• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
Stress Baking
  • Recipes
  • Baking Basics
  • Resources
  • About
    • Facebook
    • Instagram
    • Pinterest
    • Twitter
menu icon
go to homepage
  • Recipes
  • Subscribe
  • Baking Basics
  • About
    • Facebook
    • Instagram
    • Pinterest
    • Twitter
  • search icon
    Homepage link
    • Recipes
    • Subscribe
    • Baking Basics
    • About
    • Facebook
    • Instagram
    • Pinterest
    • Twitter
  • ×

    Home » Recipes » Brownies & Bars

    Fluffernutter Rice Krispie Treats

    Published: Apr 22, 2019 · Last modified: Apr 1, 2022 by Leslie Kiszka / This post may contain affiliate links.

    Jump to Recipe Pin Recipe
    4.5 from 8 votes
    Fluffernutter Rice Krispie Treats (Peanut Butter & Fluff) | Stress BakingFluffernutter Rice Krispie Treats (Peanut Butter & Fluff) | Stress Baking
    Fluffernutter Rice Krispie Treats (Peanut Butter & Fluff) | Stress Baking
    Fluffernutter Rice Krispie Treats (Peanut Butter & Fluff) | Stress Baking
    Fluffernutter Rice Krispie Treats (Peanut Butter & Fluff) | Stress Baking
    Fluffernutter Rice Krispie Treats (Peanut Butter & Fluff) | Stress Baking

    Ooey, gooey soft rice krispie treats are loaded with creamy peanut butter and sweet marshmallow fluff for the perfect fluffernutter flavor! All you need are 5 ingredients and 30 minutes. Next time try my fluffernutter cookies or thick and chewy fluffernutter bars.

    Fluffernutter Rice Krispie Treats

    Here’s the thing about these fluffernutter rice krispie treats: there is nothing healthy about them and they’re everything I wanted them to be. They’re soft, and ooey, and gooey, and taste like I covered a fluffernutter sandwich with cereal. 

    Okay, that doesn’t sound appealing or particularly delicious, but you’ll just have to trust me. These are delicious. 

    Fluffernutter Rice Krispie Treats before being cut

    In today’s edition of “Why Can’t Leslie Just Leave Things Alone”, I needed to level up the classic rice krispie treats. The base recipe that you find on the side of the Rice Krispies box makes a perfect decent treat, but it’s just not enough for me. They need to be softer and butterier.

    So, I solved those problems by adding more marshmallows and more butter. But I still wanted more flavor. I was just… bored.

    Fluffernutter Rice Krispie Treats

    You all love fluffernutter recipes!

    Recently I’ve been digging into my site analytics to see what my audience (that’s you!) has been loving lately, and the fluffernutter cookies and fluffernutter bars are consistently near – or at – the top of the list.

    So, I figured… if you love those fluffernutter recipes, maybe you’d love another one. And rice krispie treats are already chock full of marshmallows, so all I’d need to do is add peanut butter!

    Not so fast, Leslie.

    Marshmallow fluff makes these bars super soft

    Marshmallows and marshmallow fluff don’t have the same flavor, so just adding peanut butter was underwhelming. What it really needed was the addition of both peanut butter and fluff. On top of the marshmallows.

    And you know what? Let’s add some more mini marshmallows for fun.

    That resulted in the softest and most flavorful rice krispie treats I’ve ever made. And it’s strong with the fluffernutter flavor I wanted. 

    Fluffernutter Rice Krispie Treats stacked

    Tips for slicing rice krispie treat bars

    I’m going to share a little secret with you: when I pull these out of the pan, I slice off the edges to get the corners squared so no one gets a weird, sloped, lopsided piece.

    And then I eat those cut off pieces. I consider it payment for my time. Plus, you know, taste testing.

    Fluffernutter Rice Krispie Treats edge being cut off

    Not a secret, but a helpful tip: slicing bars like these are infinitely easier when I use a rocking pizza cutter (affiliate link) versus a large knife. It’s big enough to span the width and the length of the bars, so you get one long, even cut.

    Plus, it’s easier on your cutting boards because you just rock the blade from side to side, instead of digging in and dragging a knife. Win-win.

    Let’s stare at the puddles of marshmallow fluff for a minute.

    They’re a big contributor to the softness of these bars. 

    Fluffernutter Rice Krispie Treats
    Fluffernutter Rice Krispie Treats on parchment paper

    Add mini marshmallows

    The intact mini marshmallows are a nice little surprise when you encounter them. That’s why I save a cup or two of marshmallows to add right at the end.

    If you don’t want to add them because you hate good things, that’s fine, too.

    Fluffernutter Rice Krispie Treats on parchment paper

    Are they really sticky and messy?

    Surprisingly, they’re not overly sticky and impossible to eat! That was a sacrifice I was going to be willing to make for the flavor I wanted.

    You will, however, still want to store any leftovers in an airtight container between layers of parchment paper just to keep them from sticking together.

