absolutely no chilling required to make these cookie bars.  Just spread the batter into the pan and you’re good to go!

This recipe can be made in a 13×9 pan if you prefer, but I like to bake it in my smaller 9×9 pan instead for extra thick and chewy peanut butter chocolate chip cookie bars (like I said… big peanut butter & chocolate fan over here, so the bigger and fatter the squares the better!).

Keep in mind that if you do opt for the larger pan you will need to shave five minutes or so off of the cook time, as the thinner bars will bake much faster than their deep dish counterparts.

Peanut Butter Chocolate Chip Cookie Bars in a beautiful stack


and a platter full of bars
5 from 12 votes
Review Recipe


Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Servings 16 bars
Author Samantha
Course Dessert
Cuisine American
Soft and chewy peanut butter chocolate chip cookie bars! These cookie bars are made extra thick in a 9×9 pan and are loaded with creamy peanut butter and packed full of chocolate chips!


  • 1 cup unsalted butter softened to room temperature
  • 1 cup creamy peanut butter
  • 1 1/2 cups light brown sugar tightly packed
  • 1/2 cup sugar
  • 1 large egg + 1 large egg yolk
  • 2 teaspoons vanilla extract
  • cups all-purpose flour
  • 1 teaspoon cornstarch
  • 1/2 teaspoon baking powder
  • ¼ teaspoon salt
  • 2 Tablespoons milk
  • 2 cups chocolate chips semisweet or milk chocolate would work great

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  1. Preheat oven to 350F and line a 9×9 pan with parchment paper (or lightly grease and flour the pan).
  2. Using an electric mixer, cream together butter, peanut butter, and sugars until well combined.
  3. Add egg, egg yolk, and vanilla extract and stir well.
  4. In a separate bowl, whisk together flour, cornstarch, baking powder, and salt until well combined.
  5. Gradually add flour mixture to butter mixture until completely combined.
  6. Add milk and stir again until mixture is well incorporated.
  7. Fold in chocolate chips.
  8. Transfer batter to prepared 9×9 pan and use a spatula to spread it evenly into pan.
  9. Bake on 350F for 35 minutes or until edges are just beginning to turn golden brown and a toothpick inserted in the center comes out clean or with few moist crumbs.
  10. Allow to cool before cutting and serving.
Nutrition Information
Calories: 497, Fat: 25g, Saturated Fat: 12g, Cholesterol: 44mg, Sodium: 138mg, Potassium: 177mg, Carbohydrates: 61g, Fiber: 2g, Sugar: 42g, Protein: 7g, Vitamin A: 8.5%, Vitamin C: 0.2%, Calcium: 6.6%, Iron: 9.8%

(Nutrition information provided is an estimate and will vary based on cooking methods and brands of ingredients used.)

Keyword chocolate chip cookie bars

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Soft and chewy peanut butter chocolate chip cookie bars! These cookie bars are made extra thick in a 9x9 pan and are loaded with creamy peanut butter and packed full of chocolate chips! #cookies #peanutbuttercookies #chocolatechipcookies #easyrecipe #easydessert #spendwithpennies
Soft and chewy peanut butter chocolate chip cookie bars! These cookie bars are made extra thick in a 9x9 pan and are loaded with creamy peanut butter and packed full of chocolate chips! #cookies #peanutbuttercookies #chocolatechipcookies #easyrecipe #easydessert #spendwithpennies

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About the author


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Samantha is the creator behind the dessert blog “Sugar Spun Run”, a website she began as an excuse to appease her insatiable sweet tooth. Here she shares original, from-scratch desserts, usually of the chocolate variety. If she’s not in her kitchen (more likely than not coated in a fine dusting of powdered sugar), you’ll probably find her hanging out with her husband and their two dogs, Penny and (Princess) Leia.

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  1. This is a great flavor combination but I agree with other commenters – they really need to be made in a bigger pan! And believe me I have nothing against a thick chewy cookie bar – it’s just crazy overkill for a 9×9. I dumped the unbaked dough out into a 9×13 and that’s better, but if I try it again, I’ll try to just halve the recipe or look for a less fussy alternative, sorry to say.

