Home » desserts » Keto ‘Rice Krispie’ Treats (with our marshmallows!) 🙊 gluten free

Keto ‘Rice Krispie’ Treats (with our marshmallows!) 🙊 gluten free

Meet the low carb cereal bars of your dreams. These keto ‘Rice Krispie’ treats are properly crisp (!!), and with that marshmallow taste we all know and love!

Keto Rice Krispie treats with Magic Spoon cereal
Keto ‘Rice Krispie’ Treats (with our marshmallows!)

Keto ‘Rice Krispie’ Treats

With our marshmallows!

I’ve been dying to try my hand at keto ‘Rice Krispie’ treats since I ordered some Magic Spoon cereal to try (after you guys highly recommended it over on instagram!).*

We will do an in depth review later on this week, going into detail about all the keto cereal brands currently in the market. None of them are perfect, but Magic Spoon is very good IMO (and its frosted and fruity flavors are perfect for these marshmallow treats!).

And fact is, if you use a good quality gelatin (think grass-fed etc), you’ll actually be adding in a good amount of nutritional punch.

And yes, please do expect them to be different from actual Rice Krispie treats. (Obviously?) as we aren’t using puffed rice, and the keto marshmallows aren’t ‘re-melted’ (only actual sugar has this ability).

*Note: I purchased my first boxes of Magic Spoon myself a few months back, highly enjoyed them (we’ll get into this) & tagged them on the gram. They since sent over another set of free boxes (thanks guys!). This post is not sponsored, but we are an affiliate (so be sure to use the code GNOMGNOM to get your free shipping!).

3-Ingredient Sugar Free, Paleo & Keto Marshmallows #keto #lowcarb #glutenfree #paleo #healthyrecipes #marshmallows #ketodessert #ketorecipes #ketodiet #smores
3-Ingredient Sugar Free, Paleo & Keto Marshmallows #keto #lowcarb #glutenfree #paleo #healthyrecipes #marshmallows #ketodessert #ketorecipes #ketodiet #smores
Keto Rice Krispie treats setting on a baking pan
Keto ‘Rice Krispie’ Treats (with our marshmallows!)
Cutting keto Rice Krispies treats
Keto ‘Rice Krispie’ Treats (with our marshmallows!)

The Deets

The marshmallows themselves are super easy (you guys tell me this very surprised all the time!). And the ingredients are also very simple: gelatin, a sweetener and vanilla extract! Add water, a touch of salt, and a little magic (i.e. chemistry) and you’ve got some seriously fluffy keto marshmallows at your fingertips.

You’ll simply be making half a batch of the marshmallow mixture, and folding it into some Magic Spoon cereal (or cereal of choice). I suggest adding the marshmallow to the cereal bowl, so you can control the stiffness of your treats.

Just like regular Rice Krispie treats, you want to add ‘just enough’ marshmallow that all your cereal is covered. I did add an extra thin marshmallow layer on top, but not really ‘necessary’ in hindsight.

And do note that I recommend using allulose as your sweetener (as opposed to xylitol), as it takes a bit longer to set (you don’t have ‘to rush’ as much). I also suggest using the lower range of sweetener amount if your palate is ‘keto adapted’, as you’ll be pairing it with the cereal.

Indulge as is, or even go for some melted chocolate on top (!!). I totally did this with some leftovers 😉 Oh, and talking chocolate, remember that you can use the leftover marshmallows for your hot chocolate!

Keto Rice Krispie treats on a marble surface
Keto ‘Rice Krispie’ Treats (with our marshmallows!)
Keto Rice Krispie treats with Magic Spoon cereal

Keto 'Rice Krispie' Treats (with our marshmallows!)

Meet the low carb cereal bars of your dreams. These keto 'Rice Krispie' treats are properly crisp (!!), and with that marshmallow taste we all know and love!
5 from 2 votes
Prep Time 15 minutes
Cook Time 5 minutes
Setting time 6 hours
Total Time 20 minutes
Course Dessert
Cuisine American
Servings 12 cereal bars
Calories 70 kcal


