Peanut Butter Cookie Bars

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A thick peanut butter cookie bar, just like your favorite thick and chewy peanut butter cookie, but only in easy cookie bar form.

peanut butter cookie bars

Where are my peanut butter lover’s? Today’s recipe is for you. We all love a good peanut butter cookie (In fact, I have the best peanut butter cookie recipe on the planet on my blog.) And today I’m showing you how to make them in bar form.

My oven is super small and making cookies can be a pain since I can only bake 8 cookies at a time. And I’m sure some of you don’t always have the time to make sheet after sheet of peanut butter cookies, so this is basically peanut butter cookie dough, baked in a 9×13 inch pan.

thick and chewy peanut butter cookie bars

And there are no dry, crunchy peanut butter cookies allowed on my watch, and baking them in pan ensure they will be thick and chewy (and slightly doughy if that’s your thing) I like to under-bake mine just a bit.

I can’t express enough how easy this recipe is, dangerously easy. And it only requires pantry staples, so you basically always have everything you need on hand to make them.

peanut butter cookie bars on parchment paper

That makes this recipe perfect for when you need a last minute treat to take somewhere or just have a late night baking craving.

Cream together the butter, peanut butter and sugar, add eggs and vanilla, stir in dry ingredients, bake and ta-da! Peanut butter cookie bars. It’s that easy.

We like to enjoy our peanut butter cookies around here in many different ways. Never can have too much peanut butter.

We also like these no bake peanut butter cookies, a good peanut butter chocolate chip cookie and for times when you’re feeling extra, these peanut butter balls are amazing on their own or on these Buckeye Brownie Bites.

thick and chewy peanut butter cookie bars

And if you take your peanut butter cookies as serious as we do, you also need to check out this peanut butter cookie dessert from I Am Baker. It takes ordinary peanut butter cookies and turns them into a fancy dessert worthy of Christmas dinner.

If you make this recipe, let me know how you liked it. Leave me a comment below or give it a rating in the recipe card. Happy Baking!

peanut butter cookie bars

Peanut Butter Cookie Bars

5 from 1 vote
A thick peanut butter cookie bar, just like your favorite thick and chewy peanut butter cookie, but only in easy cookie bar form.
Prep Time: 15 mins
Cook Time: 20 mins
Additional Time: 25 mins
Total Time: 1 hr
Servings: 24 bars


  • 2/3 cup butter softened
  • 3/4 cup peanut butter I use Jif Creamy
  • 1/2 cup brown sugar
  • 1 1/4 cup white sugar
  • 3 eggs
  • 1 teaspoon vanilla
  • 2 cups all purpose flour
  • 1/2 teaspoon salt
  • 1 1/2 teaspoons baking powder


  • Preheat oven to 350° F. Grease a 9 x 13 inch baking pan and set aside. In a large bowl, cream together the butter, peanut butter, brown sugar, and white sugar until smooth. Beat in the eggs and vanilla.
  • In a separate bowl, whisk together the flour, salt and baking powder. Add the dry ingredients to the wet and stir until well combined.
  • Spread the batter in the 9×13 baking pan. Bake for about 20 minutes or until just set. But DO NOT overbake. They will firm up as the cool. Let cool before cutting into bars.
  • But honestly, I like them warm and gooey, but the don't hold their shape well if you cut before they have cooled.
  • Store tightly covered on the counter for a day or two or freeze for up to a few weeks.


If you make this recipe, let me know how you liked it. Leave me a comment below or give it a rating in the recipe card. Happy Baking!


Serving: 1g · Calories: 195kcal · Carbohydrates: 24g · Protein: 4g · Fat: 10g · Saturated Fat: 4g · Polyunsaturated Fat: 5g · Cholesterol: 37mg · Sodium: 164mg · Fiber: 1g · Sugar: 15g
Tried this recipe?Mention @chocolatewithgrace or tag #chocolatewithgrace!

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  1. Tanya Schroeder says

    Mmm these really do look soft and chewy! I never thought to turn peanut butter cookies into bars! I have to try these right away!

  2. Paige says

    I made mine in a glass Pyrex as it was all I had. I put it in the oven at 350 for 30 minutes because it didn’t seem done in the middle. I took it out and let it cool for 15 minutes and the center was still raw. A little disappointed but I put it back in the oven for 10 more mins at 400 and it still was raw in the center. Was it because I used glass???

  3. Sandi says

    I made these cookies this afternoon and they were, like you said, dangerously simple to make. I added chocolate chips during the last 5 minutes of baking and spread the chocolate over the top. Super yummy and so simple! Thank you for adding a new recipe to my list of favorites.

  4. Susan J Gallup says

    I have made these twice now and they are a group favorite. I bake every day for our noon meeting and since COVID hit bars have been my go to. They are easier to cut and individually wrap. My son is in the Army. I vacuum sealed and sent them to South Korea. He said they were soft and delicious.

  5. Ann Marie Jonas says

    I made these bar cookies last night. Really easy recipe which I followed to the letter. Unfortunately I think my oven temperature may be off, as I only baked them for 20 mins. as indicated… let them cool … went to cut them into bars and they were very under baked and were still like cookie dough. Will try again, but will probably leave in for longer bake time.

  6. Holly says

    5 stars
    We made these for Christmas and we are all in love with them!!! I love bar recipes it makes it easy for my little ones to help. I was wondering if you thought we could use this recipe and make these in a cupcake pan as my son wants them for his birthday?

    • Mary says

      Yes, you can bake them in a muffin tin. They won’t puff up like cupcakes, but you can make cookie cups that way. I’m so glad that you like the cookie bars, Holly!

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