Holiday Peanut Butter M&M Bar Cookies

Holiday Peanut Butter M&M Bar Cookies

The base of this classic Peanut Butter M&M Bar Cookies recipe comes from our friends at Jif Peanut Butter. Instead of dropping them by the tablespoon and scoring them with the tines of a fork, I like to bake them as bar cookies, and add fun candy toppings. I used red & green M&Ms for the holidays, but you can use regular M&Ms, Reese’s Pieces, Peanut Butter Cups, chocolate chips–anything you like!

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Peanut Butter M&M Bar Cookies

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  • Author: Retrogirl
  • Total Time: 35-45 minutes


These chewy peanut butter bar cookies start off fluffy on the first day, then get chewy and perfect on the second day….if you can wait that long!



11/2 Cups Creamy Peanut Butter

1 Cup Vegetable Shortening

21/2 Cups Firmly Packed Brown Sugar

6 Tablespoons Whole Milk

2 Tablespoons Vanilla Extract

2 Large Eggs

31/2 Cups All Purpose Flour

1 Teaspoon Salt

11/2 Teaspoon Baking Soda


Preheat your oven to 350 degrees. Spray a 13×9 baking pan with Baker’s Joy, or other cooking spray.

Using an electric mixer, combine peanut butter, shortening, brown sugar, milk, and vanilla at medium speed, just until combined. Beat in eggs, one at a time.

Combine the flour, salt, and baking soda, and add to the creamed mixture at low speed until blended.

Pour into your prepared pan and top with M&Ms.

Bake for 25-35 minutes or until lightly browned on top.

Cut into 12 or 18 bars, depending on how large you want them to be.


I like to line my baking pan with parchment paper, because it promoted even browning, and it gives you a handle to help lift the finished bars from the pan. You can either use the parchment, or bake them directly in the pan.

  • Prep Time: 10 minutes
  • Cook Time: 25-35 minutes
  • Category: Baking
  • Method: baking
  • Cuisine: Holiday Baking
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