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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!

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

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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
Cook Time 25 minutes
Chill Time 30 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. MaryW says

    October 26, 2014 at 9:56 AM

    Ok, ANOTHER recipe I gotta try to feed my peanut butter addiction. I think the only thing I’d change would be to use Special Dark as my chocolate.

    Reply
    • Trish - Mom On Timeout says

      October 29, 2014 at 5:01 PM

      Mmmm…dark chocolate would be fabulous in this recipe Mary!

      Reply
  2. Sarah@WholeandHeavenlyOven says

    August 16, 2014 at 2:01 PM

    These bars are totally crazy! Preeeeeetty sure I could make a meal outta these. No shame. 😉 Pinned!

    Reply
  3. Jocelyn @BruCrew Life says

    August 16, 2014 at 11:07 AM

    Oh, my word! You know how much I love these bars right? All of my favorites in one amazing bar! Yup, I’m drooling!!!!

    Reply
  4. Amber @ Dessert Now, Dinner Later! says

    August 15, 2014 at 6:57 PM

    OH wow! Love the step by step photos too!

    Reply
  5. Melissa @ The Alchemist says

    August 14, 2014 at 7:14 PM

    These look amazing, my mouth is drooling.

    Reply
  6. Wendy | Around My Family Table says

    July 28, 2014 at 11:24 PM

    OMG- I love the pic of the 7 chocolate bars! Out of this world!

    Reply
  7. Laura @ Laura's Culinary Adventures says

    July 22, 2014 at 12:01 PM

    Oh my goodness! Totally unhealthy but absolutely yummy!

    Reply
  8. Lindsay @ Life, Love and Sugar says

    July 21, 2014 at 8:21 PM

    They look perfect! I LOVE the reeses added in! And the oatmeal totally = healthy. 🙂

    Reply
  9. Heather @ French Press says

    July 21, 2014 at 6:58 PM

    I swear I can smell them just by looking at those pics, YUM

    Reply
  10. Amy @ Amy's Healthy Baking says

    July 21, 2014 at 6:52 PM

    Oh. My. GOSH Trish!! Do you have any left?? Any at all? Because I will seriously hop in my car this very second and take any leftovers you can give me. (I don’t live that far away!) They look incredible! All of that chocolate… And marshmallow… And Reese’s mini PB cups… Heaven. Just pure heaven. Pinning and dreaming of how awesome they taste!!

    Reply
  11. Lindsey @ American Heritage Cooking says

    July 21, 2014 at 5:36 PM

    It’s like you took every baked good that I love and threw them all into one fabulous bar! They sound delicious! Pinned!

    Reply
  12. Jenn@eatcakefordinner says

    July 21, 2014 at 3:39 PM

    Talk about DIVINE!!! This looks like the best s’more ever!

    Reply
  13. Julianne @ Beyond Frosting says

    July 21, 2014 at 1:16 PM

    Oh my gosh! Look at all that chocolate in there! Love!

    Reply
  14. marcie says

    July 21, 2014 at 9:53 AM

    These bars look crazy good, Trish! I love the addition of the oatmeal so they’re nice and chewy, too. 🙂

    Reply
  15. Mir says

    July 21, 2014 at 4:16 AM

    I love that you went nutty here! Peanut butter chips and peanut butter cups with s’mores! Holy Reese’s! These are magnificent!

    Reply
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Hi, I’m Trish!

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