Peanut Butter M & M Blondies

If you are in need of a quick last minute treat to take to a cookout or potluck, this is for you. I love Peanut Butter M & M’s. Peanut M&M’s used to be my favorite until they started making these. They add a nice crunch and little more peanut butter flavor and that can’t be all bad.


I picked up a new pan at GFS this week. It is a 1/4 sheet pan. Perfect size for brownie or bar recipes.

The recipe is simple and can be made in under an hour.

Prep TIme: 10 min         Cook Time: 20-25 min

Servings: 24


1/2 cup peanut butter
4 tablespoons butter, softened
2 eggs
3/4 cup packed brown sugar
1 teaspoon vanilla extract (I use Rodelle)
2 Tbsp. marshmallow fluff (Optional)
2/3 cup all-purpose flour
1 teaspoon baking powder
1/4 teaspoon salt

  1. Preheat oven to 350° F. Grease an 8-inch square or 1/4 sheet baking pan.
  2. In a large mixing bowl, cream together the peanut butter and butter.
  3. Add the eggs, brown sugar, vanilla and marshmallow fluff. Beat until light and fluffy.
  4. In a separate bowl, combine flour, baking powder, and salt.
  5. Add flour mix to the butter mixture and mix until well blended. Stir in M & M’s.
  6. Spread batter evenly into pan and bake for 20 to 25 minutes or until toothpick comes out clean.
  7. Let cool on wire rack and cut into 2 inch squares.



Adapted from “Peanut Butter Brownies 1” at  allrecipes.com

Find me and other great foodies at Fiesta Friday #70, hosted by the Amazing Angie, co-hosted by Mollie @ The Frugal Hausfrau and Dini @ Giramuk’s Kitchen. Link up now and for great recipes. :))

22 thoughts on “Peanut Butter M & M Blondies”

  1. I honestly didn’t know there was a difference between peanut and peanut butter M&Ms. These sound tasty, and I love the bright colors! Have a great weekend!!

  2. Happy Fiesta Friday, Quinn! These sound so great – all my favorite flavors! I checked out GFS, your link for the sheet pan and got lost for awhile there! I loved reading about all the restaurant trends and how restaurants can cater to boomers, GenX and Millennials and what’s hot now!

    Well these bars are gonna be hot at my house! 🙂

    1. Hey Mollie. Congratulations on Co-Hosting Fiesta Friday this week. That is awesome :)))
      Havent talk to you all week. I was very busy. Got an idea I want to run by you. I will send you an email soon. How is twitter going? Quinn Happy FF!!

      1. It’s been fun! And I haven’t really worked on twitter – I’ve been meaning to, though! 🙂 And I will! I’ll look forward to hearing it!

  3. Hello, Quinn. These bars are so delish! I haven’t tried this kind of M&M. It’s so dun now that M&M includes many varieties of chocolate candies now. Mint, dark chocolate and salted&sweet are my new favorites. Happy FF! 🙂

  4. Oooh, I didn’t know peanut butter M&M’s existed! Very exciting! Will look around for them in the UK. Thanks for sharing this yummy recipe Quinn! 🙂

      1. 10 flavours!!!! Ok, I think we’re a bit behind in the UK and Spain (one kind only). You’re welcome and have a lovely weekend too! 🙂

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