Peanut Butter Cup Brown Butter Bars

This Site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to

My friend Jaime made some cookies recently that were so yummy, I just had to get the recipe. They are called Brown Butter Sugar cookies, and I seemed to remember seeing something about them on the web from one of my blogging friends. It sounded curious, and I was excited to make them myself!  I added a little twist, so today I bring you Peanut Butter Cup Brown Butter Bars.

Baking brown butter treats at home

The secret to these delicious treats are not just dark brown sugar, but browning the butter on the stovetop before adding it to the mixture. It nearly caramelizes the butter.  I like cookies, but BARS are really where it’s at for me. I don’t like edges, so the very center of the pan is my FAVE! I’m also a big texture lover, so throwing in some mini peanut butter cups as well as peanut butter CHIPS made this even more divine for me.

So soft.


So chewy.

So delicious.

I’ll let the pictures, then the recipe do the rest of the talking.

Made with Reese's Peanut butter cups and chips

5 from 1 vote
Peanut Butter Cup Brown Butter Bars
Prep Time
20 mins
Cook Time
15 mins
Total Time
35 mins
You can't go wrong with these delicious bars!
Course: Dessert
Servings: 8 -10
Author: Kristen Duke
  • 14 tablespoons unsalted butter divided
  • 2 c packed dark brown sugar divided
  • 1/4 c white sugar
  • 2 c plus 2 tbsp all-purpose flour
  • 1/2 teaspoon baking soda
  • 1/4 teaspoon baking powder
  • 1 tablespoon vanilla extract
  • 1/2 teaspoon table salt
  • 1 large egg
  • 1 egg yolk from a large egg
  • 1/2 cup peanut butter chips
  • 1 cup mini peanut butter cups
  1. Preheat oven to 350°F
  2. Line 2 cookie sheets with parchment paper.
  3. In a small skillet, melt 10 tbsp unsalted butter.
  4. Scrape with spatula continually, until the butter gets foamy on top and the butter smell gets deeper.
  5. Cook until the milk solids begin to brown, 2-4 minutes.
  6. Transfer to a bowl, add the remaining 4 tbsp of cold butter, and set aside to cool, 15 minutes.
  7. In a pie dish, combine 1/4 c packed brown sugar with white sugar, rubbing with fingers to break up the brown sugar. Set aside.
  8. In a large bowl, whisk together flour, baking soda and baking powder
  9. Add remaining 1 3/4 c brown sugar and eggs with cooled melted butter, along with vanilla and salt.
  10. Stir to combine until smooth.
  11. Add this to Flour mixture and stir until completely mixed
  12. Add in peanut butter chips and mini peanut butter cups
  13. Press mixture into square cake dish, spreading around until it's even.
  14. Sprinkle the brown sugar mixture over the top of the pan.
  15. Bake for 15 minutes, spinning the tray 180° halfway through.
  16. The pan may appear underdone, but you don't want it to overcook.
  17. Let sit until cooled.

Brown Butter Bar with Peanut Butter Cups by

Have you tried making treats with browned butter before?

Like Bars?

Here are two of my other favorite bars:


Cherry Miscellaneous Bar


Rocky Road Fudge Bar

Join The Discussion



  1. Oh yummy! How do you think of all of these great bar ideas?!

    • Kristen Duke says:

      weird, your comment went to spam at first! I just approved it…I just love a good BAR, and like to think of what would mix well!

  2. Shelby says:


    • Kristen Duke says:

      Seriously, one of my new faves!

  3. Elena says:

    I love everything about this!!

    • Kristen Duke says:

      Ha ha! So dense and delicious!

  4. NATALIE says:

    I love your pretty food pictures. I feel like I can reach right out and grab this from my computer. Much fewer calories!

    • Kristen Duke says:

      You are just the sweetest, thank you!! It’s kinda tricky to make food look good, I’ve been working on it!!

  5. Crystal says:

    Yummy! Reese’s Peanut Butter cups are one of my favorite candies. These looks amazing!! Can’t wait to try them 🙂

    • Kristen Duke says:

      Thank you, Crystal! I kinda love Reese’s PB cups, too, and the mini’s are just so easy to pop in your mouth or pop in a favorite recipe!

  6. Ooooh so delicious!! I’m obsessed with brown butter and anything with pb cups!

    • Kristen Duke says:

      I agree! Thanks for stopping by, love your site I just discovered!

  7. Deb says:

    These look good, but I always want clear complete and accurate instructions before investing the ingredients in a new recipe. What are the two cookie sheets for in step 2? How big was the cake pan you used for the bars because they look thin, so it must have been a large pan. I’m sure that makes a difference in the bake time.

  8. These bars look amazing Kristen! Reese’s are my favorite 🙂 Pinned!

  9. Wow, those look amazing!

  10. Pat says:

    What size of pan do you use? I really want to make these but it seems like a lot of dough for an 8×8 cake pan. Thanks a bunch for your help