Peanut Butter Mud Bars

I’ve been re-visiting some of my favorite cookbooks lately. I don’t have a vast collection, but it’s large enough that some get a little lost occasionally. The positive side to that is that when you find a formerly lost one, it’s a bit like getting a new cookbook… for free!

I happened upon this recipe while re-discovering The Buttercup Bakeshop Cookbook. Of course, it had me at peanut butter. Then, I read the description that stated that these are a favorite at the bakery. With that kind of endorsement, I started rounding up ingredients. Luckily, these are all ingredients that most of us probably have in our pantries all the time.

Peanut Butter Mud Bars are delicious bars packed with chocolate, peanut butter, white chocolate, and nuts. - Bake or Break

There are a lot of flavors at work here – peanut butter, chocolate, brown sugar, white chocolate, pecans. But, somehow it’s not overkill. Everything plays quite well together. Honestly, I didn’t really taste the pecans. They do add some crunch, but I also think that peanuts or crunchy peanut butter would do the same thing. I certainly never avoid pecan usage in my baking, so I was glad to use them and probably would again.

I actually made these twice within just a few days. They are really that good. I added a few more chips on top, mostly for aesthetic purposes. Although, I can’t complain about a little extra chocolate when given the opportunity.

Peanut Butter Mud Bars

Prep Time: 20 minutes

Cook Time: 30 minutes

Yield: 24 2-inch squares

Peanut Butter Mud Bars


  • 1 cup all-purpose flour
  • 1/2 teaspoon baking soda
  • 1/4 teaspoon salt
  • 1/2 cup unsalted butter, softened
  • 1 cup firmly packed light brown sugar
  • 1/2 cup creamy peanut butter
  • 1 large egg, at room temperature
  • 1 teaspoon vanilla extract
  • 3/4 cup + 2 tablespoons chocolate chips, divided
  • 1/4 cup + 2 tablespoons white chocolate chips (or vanilla chips), divided
  • 1/2 cup + 2 tablespoons peanut butter chips, divided
  • 1/4 cup coarsely chopped pecans


Preheat oven to 325°. Grease and lightly flour a 9″x 13″ baking pan.

Whisk together flour, baking soda, and salt. Set aside.

Using an electric mixer on low speed, beat butter and brown sugar until fluffy (about 2-3 minutes). Add peanut butter and beat well. Mix in egg and vanilla.

Gradually add dry ingredients and mix well. Stir in 1/2 cup chocolate chips, 1/4 cup white chocolate chips, 1/4 cup peanut butter chips, and pecans.

Spread mixture evenly into prepared pan. Bake 25-30 minutes, or until lightly browned.

Remove from oven and sprinkle 1/4 cup chocolate chips and 1/4 cup peanut butter chips on top of bars. Allow to sit for 1-2 minutes. Using a spatula, smooth out chips as they begin to melt.

Cool for 20 minutes. Sprinkle with remaining 2 tablespoons each chocolate chips, white chocolate chips, and peanut butter chips. Cool completely before cutting into bars.


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  1. Blog is the New Black January 19, 2012 Reply

    LOVE this!

  2. beti January 19, 2012 Reply

    you always have the best bars/brownies/blondies/etc these ones look really decadent

  3. miss holly January 19, 2012 Reply

    oh man…..these are going to be made tomorrow!!!! thank you so much!!!

  4. Mmmm these would go in an instant in my house!

  5. oh dear….i would love to make these, but am pretty sure i would end up eating every bit myself and not sharing :) i’ve seen lots of bars, but not any like these….these will definitely be added to my baking bucket list!

  6. Jacqueline January 20, 2012 Reply

    Mmmmmmm, I can see why you made them twice. They look so tasty and naughty!

  7. Ana Rita January 20, 2012 Reply

    First time at your blog and amazing recipes and photos.

    These pb bars are delicious, to bad i cannot find the pb chips (here in Portugal they don’t sell it!).


  8. Choc Chip Uru January 20, 2012 Reply

    I can’t believe these – they are absolutely the ultimate indulgence 😀

  9. michele January 20, 2012 Reply

    I like using pecans and crunchy peanut butter.

  10. Becca@learnasyougocook January 22, 2012 Reply

    I’m with Morgan these are definitely going on my Foodie wishlist. This is my first time on your site but I’m definitely adding you to my Google reader! Your pictures are so beautiful by the way…

  11. Anna January 22, 2012 Reply

    Hey! I’ve been reading your blog and have been really enjoying it, I tried making these just now! They’re out of the oven and look really good, I haven’t cut them quite yet. Thanks so much!

  12. Tina January 24, 2012 Reply

    Wow, those look absolutely amazing! I pinned it so I can make them soon!

  13. The Food Hunter January 27, 2012 Reply

    these sound yummy! might try to make them with almond butter

  14. Eliana January 30, 2012 Reply

    Hmmmm – these almost look too good to eat. Emphasis on almost 😉

  15. Anna February 1, 2012 Reply

    Okay so I made these again when I had bought Reese chips and I also got extra crunchy peanut butter, and they’re amazing! I also meant to cook them a tad less cause I felt like they were coming out a little dry and I wanted creamy, but I forgot about them again and so they were still golden brown. I will do a third attempt and try to keep a better eye on them.

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