Marshmallow Fluff Krispie Treats

Marshmallow Fluff Krispies...these krispie treats are packed with the MAXIMUM amount of marshmallows making the gooiest krispie treats you will EVER HAVE!

The Marshmallow Fluff Krispie Treats are packed with the MAXIMUM amount of marshmallow…both minis and Fluff to create the gooiest, softest krispie treat you will ever have!

There once was a time that I created the Perfect Krispie Treat and put it on the internets and claimed it to be the best above all the rest. I did that.

But unfortunately I can never leave well enough alone. It’s like my raging FOMO, which my friend Kristan clinically classified me as a few years back, when things are good, couldn’t they be better? I mean what if someone else is having MORE fun that me?

Yeah I really need to work on that…

BUT I really think that my FOMO has lead me to today’s post. I thought I had the “Perfect”, but WHAT if there’s something better? WHAT IFFF?

Seriously it’s exhausting being in my brain.

Anyhow, these Krispies I made today might be better than my Perfect for some people…but possibly not all.

Here’s the deal. I wanted to push Krispie Treats to MAXIMUM MARSHMALLOW capacity.

How many marshmallows can I stuff in a Krispie Treat and have them still hold their shape when cut. It’s really a tough job I have over here people.

When I was doing my Marshmallow Conversion experiment I got this idea…what about a Krispie Treat made from Fluff. Now I am sure this has been done, even though I didn’t consult Dr. Google…

But I didn’t want a Krispie with just fluff. I wanted the softness of the fluff, but still the have it hold together like a Krispie Treat should.

AND these krispie treats stay soft for days…it’s a miracle!

Y’all I nailed the socks off this mess. NAILED.

Adding Fluff to krispie treats makes them the GOOIEST you will ever have!

The deal is, if you add too many marshmallows your krispies will get chewy and they won’t hold the shape. I tried that when I was developing the measurements for The Perfect. So I thought, let’s not add more minis, let’s add some Fluff, because it’s the same but TOTALLY different.

What ends up happening is you get the texture of a krispie treat with more airy volume, making it spongy and soft and gooey and DIVINE.

Krispie Treats made with Fluff and mini marshmallows!!

Also, let me point out I mixed it up a little and added half Fruity Pebbles and half Krispie cereal.

I like the combo of the two better than making one with ALL Fruity Pebbles. I’ve done experiments on this as well. Trust me.

You could easily use any combo of cereals you like, or just use all one cereal.

Krispie Treats made with Fluff and mini marshmallows!!

First melt the marshmallows and stir in the cereal like you would a regular krispie…

Krispie Treats made with Fluff and mini marshmallows!!

Then get all busy with that Fluff. Or Marshmallow Creme…because as we learned yesterday they are really one in the same.

Krispie Treats made with Fluff and mini marshmallows!!

THEN mix in more minis. You know it.

Krispie Treats made with Fluff and mini marshmallows!!


Seriously look at that bowl of glorious white beauty…

Krispie Treats made with Fluff and mini marshmallows!!

Press it into a lined and greased pan…

Krispie Treats made with Fluff and mini marshmallows!!

And let it sit. You will need to let these rest for at least an hour, more if you can. The Fluff needs a little time to set up.

Krispie Treats made with Fluff and mini marshmallows!!

But then slice them. Aren’t they gorg?

I packed these krispie treats with SO MANY marshmallows and Fluff! SO soft and gooey!

I’m telling you, while I still think my Perfect Krispie is a classic recipe that you should know, if you’re looking to take it a step further…elevate your Krispie game, if you will, this is the recipe for you.

The gooiest softest krispie treats ever! Packed with the MAXIMUM amount of marshmallows!

Like I said, it’s the MAXIMUM amount of marshmallow packed into a krispie treat.

Microphone dropped.


Marshmallow Fluff Krispie Treats

  • Author: Cookies & Cups


  • 5 tablespoons butter
  • 8 cups mini marshmallows, divided
  • 1/2 teaspoon kosher salt
  • 1 1/2 cups Marshmallow Fluff
  • 3 cups Rice Krispie cereal
  • 3 cups Fruity Pebble cereal


  1. Line a 9×9 pan with foil and spray lightly with nonstick spray, set aside.
  2. In a large saucepot over medium-low heat melt the butter.
  3. Once the butter is melted add in 6 cups of the mini marshmallows and salt, stirring constantly until they’re melted. Remove the pot from the heat.
  4. Immediately stir in both cereals until coated with the melted marshmallows. Then stir in the Fluff until evenly mixed in. Finally stir in the remaining 2 cups of mini marshmallows.
  5. Spread the mixture into the prepared pan and press evenly.
  6. Allow the bars to set up for at least an hour before cutting into squares.


You can use any combination of cereals…or you could just use ALL Rice Krispies.

Store airtight for up to 5 days. These krispie treats stay soft and are even better the second day!

Here’s my handy marshmallow conversion chart in case you missed it…

Marshmallow Conversion Chart... All my marshmallow questions ANSWERED!


