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Peanut Butter Mud Bars

May 7, 2012

This blog is the internet’s best kept secret. With a viewership of about….2 (thanks Mom and Dad!), it doesn’t get much traffic and I don’t talk about it very often.  Whenever I do bring it up, friends/family/coworkers tend to respond “You have a blog?!”

I recently mentioned the blog to a few coworkers, who immediately inquired as to why I had yet to bring anything in to the office. So, I took requests and was given the general instruction to make something with peanut butter and chocolate.

One of my go-to cookbooks is from my favorite NYC bakery, Buttercup Bakery. With a peanut butter-chocolate mission in mind, I scanned through the cookbook this afternoon and came across these Peanut Butter Mud Bars. And fortunately, I had all the right ingredients already in house, which is my idea of the perfect recipe. These came together pretty quickly, and I couldn’t resist taste-testing one while it was still hot from the oven. Once they cooled though, they cut beautifully and are now packaged up in parchment paper and baggies to bring to the office tomorrow. Hopefully my colleagues enjoy them as much as I did– although I guess if they do, I might be getting more frequent requests….

Peanut Butter Mud Bars (courtesy of The Buttercup Bakery Cookbook)



  • 1 cup flour
  • 1/2 teaspoon baking soda
  • 1/4 teaspoon salt
  • 1/2 cup (1 stick) unsalted butter, softened
  • 1 cup firmly packed brown sugar
  • 1/2 cup creamy peanut butter
  • 1 large egg, at room temperature
  • 1 teaspoon vanilla extract
  • 3/4 cup chocolate chips
  • 1/4 cup vanilla chips or white chocolate chips
  • 1/2 cup peanut butter chips
  • 1/4 cup coarsely chopped pecans (I used walnuts because I had them on hand)


  • 2 tablespoons chocolate chips
  • 2 tablespoons vanilla chips or white chocolate chips
  • 2 tablespoons peanut butter chip

Preheat oven to 325 degrees.

Grease and lightly flour a 9×13 inch baking pan.

In a medium bowl, whisk together the flour, baking soda, and salt. Set aside.

In a large bowl, on the low speed of an electric mixer, cream the butter and sugar until fluffy, about 2 to 3 minutes. Beat in the peanut butter until well mixed. add the egg and vanilla. Add the dry ingredients to the butter mixture and incorporate thoroughly. Fold in 1/2 cup of the chocolate chips, the vanilla chips, 1/4 cup of the peanut butter chips, and the nuts. Spread mixture evenly into prepared pan.

Bake for 25 to 30 minutes. Remove from oven and immediately sprinkle on the remaining 1/4 cup chocolate chips and 1/4 cup peanut butter chips. Allow to sit for a minute or so. Smooth out the chips with a rubber spatula as they begin to melt.

Cool for 20 minutes or so before sprinkling the topping chips evenly over the surface. Let cool completely before cutting and serving.



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