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You are here: Home / Recipes / Dessert / Reese’s Peanut Butter S’mores Oatmeal Cookie Bars

Reese’s Peanut Butter S’mores Oatmeal Cookie Bars

July 21, 2014

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I took all of my favorites and put them in these bars…outrageously awesome! Reese’s Peanut Butter S’mores Oatmeal Cookie Bars – total indulgence in each bite! Love cookie bars? Make sure to try these Chocolate Chip Cookie Cheesecake Bars and Coconut Toffee Chocolate Chip Cookie Bars!

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Woohoo! Today is the start of S’mores Week! I have been SO looking forward to this week for so long because WE LOVE S’MORES! I have thought of so many s’mores recipes over the past few weeks and it was crazy hard to narrow it down to just three but these bars definitely made the cut. Unreal people.

I started with my Reese’s Peanut Butter Oatmeal Cookie Bars and got a little s’mores happy. I totally intended on going s’mores exclusively but, it’s SO hard for me to not include Reese’s 🙂 And we all know peanut butter is s’mores BFF.

The Best S’mores Bars

There were a couple of key changes that I made that really took this recipe over the top. I used graham cracker crumbs for part of the flour and while I was a tad bit skeptical at the time, I am now a total convert. The graham crackers add such flavor and texture and they really made these cookie bars the ultimate s’mores treat.

The cookie dough has peanut butter as well as Reese’s peanut butter chips which makes these bars the perfect treat for peanut butter lovers. I kept the oatmeal in the recipe because I am a total sucker for oatmeal and just love how it really holds the cookie together. Also? Then I can tell myself these bad boys are healthy – right?

Reese's Peanut Butter S'mores Oatmeal Cookie Bars - total indulgence in each bite! | MomOnTimeout.com

After pressing about two-thirds of the cookie dough into the dish, I started in on the chocolate. LOTS of chocolate. Seven Hershey’s bars made their way on to that cookie dough and honestly, I could have stopped here. But, no! We need marshmallows!

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Reese's Peanut Butter S'mores Oatmeal Cookie Bars - total indulgence in each bite! | MomOnTimeout.com

Marshmallow fluff is definitely the way to go here. It was so easy to spread it all over the Hershey’s chocolate bars and then when it baked, the fluff started peeking through the cracks and got perfectly toasted – just like s’mores should be!

I mixed in some chopped up Reese’s miniatures into the remaining cookie dough and then dropped it by the teaspoonful on top of the marshmallow layer. It took all of my willpower to keep from grabbing a spoon and just digging in at this point.

Reese's Peanut Butter S'mores Oatmeal Cookie Bars - total indulgence in each bite! | MomOnTimeout.com

A short trip to the oven yielded the most beautiful cookie bars I have ever seen…

Reese's Peanut Butter S'mores Oatmeal Cookie Bars - total indulgence in each bite! | MomOnTimeout.com

Glorious, right? I totally wanted to get pics when the chocolate was all ooey-gooey and melty but my schedule unfortunately was not on my side. Check out that marshmallow though – perfection!

Layer after layer of just sheer indulgence. That Hershey chocolate bar layer is ridiculous – so rich and chocolatey – it totally makes you sit up and take notice. The cookie bar layers sandwich all of the s’mores flavors and are a treat in and of themselves.

More S’mores Favorites

  1. S’mores Pudding Parfaits
  2. No Bake S’mores Cheesecake Bars
  3. S’mores Rice Krispies Treats Pinwheels
  4. S’mores Cinnamon Rolls with Marshmallow Frosting
  5. 5 Minute Mocha S’mores Dip

How To Make Peanut Butter S’mores Oatmeal Cookie Bars

peanut-butter-smores-oatmeal-cookie-bars-recipe-title
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5 from 2 votes

Peanut Butter Smores Oatmeal Cookie Bars

Reese’s Peanut Butter S’mores Oatmeal Cookie Bars – total indulgence in each bite!
Course Dessert
Cuisine American
Keyword peanut butter s’mores oatmeal cookie bars
Prep Time 15 minutes minutes
Cook Time 25 minutes minutes
Chill Time 30 minutes minutes
Servings 24 bars
Calories 328kcal
Author Trish – Mom On Timeout

Ingredients

  • 12 tablespoons butter melted
  • 2 cups light brown sugar
  • ½ cup creamy peanut butter
  • 2 eggs room temperature
  • 1 tablespoon vanilla extract
  • 1 ½ cups all-purpose flour
  • ¾ cup graham cracker crumbs
  • 1 cup old fashioned oats
  • 1 tablespoon cornstarch
  • 2 ½ teaspoons baking powder
  • ½ teaspoon salt
  • 1 cup Reese’s peanut butter baking chips
  • 7 full-size Hershey’s chocolate bars
  • 7 ounces marshmallow fluff
  • 1 cup Reese's miniatures chopped

Instructions

  • Preheat oven to 350°F. Line a 9×13 inch baking dish with parchment paper and set aside.
  • Cream butter and sugar together in a large mixing bowl. Add peanut butter and continue mixing.
  • Add eggs one at a time, mixing well after each egg. Add in vanilla extract.
  • Combine flour, graham cracker crumbs, oats, cornstarch, baking powder, and salt in a small mixing bowl. Whisk to combine.
  • Add the flour mixture to the butter mixture, slowly stirring until well combined.
  • Stir in the peanut butter chips.
  • Refrigerate cookie dough for at least 30 minutes.
  • Spread 2/3 of the dough on the bottom of the pan.
  • Top with Hershey’s bars, breaking apart as needed.
  • Spread marshmallow fluff on top of Hershey’s bars.
  • Stir chopped Reese’s into remaining cookie dough.
  • Drop the remaining dough on top by the teaspoon. It doesn’t have to be perfect and it won’t cover all the marshmallow fluff.
  • Bake for 25-30 minutes. Let cool completely and then cut into bars.

Nutrition

Calories: 328kcal | Carbohydrates: 52g | Protein: 6g | Fat: 12g | Saturated Fat: 5g | Cholesterol: 16mg | Sodium: 163mg | Potassium: 217mg | Fiber: 2g | Sugar: 37g | Vitamin A: 44IU | Vitamin C: 1mg | Calcium: 60mg | Iron: 1mg
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By Trish - Mom On Timeout July 21, 2014 Bars, Chocolate, Cookies, Dessert, Favorites, Recipes, Summer

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S’mores Cinnamon Rolls with Marshmallow Frosting »

Comments

  1. Csilla Rethi says

    April 28, 2021 at 6:49 PM

    Would really love to try these, but your first ingredient has me puzzled. “12 tbsp sticks melted”… I assume it’s butter…not sure how much.

    Reply
    • Trish - Mom On Timeout says

      May 6, 2021 at 9:14 AM

      Wow, that confused me too! That is the fun of updating recipe cards, there’s always a slip up somewhere. The recipe has been fixed. Have a great weekend!

      Reply
  2. Suzanne says

    March 17, 2018 at 4:21 PM

    I am a sucker for anything smores! Let me tell you-these did not disappoint! They are sooooo good they should be illegal! I froze several of them to stop me from eating the entire pan. That actually didn’t work though because I pulled one of these out of the freezer each night for dessert until they were gone. Oops….sorry kids! Sorry hubby! 🙂

    Reply
    • Trish - Mom On Timeout says

      March 19, 2018 at 4:42 PM

      LOL! They really are THAT good 🙂 So glad you liked the recipe Suzanne!

      Reply
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Hi, I’m Trish!

Welcome to Mom On Timeout where I’m serving up real food for real families! Dinners, desserts, and everything in between!
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