    But you know, for the purposes of food photography, stacking them without parchment paper is a-okay.

    Do as I say, not as I do.

    Fluffernutter Rice Krispie Treats stacked on a plate
    Fluffernutter Rice Krispie Treats on parchment paper

    How to store rice krispie treats

    You can store them at room temperature between layers of parchment paper in an airtight container for 2 days.

    You can also store them in the freezer for up to 1 month – again, in an airtight, freezer-safe container between layers of parchment paper.

    To defrost, just let them sit on the counter at room temperature for about 30 minutes before serving. Due to the marshmallow fluff, it tends to take a little bit longer than your typical Rice Krispie Treats.

    If you want more peanut butter…

    • Fluffernutter Cookies
    • Fluffernutter Bars
    • Easy Peanut Butter Oreo Fudge
    • Chocolate Peanut Butter No Bake Cookies
    • Chocolate Chunk Peanut Butter Cookies
    • Peanut Butter Espresso Cookies
    • No Bake Cookie Overnight Oats
    • Buckeye Balls
    • Peanut Butter Banana Bread with Salted Chocolate Chips by Hunger Thirst Play
    • Nutter Butter Waffles by Whitney Bond
    • No Bake Peanut Butter Pie by Spicy Southern Kitchen

    After you’ve made this recipe, please consider coming back to share your experience with others by leaving a comment below with a star rating!

    Fluffernutter Rice Krispie Treats stacked

    Fluffernutter Rice Krispie Treats

    4.5 from 8 votes
    Ooey, gooey soft rice krispie treats are loaded with creamy peanut butter and sweet marshmallow fluff for the perfect fluffernutter flavor!
    Print Recipe Pin Recipe
    Prep Time 5 minutes
    Cook Time 5 minutes
    Total Time 30 minutes
    Servings 12 bars

    Equipment

    • 9x13 baking dish
    • Parchment paper
    • Mixing bowls
    • Medium saucepan
    • Spatula

    Ingredients
      

    • 6 cups Rice Krispies cereal
    • 6 tablespoons unsalted butter
    • 6 cups mini marshmallows, divided
    • 1 cup creamy peanut butter
    • 7.5 ounce container of Marshmallow Fluff
    • Pinch of salt, if your peanut butter doesn't have any

    Instructions
     

    • Prep a 9x13 baking pan with parchment paper so that the edges hang over the sides of the pan, and then spray with nonstick spray. Set aside.
    • Pour Rice Krispies into a large bowl and set aside.
    • In a medium saucepan, melt butter over low heat. Add 4 cups mini marshmallows and heat, stirring frequently, until melted and mostly combined - it's okay that it's not fully incorporated, it's better that way!
    • Turn off heat, add peanut butter and stir to combine. If the peanut butter you're using doesn't have added salt, you can add a pinch of salt at this point and stir to combine.
    • Immediately pour peanut butter mixture into the bowl of Rice Krispies, add Fluff and remaining 2 cups mini marshmallows and stir to coat and combine.
    • Turn out into prepared baking dish and press down into an even layer.
      Tip:
      If you have another 9x13 pan, you can use the bottom of that pan to press into the top of your dish for an easy way to get it evenly distributed! You can also spray your hands with a little nonstick spray and use your palms to press it down, or place another piece of parchment paper on top before using your hands to press it down.
    • Let set for at least 15 minutes, and then slice into 12 large bars. Serve and enjoy!

    Video

    Notes

    You can store them at room temperature between layers of parchment paper in an airtight container for 2 days.
    You can also store them in the freezer for up to 1 month - again, in an airtight, freezer-safe container between layers of parchment paper.
    To defrost, just let them sit on the counter at room temperature for about 30 minutes before serving.

    Nutrition

    Calories: 364kcal | Carbohydrates: 52g | Protein: 7g | Fat: 17g | Saturated Fat: 6g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 7g | Trans Fat: 1g | Cholesterol: 15mg | Sodium: 193mg | Potassium: 160mg | Fiber: 1g | Sugar: 29g | Vitamin A: 1106IU | Vitamin C: 9mg | Calcium: 12mg | Iron: 5mg
    Course Dessert
    Cuisine American
    Author Leslie Kiszka
    Tried this recipe?Leave a comment and rating!

    Related Posts

    • Fluffernutter Cookies (Peanut Butter and Fluff)
    • Fluffernutter Bars
    • Pumpkin Spice Rice Krispie Treats (Halloween Rice Krispie Treats)
    • Single Serving Rice Krispie Treat in a Mug
    • Funfetti Rice Krispy Treats
    « Copycat Ruby Tuesday Pasta Salad
    20 Easy No Bake Energy Bite Recipes »

    Reader Interactions

    Comments

    1. Heather L.

      April 21, 2022 at 3:22 pm

      5 stars
      If you like peanut butter, you must make these. OMG. Only difference I did was brown the butter before adding anything.

