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Peanut Butter Cookie Bars

These Peanut Butter Cookie Bars are sweet, soft, chewy and mega peanut buttery!

I made the most delicious peanut butter cookie bar recipe today.  The most delicious I tell you.  I seriously cannot stop eating these little bars of peanut butter deliciousness.  Peanut butter is one of my biggest weaknesses, and combine it with a cookie batter, I can’t stop.  Won’t stop.

Peanut Butter Cookie Bars {A Pretty Life}

These cookie bars are sweet, soft, and mega peanut buttery.  I under baked mine just a smidge, but I like cookies and bars soft and chewy, and under baking them makes them just perfect.  You need to make them.  Stat.

Peanut Butter Cookie Bars {A Pretty Life}

And can we just talk about this pan for a second?  Isn’t it a thing of beauty?  I’ve really grown an appreciation for, and a big love of vintage baking tins and pans.  I love the shape of them, the details in the metal, and the worn look they wear.  I want to know their stories.  Who baked in them?  What was baked in them?  Where did they come from?  I just love the mystery of them, so I find myself scouring thrift shops and antique stores for vintage tins like this one in the picture.  So pretty.

Anyway, shall we get back to these Peanut Butter Cookie Bars?  Yes, I think we should.



Peanut Butter Cookie Bars

These Peanut Butter Cookie Bars cookie bars are sweet, soft, chewy and mega peanut buttery!

  • Author: Jo-Anna Rooney
  • Prep Time: 10 minutes
  • Cook Time: 35 minutes
  • Total Time: 45 minutes
  • Yield: 36 medium bars 1x


  • 1/2 cup butter (at room temperature)
  • 3/4 cup peanut butter
  • 1/2 cup sugar
  • 1/2 cup packed brown sugar
  • 1 egg
  • 1 tsp vanilla
  • 1 cup flour
  • 1/2 cup quick-cooking oats
  • 1 tsp baking soda
  • 1/4 tsp salt
  • 1/2 cup peanut butter chips


  1. Preheat your oven to 350 degrees.
  2. Line a 9×9 square baking pan with parchment paper.
  3. In a bowl, cream together the butter, peanut butter, and sugars until light and fluffy.
  4. Beat in the egg and vanilla.
  5. In a separate bowl, whisk together the flour, oats, baking soda and salt.
  6. Add the flour mixture to the butter mixture and combine.
  7. Stir in the peanut butter chips.
  8. Spread the mixture into the baking pan, making sure it is smooth and level.
  9. Bake for 30 – 35 minutes, or until the centre looks set. See notes.
  10. Cool on a wire rack before cutting.


I wanted our bars to be slightly chewy, so they are a little under done. I baked mine for 30 minutes.

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Recipe slightly adapted from Taste of Home

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If you love peanut butter you might like these recipes too!

Anyway, I hope you enjoy this recipe…it’s definitely a keeper around here!

Have a delicious day!

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  1. Husband is a happy camper as I’m making this right now! Anything peanut butter is a win win:) Thank you for sharing your treasures Jo-Anna!

  2. Mmmmmm these look so yummy, the perfect little treat. I’d probably under bake mine as I love the chewy texture too. Thank you for sharing, I came across you on the motivate me monday link party : )

    Kathryn | Nimble Note

  3. I like my cookie bars to be chewy too, so thanks for saying to cook them for 30 minutes. A lot of cookies and other treats that have peanut butter tend to be hard, and I like softer treats.
    Visiting from All Things Thursday.

  4. I made these and the taste is amazing, but they just fell apart on me. I’m not sure what I did wrong. ?

  5. These were by far the best pb cookies I’ve ever had!!! Made exactly as the recipe instructed and they came out perfect! Thanks so much!!