Fat-Free, Sugar-Free, ALMOST Calorie-Free Marshmallow Recipe

Fat-Free, Sugar-Free, ALMOST Calorie-Free Marshmallow Recipe (Contest Prep Friendly!)

During a contest prep diet I’m constantly experimenting to try to come up with the no-low calorie treats that I can easily fit into my diet for variety and to cure any sweet cravings, especially at night!

If you follow any of my social media pages then you know I LOVE using sugar-free Jell-O and plain gelatin and this marshmallow recipe is no exception. With only 3 ingredients they are so simple, not to mention delicious, and basically ZERO calories! (See below for calorie count)

Fat-Free, Sugar-Free, and ALMOST Calorie-Free Marshmallows!


2.5 packages of powdered unflavored gelatin (I use Knox)

1 tsp vanilla extract (or flavor extract of your choice)

1 cup Splenda (or equivalent zero calorie sweetener of your choice)

1 cup water

Optional: cocoa powder, protein powder, flavored sugar-free syrups

To Make:

  1. Add 1/2 cup cold water to a large mixing bowl, add gelatin powder, stir, and let sit for 10 minutes
  2. Bring remaining 1/2 cup water to a boil (I microwave), pour boiling water into cold water/gelatin mixture slowly down the side of the bowl while mixing on low with electric beaters/stand mixer and mix on low for 2 minutes
  3. Mix on medium for 2 minutes while slowly adding in vanilla and Splenda
  4. Continue mixing with electric beaters or stand mixer for 10-12 minutes, until your marshmallow mixture has reached a thick consistency making medium-hard peaks when removing the beaters
  5. Transfer mixture into a parchment lined baking dish, spread out gently with spatula and let set 2-3 hours on counter or in the fridge until set
  6. Once set cut into pieces/shapes of your choice, coat in cocoa powder, sweetener, or protein or leave plain!


Get creative by adding in different flavor extracts, syrups, and protein powder! Here are some of my favorites:

Strawberry: Add 1/2 tbsp calorie-free Walden Farms strawberry syrup

Chocolate: Add cocoa powder or calorie free chocolate syrup, coat in cocoa powder once set

Mint-Chocolate: Add mint flavor extract and cocoa powder


An entire batch of marshmallows using this recipe has only 40 calories, YES, 40 (all coming from protein!)

I cut mine into 24 pieces to make each marshmallow only 1.6 calories per piece!

Try using as a way to cut the calories in your favorite summer S’more treats, replace the regular chocolate with sugar-free chocolate and try using Quest bars as your “cookie” for the outer layer, totally guilt-free and DELISH!

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12 Comments. Leave new

  • I only have a high speed blender and it starts to heat the food after a few minutes so what do u suggest? Thanks 🙂

  • Would these roast over a camp fire the same as store bought?

    • Hi Jen,

      I have tried it and it’s not exactly the same, but it definitely roasts and is SO yummy,melty, ooey gooey!!

  • doesn’t splenda actually have calories? i read that it’s 96cals per cup

  • Have you tried using this for rice crispy treats?! Just wondering if its possible or a waste of time 🙂

    • I have’t but I’m dying too! I would recommend not setting the marshmallows and then melting down like a normal recipe but just using the marshmallow recipe, adding the rice cereal, and then letting it set like that!

  • What’s the texture like? All of the low carb marshmallows I’ve made in the past have tasted good, but they had a wet texture.

    • They are wet but you can roll them in cocoa powder or let them dry out on the counter overnight to give them more of a “regular” marshmallow texture 😀

  • I’d love to make these as a Xmas gift for fitness obsessed mum. How long in advance do you think I can make these?

    • Hi Julia! I would recommend a couple of days in advance, that way you can let them “dry” out a bit so they are more like a regular marshmallow texture!


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