Peanut Butter Chocolate Chip Cookie Bars

This post may contain affiliate links. Please read my disclosure policy.

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!

peanut butter cookie bars with chocolate chips

Chocolate & Peanut Butter: A Dynamic Duo

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.

Single peanut butter chocolate chip cookie bar with bite taken out

Tips & Recommendations

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.

peanut butter cookie bars dough in a bowl

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.

Stack of peanut butter cookie bars on a plate

More Amazing Bar Recipes

Single peanut butter chocolate chip cookie bar with bite taken out
4.85 from 59 votes
Review Recipe

Peanut Butter Chocolate Chip Cookie Bars

Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Servings 16 bars
Author Samantha
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 ½ cups light brown sugar tightly packed
  • ½ cup sugar
  • 1 large egg + 1 large egg yolk
  • 2 teaspoons vanilla extract
  • 2 ¾ cups all-purpose flour
  • 1 teaspoon cornstarch
  • ½ teaspoon baking powder
  • ¼ teaspoon salt
  • 2 tablespoons milk
  • 2 cups chocolate chips semisweet or milk chocolate would work great

Follow Spend with Pennies on Pinterest


  • Preheat oven to 350°F and line a 9×9 pan with parchment paper (or lightly grease and flour the pan).
  • Using an electric mixer, cream together butter, peanut butter, and sugars until well combined.
  • Add egg, egg yolk, and vanilla extract and stir well.
  • In a separate bowl, whisk together flour, cornstarch, baking powder, and salt until well combined.
  • Gradually add flour mixture to butter mixture until completely combined.
  • Add milk and stir again until mixture is well incorporated.
  • Fold in chocolate chips.
  • Transfer batter to prepared 9×9 pan and use a spatula to spread it evenly into pan.
  • 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.
  • Allow to cool before cutting and serving.

Nutrition Information

Calories: 497, Carbohydrates: 61g, Protein: 7g, Fat: 25g, Saturated Fat: 12g, Cholesterol: 44mg, Sodium: 138mg, Potassium: 177mg, Fiber: 2g, Sugar: 42g, Vitamin A: 425IU, Vitamin C: 0.2mg, Calcium: 66mg, Iron: 1.8mg

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

Course Dessert
Cuisine American

More Recipes You’ll Love

Peanut Butter Bars with writing
Peanut Butter Bars with a title
About the author


pinterest facebook twitter instagram

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.

More Posts by Samantha

Leave a Reply

Your email address will not be published.

Recipe Rating


  1. Just made these in a 9×13 pan for 30 minutes. They are perfect cookie bars. They won’t seem done in the middle, but as they cool they will firm up. I love that the edges have a tender crunch and the inside is soft. Great with a glass of milk or cup of coffee.5 stars

      1. Hi LuAnn, I would double the recipe for that size of pan. If not, they will be much thinner.

  2. These were awesome!!!!
    I did increase the baking time , about 12 extra minutes and put the dough into a 9×13 glass baking dish. I stuck a knife in, they looked raw, but the knife came out clean.
    I used chocolate chunks and chunky peanutbutter, 1
    1/2 cups . They were very rich .
    They reminded me of a friend’s peanut butter fudge, I had in my teens.
    My family lives far away and are always asking for baked goods. Because these are so moist and tender, I know they will ship well, and not dry up. I made these over 2 weeks ago, and have a few left, that are still moist. I wish I could upload a picture to share.
    Great recipe!!! Thanks for sharing it with everyone!!!