      Reply
      • Leslie Kiszka

        April 21, 2022 at 4:20 pm

        You’re a smart person, Heather! :) That sounds faaaaaaantastic.

        Reply
    2. Michayla

      February 22, 2021 at 8:56 pm

      This was absolutely perfect! I will never make regular rice krispies again.. They are gooey but arent oberly sticky to the point they stick to your hands.. I had a bag of jet puffed marshmallows but i was a handful short so i used store brand marshmallows.. For some reason the store brand ones dont melt like the jet puffed do.. I ended up having a couple marshmallows that never melted which tasted really great anyways… This will be a favorite in my house forever.

      Reply
      • Leslie Kiszka

        February 27, 2021 at 3:04 pm

        So glad that you liked them!

        Reply
    3. Ea Gilmore

      October 29, 2020 at 11:12 pm

      Can you only use Fluff? How would that change the outcome (texture, firmness, etc)? If you can, how much would you use to replace the marshmallows? Thx!

      Reply
      • Leslie Kiszka

        October 30, 2020 at 8:09 am

        I’m not sure what you’re planning to swap the Fluff with, but I’ve only ever made/tested this recipe with Fluff so I can’t speak to the results using anything else – sorry!

        Reply
        • Ea

          October 30, 2020 at 2:53 pm

          Sorry! I was unclear. In the pot when you’ve melted the butter you say to use marshmallows. I wonder if you could use marshmallow fluff instead. Or would that change the outcome of the recipe. Then use the fluff again like the recipe calls for.

        • Leslie Kiszka

          November 01, 2020 at 1:25 pm

          Ohhhhh, I see what you mean! Honestly, I don’t know – but my gut tells me it likely wouldn’t work as well.

        • aj

          April 21, 2022 at 6:45 pm

          The divided 6 cups of marshmallows is divided into 4 cups and 1 cup. One of these numbers is incorrect. Can anyone tell me which one?

        • Leslie Kiszka

          April 21, 2022 at 9:01 pm

          My apologies! That was supposed be divided into 4 cups in the initial mix, and 2 cups for the end. Just updated the recipe card with the correction :) But for what it’s worth, 5 cups and 1 cup would work well, too!

    4. cf

      July 25, 2020 at 6:39 pm

      Instruction #4 doesn’t form a complete sentence – seems cut off after ” If the peanut butter you’re using doesn’t…” – doesn’t what?

      Reply
      • Leslie Kiszka

        July 25, 2020 at 6:43 pm

        Thanks for letting me know there was an issue with the recipe card rendering in full – yikes! Just got that fixed – that step is to add salt if the peanut butter you’re using doesn’t have added salt and you’d like to add some yourself.

        Reply
    5. Gail Norden

      July 15, 2020 at 9:32 pm

      5 stars
      Delicious. I separated the batch into half and added mini chocolate chips after it cooled a little but before I spread it. Now I’m wondering how it would be if I made the plain version, flattened half it on the cookie sheet, spread jam on top them put the rest on top.

      Reply
      • Leslie Kiszka

        July 18, 2020 at 5:30 pm

        Ooo, that sounds good! Thanks for coming back to leave a comment and rating, Gail!

        Reply
    6. Whitney Bond

      April 29, 2019 at 7:48 pm

      5 stars
      I looooove all the marshmallow goodness in these!!

      Reply

    Let us know what you think! Cancel reply

    Your email address will not be published. Required fields are marked *

    Recipe Rating




    Primary Sidebar

    Hi there! I'm Leslie. I use baking as an outlet for relieving stress and anxiety to provide you with easy to follow homemade recipes and a little humor. About Leslie ⟶

    SUMMER RECIPES

    • Stabilized Mascarpone Whipped Cream Frosting
    • Copycat Ruby Tuesday Pasta Salad
    • Paleo Samoa Bars
    • Chocolate Chip Cookie Dough Ice Cream

    FAN FAVORITES

    • Stabilized Mascarpone Whipped Cream Frosting
    • The Perfect Banana Bread
    • Fluffernutter Cookies (Peanut Butter and Fluff)
    • Copycat Ruby Tuesday Pasta Salad

    My Favorite Thermometer

    ThermoWorks ChefAlarm

    Footer

    List of different websites that Stress Baking has been featured on

    About

    • What is "stress baking"?
    • Meet Leslie
    • Work With Me
    • Servings of Reality

    Disclaimers

    • Privacy Policy
    • Disclaimers

    Resources

    • Recipes
    • Baking Basics
    • Shop my favorites

    Newsletter

    • Sign up for email updates
    • Pinterest
    • Facebook
    • Instagram
    • Twitter
    Blue Stress Baking logo

    Not responsible for computer or phone repairs caused by excessive amounts of drool ;)

    As an Amazon Associate, I earn from qualifying purchases - see disclaimers.

    COPYRIGHT © 2015-2022 Stress Baking

    11.6K shares