42 Responses

  1. Annika

    Wow, they look great. I wish I could still do these, but Kelloggs doesn’t sell Krispie Treats anymore in Germany πŸ™ don’t know why and thus all cheap versions are now gone, too. So, no more Krispie Treats here (except for the chocolate version). I think for around 90% of your recipies we are missing the ingredients in germany πŸ™

    Lots of love πŸ™‚

  2. Gloria

    This marshmallow conversion chart will be so very helpful. Marshmallows have been a hard thing to measure for years. Thanks for all of your work. The rice Krispies look so yummy.

  3. carol christianson

    i made these and used the miniature colored marshmallows and I couldn’t get them to mix with the butter and they wouldn’t melt like regular ones, think it ruined the whole thing. Is there something missing in the recipe or was it the marshmalows? hope someon can help me with this one

    1. Shelly

      I would have to say it’s the marshmallows… every recipe for krispie treats, mine or another, mixes butter and marshmallow together. I have never tried the colored marshmallows, even though I wouldn’t have thought they would have been a problem! SO sorry you had trouble!

  4. Ashley

    I adapted your recipe to make s’mores treats. They were AMAZING!!!! Love all the extra marshmallow! Thank you for sharing!

  5. Jenny

    These were AMAZING!!! I am going to make my regular rice krispie treats like this EVERY time from now on!!! So delicious!! Thanks for the FABULOUS recipe!! YUM!!

  6. Deborah Gonzales

    I was never a fan of rice krispie treats, just made them for the grandkids. I never thought they had any flavor. These, however, are FABULOUS! Triple the marshmallow and the fruity pebbles actually give some flavor. They are very sticky when you first make them. Honestly they are better the next day, and even more wonderful the second day. Less sticky and the fruit flavors have blended. You won’t be sorry you tried them!

  7. Arlene

    So, my daughter and I used this recipe last night. We only used rice krispie though (no fruity pebbles) we had the fluff. And oh my gosh, it was heavenly! It was so delicious that I had a square with my coffee this morning. ???? We love your blog! And often make your Sunday chocolate cake and brownies for our family Sunday dinners. ????

  8. Lisa B.

    I can’t wait to try these. My major complaint about krispies treats (as an adult) is they set as hard a bricks. Yours look silky, puffy, and just plain drool worthy

  9. RenΓ© Dees

    Oh my! Who is the devil the that made these??? I made them today and I don’t even care if they set up! I don’t think I’ll ever make pain old Rice Krispie treats again. I feel very ashamed because I’m tempted to hide them from my family and eat them all myself!!

  10. Sheena

    You. Totally. Nailed. It. I just made these tonight with my son and they are the most amazing Krispy treats I’ve EVER had! So so so good!

  11. SophieEV

    Thank you so much for this recipe! I had tried to make rice krispies treats before, but they were so hard, so tough, I was really disapointed. But with the addition of the fluff, it’s perfect! I loved them!

  12. Made these for my kids. They said it was too sweet. I tried one and agreed. With the fruity pebbles (which are already very sweet) and the overloading of marshmallows created a very gooey but incredibly sweet treat. I guess if you love a lot of sugar then this is the snack for you.

  13. Andrea Martinez

    Wow fantastic the presentation the lab work the perfection. This is the best ever….but I am wondering what if you coat them with milk chocolate take out the fruity ones. Would it be like a Rocky Road Extreme? I love Rocky Road candy bars they are magical in your mouth and i am not a big fan of marshmellows as you are but i do like the best. And this reciepe you invented is THE BEST.

  14. Lexi

    Sugar high! I was looking at The Perfect, and didn’t have the extra mallows, but I had some left over creme (my grandma is a marshmallow fanatic, and this was needed to be used). I added the creme to the melted marshmallows, and it was pretty good!

    Then I saw THIS recipe, and I was like YAT, I did good then!

    Anyway, I have to try this sometime, that is a LOT of marshmallow! πŸ™‚

  15. Emily

    What size of pan would you recommend if you doubled the recipe? Any changes – or is it ok to just double all of the ingredients? Thanks!

  16. Jenna

    Followed the recipe exactly and these are way to sweet. The sweetness from the fruity pebbles ruins the whole thing. I’ll use just rice krispies going forward.

  17. Ollie

    Hi Shelly !! Could I add the circus frosted animal crackers to this recipe to combine your two recipes or would that not work ?

    1. Shelly

      You could add them yes! I would probably just add a cup of chopped cookies, and press more into the top, depending on the result you are going for πŸ™‚

  18. Diana

    We (over here in Germany) had Kellogg’s Rice Crispy Squares like at least 10 years ago, they’ve been around for about 1 year in the German supermarkets and then they stopped selling those AND the cereal as well -_- They brought a special edition of cereal a few days ago so I finally were able to make some myself today aaand that recipe is FANTASTIC! Thank you SO MUCH for that I was craving those for 10 years XD The homemade are much better of course so thanks again and all the best from Berlin!

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