  2. Is it one 1/2 cup of brown sugar or is it 1 and 1/2 cup? You only wrote 1/2 cup (regular) sugar so I’m thinking it’s 1 and 1/2 cups but since you didn’t pluralize the cup like you did for the 2 3/4 cups of flour I’m confused. I may be way over thinking this as well. Thanks for clarification. 

    1. It’s 1 and 1/2 cups. I’ve updated the cups to make it more clear! Thank you for asking Peg. Enjoy the bars!

  3. I made mine in a 13 X 9 metal pan because I wanted to have more pieces. They still came out nice and thick and are delicious!!  This is such an easy recipe…used part light and dark brown sugar only because I had to without running to the store for more light brown. They were perfect. This is an excellent recipe Holly!!  With my homemade peach pie and these for dessert, we’re going to have an awesome Fathers Day dinner!!  Many thanks!

    1. I have only made the recipe as written, so can’t say for sure, but it may make them slightly chewier. Let us know if you try it Ruth!

  4. I tried the recipe and a 9×9 inch pan is too small because the dough was too thick.  I had to bake
    for about 45 minutes for the dough to cook, which resulted in it being too brown on the top.  I would suggest a 13×9 inch pan so the dough will cook all the way through.  Also the recipe does not say whether a glass or aluminum pan should be used.  

    1. Belinda, they just need more time in the oven. It’s possible it may be the temperature of your oven, or if you used a glass dish, it will likely take longer to bake. You can bake these in a 9×13 pan if you don’t want them to be so thick. This should take around 25-28 minutes for them to fully bake.

  5. I tried this recipe and they didn’t turn out right. The dough was way too thick and they wouldn’t cook through either. Not sure if one of my ingredients was bad or old or what but I’ll have to try it again.

    1. I’m sorry to hear the recipe didn’t turn out for you. I can’t say for sure why. It’s been tested and has turned out for me, so I hope that next time it works for you Sarah.

  6. These pictures make me want to jump into my computer and take a big bite! I’m serious, a little veganizing and I would make these in a heartbeat.

  7. Like you, I love making cookie bars so I don’t have to chill the dough or form balls of dough! Cookie bars are truly the MVP. LOL Peanut butter totally belongs with chocolate. 

  8. Hooray – another way to get chocolat4e chips into peanut butter! Seriously, isn’t that one of the best combinations?

  9. I’m with you, chocolate and peanut butter are the best! This looks super easy to make, will definitely be giving this a go!

  10. These look like they would TOTALLY hit the spot right now! Love the tip for making them in a smaller pan for that extra thick, chewy bar texture!

  11. I so agree – peanut butter and chocolate together is a winner every time! Love a cookie bar too – no scooping, you get that treat faster! :)

  12. Peanut butter and chocolate is a match made in heaven! I LOVE how thick these bars are! So many bar recipes can be on the thin side, and these are just so gorgeous and impressive!

  13. Nope. There doesn’t need to be anything else invented after peanut butter and chocolate and these bars look amazing. I want to eat that bowl of cookie dough!

  14. These sound SOOOO decadent! But in all the right ways. I could SERIOUSLY eat a whole pan of these. #SorryNotSorry

  15. Oh my goodness these look amazing! I love a good cookie bar and it’s been forever since I’ve made any! Your recipe looks delish! Can’t wait to try these out!

  16. Okay, I could eat that whole pan! Peanut butter with chocolate is a weakness of mine. I’m not much of a baker but these look fairly easy for a non-baker like me. I will definitely be giving these a try!

  17. OMG Samantha! These sound and look absolutely fabulous! My daughters birthday is coming up and I bet she’d LOVE these! 

  18. Ummm…hello?  You’re my new best friend.  These are genius.  I love that they don’t require chilling before baking.  Sometimes when you have that PB and Chocolate need, you can’t wait for silly things like chilling.

  19. I love the sound of this so much. Peanut butter, chocolate chips and bars.. That’s all my favorites in one.. Sounds incredible.