Fluffernutter Rice Krispie Treats

For the ideal fluffernutter taste, ooey, gooey soft rice krispie treats are stuffed with creamy peanut butter and sweet marshmallow fluff! You just need 5 ingredients and 30 minutes. Try my fluffernutter biscuits or thick and chewy fluffernutter bars next time.

The problem with these fluffernutter rice krispie treats is that they are not healthy, yet they are everything I wanted them to be. They’re squishy, ooey, and gooey, and taste like a cereal-covered fluffernutter sandwich.

Okay, it doesn’t seem especially attractive or wonderful, but you’ll just have to believe me. These are delectable.

In today’s Why Can’t Bluebirdcafela.com Just Leave Things Alone, I wanted to take the standard rice krispie treats to the next level. The basic recipe on the side of the Rice Krispies box creates a perfectly acceptable dessert, but it’s simply not enough for me. They should be softer and more buttery.

So I addressed those issues by adding additional marshmallows and butter. However, I want more taste. I was just bored.

You all love fluffernutter recipes!

I’ve been looking through my site statistics to see what my audience (that’s you!) has been enjoying recently, and the fluffernutter cookies and fluffernutter bars are constantly near or at the top of the list.

So I felt if you liked previous fluffernutter recipes, you would like this one as well. And rice krispie treats already have marshmallows in them, so all I’d have to do is add peanut butter!

Not so fast, Bluebirdcafela.com.

Marshmallow fluff makes these bars super soft

Because marshmallows and marshmallow fluff do not have the same taste, just adding peanut butter was insufficient. It truly required the addition of peanut butter and fluff. Atop the marshmallows.

And guess what? Let’s throw in some extra small marshmallows for good measure.

As a consequence, the rice krispie treats were the softest and most tasty I’d ever cooked. And it’s potent with the fluffernutter taste I desired.

How to make the best rice krispie treats

Spray the baking pan with nonstick spray and line it with parchment paper. This assures that they will not stick! Make sure there’s plenty overhang on the sides so you can easily remove the bars out of the pan.

Make use of fresh marshmallows! This cannot be overstated. If you attempt to use a bag of little marshmallows that have been sitting in the back of your cupboard since last Christmas and have the texture of small doorstops, they will not melt and you will be disappointed. New, squishy, soft marshmallows are required!

And, for that matter, use fresh cereal. You will also notice if you use stale cereal.

Don’t pack them too firmly into the pan. You want to spread them out lightly to properly distribute them in the pan, but not pack them down. The more tightly packed they are, the thicker they will be, which means less light and chewy. And we want it to be light and crunchy! You may spray your hands with nonstick spray and gently press it down with your palms, or add another sheet of parchment paper on top before pressing it down with your hands.

Set aside some small marshmallows for the finish. Adding more unmelted marshmallows to the final result adds a bit extra fluff and chewiness. When you come across intact little marshmallows, it’s a pleasant surprise. That’s why I leave a cup or two of marshmallows until the very end.

Tips for slicing rice krispie treat bars

I’ll let you in on a little secret: after I take them out of the pan, I slice off the edges to level the corners so no one gets a funny, slanted, lopsided piece.

Then I eat the portions that have been chopped off. It is compensation for my time, in my opinion. And, of course, taste testing.

Not a secret, but a useful hint: slicing bars like this is much simpler with a rolling pizza cutter (affiliate link) rather than a huge knife. It’s large enough to cover the breadth and length of the bars, resulting in one continuous, even cut.

Furthermore, it is gentler on your cutting boards since you just rock the blade from side to side rather than digging in and dragging a knife. Win-win.

Can I make these in a 9″x13″ pan?

You certainly can! Simply double the recipe; they will be thicker than in a square pan, but the taste will not be affected.

How to clean saucepan after making rice krispie treats

If you’re using a nonstick pan (which should have been stated properly), you may have to work a bit more to clean it.

Scrape out any extra sticky rice krispie leftovers with a spatula, then refill with boiling water and return to the heat. Bring to a boil and let aside for a few minutes. The residue will float to the top after melting off the edges and bottom!

Then, skim it out of the water and discard it, then clean the pan as normal with dish soap and water.

Are they really sticky and messy?

Surprisingly, they are not excessively sticky or difficult to eat! That was a compromise I was ready to make for the taste I desired.

Any leftovers, however, should be stored in an airtight container between layers of parchment paper to prevent them from adhering together.

However, stacking them without parchment paper is acceptable for food photography reasons.

Do as I say, not as I do.

How to store rice krispie treats

For 2 days, keep them at room temperature between layers of parchment paper in an airtight container.

You may also freeze them for up to one month in an airtight, freezer-safe container between layers of parchment paper.