Totally Optional Stuff


  • Please see the post on the marshmallows for full deets. Have all ingredients ready and measured out, as you don't want to be interrupted for roughly 20 minutes. Remember that marshmallows set quickly, so you'll have roughly 4 minutes max to fold in your cereal (i.e. you want to be ready!).
  • Measure out your Magic Spoon cereal of choice into a large bowl- I used a mixture of the frosted and fruity flavors. Set aside.
  • Line a 9x9-inch pan with foil and grease well with coconut oil. I ended up using only half of the pan for the 'rice krispie treats' and the other half for some of the leftover marshmallow mixture. Set aside while you make the marshmallows.
  • Once the marshmallows are ready, turn mixer off, and quickly fold in about half the mixture into your cereal bowl to start. Just like regular Rice Krispie treats, you want to add ‘just enough’ marshmallow that all your cereal is covered (this is key so they actually resemble cereal bars).  Transfer to the prepared baking tray, and don't worry too much about what's left behind in the whisk etc, or your marshmallows will likely set in the bowl itself (!!).
  • Allow your marshmallows to dry, uncovered and at room temperature, for 6 hours or preferably overnight. Gently remove from pan and cut with a greased knife. In my experience keto marshmallows don't need dusting as they're not overly sticky, and a touch of coconut oil does wonders if need be. Store in an airtight container at room temp for 3-5 days (and yes, they stay crisp- its a miracle!).


*Don't forget to use the code GNOMGNOM at checkout to get your free shipping discount! 
And keep in mind that when calculating nutrition facts, it's generally common practice to subtract sugar alcohols as you do fiber... which essentially makes the keto marshmallows 0g net carbs.
Otherwise, Magic Spoon is 3g net carbs per 3/4 cup... so each keto Rice Krispie treat comes out to just 1.5g net carbs


Calories: 70kcal | Carbohydrates: 2.5g | Protein: 6g | Fat: 3g | Saturated Fat: 2.5g | Sodium: 60mg | Fiber: 1g
Keyword keto rice krispie treats, keto rice krispies
Whip up this recipe?Comment below or drop me a line @gnomgnom._ and tag #gnomgnomyum!


  1. katie says:

    If I’ve already made the marshmallows, and have some left over, could I re-heat and combine with this cereal and let it set?

  2. Brendan says:

    The magic spoon cereal is defintely the delish. The only problem is none of the milk alternatives really do it for me. Making my own marshmallows was a bit daunting for me, so I was going to use max mallows. How many grams of marshmallows should I use? I wasnt sure how much a half a batch was. Thanks.

    • Anne says:

      I find almond milk with a drizzle of heavy cream is perfect for magic spoon! The cream rounds out the milk flavor and adds a bit more body, which makes it all much more like regular milk.

  3. Brendan says:

    How many grams would half a batch be? I’m using max mallow because making marshmallows is too daunting of a task. The magic spoon stuff is great, too bad all the non normal milks don’t suite me.

  4. Joanne says:

    Any ingredient with ose in the word such ad ALLULOSE, GLUCOSE, SUCRALOSE ETC.. is a derivative of sugar. Each one can cause insulin spike.
    Also cannot be consider proper Keto.
    Its dirty keto.
    Also xylitol is poison to the system as well.
    Your best bet to work with monkfruit/erythritol mix, as this one will not cause insulin spikes unless you are extremely sensitive as just tasting without actually consuming flavours that taste sweet can set some diabetics into an insulin spike.

    • Gina Donza says:

      Allulose does not raise my sugar at all. I used a meter and tested after various times after eating. Please don’t spread false information. Glucose and sucralose can. Keto approved sugars such as, erythritol, monk fruit, Allulose, xylitol, and Bocha Sweet do not raise your blood sugar. Sucralose can cause your body to release insulin while not changing your blood sugar. It depends on each person and you would need to be tested to find out for sure.

  5. Shawna says:

    Wish there was an option without buying ExPeNsiVe prepackaged stuff. I like recipes that don’t rely on overpriced ready made prepackaged stuff that makes things not easily attainable. To many keep sites rely on premade stuff like$6 a bag Lily’s etc. Would love a lower cost homemade option

  6. Lisa says:

    Never been a fan of marshmallows or rice krispie treats 😲 But I’ve got to admit I continue to be amazed by the ingenuity and creativity of these keto alternatives. It is so much fun to cook this way ☺️

    • Paola van der Hulst says:

      I’m with you, fruity and frosted are my favorite! That said, I have a couple simple hacks to get the chocolate and cinnamon tasting incredible (I’ll share in the cereal post coming up this weekend) 😉 xo!

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