Allow them to thaw for approximately 30 minutes on the counter at room temperature before serving. Because of the marshmallow fluff, it takes a little longer than regular 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
  • Hunger Thirst Play Peanut Butter Banana Bread with Salted Chocolate Chips
  • Nutter Butter Waffles by Whitney Bond
  • Spicy Southern Kitchen’s No Bake Peanut Butter Pie

Fluffernutter Rice Krispie Treats


Prep Time: 5mins
Cook Time: 5mins
Total Time: 30mins
Servings: 12bars
    ✓ Read the recipe beginning to end
    ✓ Check oven calibration
    ✓ Check expiration dates
    ✓ Properly measure ingredients
    ✓ Check butter temperature


Ooey, gooey soft rice krispie treats are loaded with creamy peanut butter and sweet marshmallow fluff for the perfect fluffernutter flavor!


  • 9×13 baking dish
  • Parchment paper
  • Mixing bowls
  • Medium saucepan
  • Spatula


  • 6cupsRice Krispies cereal
  • 6tablespoonsunsalted butter
  • 6cupsmini marshmallows, divided
  • 1cupcreamy peanut butter
  • If your peanut butter does not contain any, add a pinch of salt.
  • 7.5ouncecontainer of Marshmallow Fluff


  • Line a 913 baking pan with parchment paper, allowing the edges to hang over the sides, and spray with nonstick spray. Place aside.
  • Set aside the Rice Krispies in a large mixing dish.
    6 cups cereal Rice Krispies
  • Melt butter in a medium saucepan over low heat. Add 4 cups micro marshmallows and heat, stirring constantly, until melted and partially blended. It’s good if it’s not completely combined; it’s better that way!
    6 cups tiny marshmallows, 6 tablespoons unsalted butter
  • Turn off the heat and mix in the peanut butter. If the peanut butter you’re using doesn’t have salt added, add a pinch of salt now and mix to blend.
    1 cup creamy peanut butter, 1 teaspoon salt
  • Pour the peanut butter mixture into the Rice Krispies, then add the Fluff and remaining 2 cups small marshmallows and swirl to coat and incorporate.
    Marshmallow Fluff (7.5 oz.)
  • Place in prepared baking dish and press into an equal layer.Tip: If you have another 913 pan, use the bottom of that pan to push into the top of your dish to properly spread everything! You may either coat your hands with nonstick spray and press it down with your palms, or add another sheet of parchment paper on top before pressing it down with your hands.
  • Allow it set for at least 15 minutes before cutting into 12 big bars. Serve and have fun!


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 Facts

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


Can you use fluff instead of marshmallows?

Marshmallow fluff’s airy texture is ideal for substituting melted marshmallows in recipes. It may be added to Rice Krispy treats, topped with Coca, and incorporated into other desserts. 12 cup fluff replaces 1 cup marshmallows (or 8 big mallows).

Why do body builders eat rice krispie treats?

Because of their simple carbohydrate content, Rice Krispies treats are an excellent pre-workout snack. Because carbohydrates are the body’s main fuel source, consuming a high carb snack before a workout may increase energy and performance.

Why did Rice Krispies get discontinued?

Kellogg’s is having problems keeping up with customer demand after experiencing major delays in manufacturing due to the epidemic and the labor strike. Kellogg’s will not be able to recover until the 2022 barley harvest is ready.

What happens if you put too much butter in rice krispie treats?

Too much marshmallow and butter will result in an extremely sticky, wet, or soggy slice, while too little will result in a hard, dry, or crumbly slice. For this recipe, I suggest using a baking scale to get the ratio JUST RIGHT, resulting in the ultimate chewy yet crispy Rice Krispie Squares.

What is a substitute for marshmallows in Rice Krispies?

Almond Butter – Almond butter and maple syrup combine to form a sticky combination that may be used in place of marshmallows. You can create rice crispy snacks without using marshmallows this way!

How many marshmallows equal a jar of marshmallow fluff?

ANSWER: 1 (7-ounce) container of marshmallow crème equals 2 cups micro marshmallows. When substituting marshmallows for crème, add roughly a teaspoon of light corn syrup per cup of marshmallows.

What in Rice Krispies give you a pump?

Rice Krispies Treats include a lot of simple carbs (from the cereal to the sugar used to glue it together), which contribute to the immediate energy boost.

Why do Rice Krispies taste different now?

Rice accounts up just 48% of the Rice Krispies Vanilla, compared to 89.8% in the original. Some of the new components include corn flour (13%), which may be genetically engineered, and whole wheat flour (10%). Furthermore, the manufacturer increased the amount of sugar to “enhance the crispiness.”

What is the Rice Krispies trend for working out?

TikTok is experiencing a delightful new fitness trend. Users of the popular social networking app are posting videos of themselves eating Rice Krispies snacks before working out, saying the sweet marshmallowy snacks are the secret to greater exercise outcomes.

Why are Rice Krispies banned in some countries?

Japan and the European Union have banned three of the most popular cereal brands: Frosted Flakes, Honey Bunches of Oats, and Rice Krispies. Why? They contain BHT, a preservative that some believe causes cancer.

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