ChickenKeto Recipes

Keto Marshmallow Fluff Recipe: A Heavenly Low-Carb Delight

If you’ve been missing the sweet and fluffy goodness of marshmallow fluff while following a keto lifestyle, you’re in for a treat! In this detailed guide, we’ll walk through a step-by-step Keto Marshmallow Fluff recipe that not only captures the essence of the classic treat but does so without the excess sugar and carbs. Get ready to indulge in the heavenly sweetness of keto marshmallow fluff that can be used as a topping, filling, or a delightful ingredient in your favorite keto desserts.

Understanding Keto Marshmallow Fluff:

Traditional marshmallow fluff is a sugary delight that often finds its way into recipes for pies, ice cream sundaes, hot cocoa, and more. Adapting this classic to fit into a keto lifestyle involves replacing high-carb ingredients, such as sugar and corn syrup, with keto-friendly alternatives. This Keto Marshmallow Fluff recipe achieves the luscious texture and sweetness you crave while keeping the carb count low.

Keto Marshmallow Fluff Recipe:


  • 3 large egg whites, at room temperature
  • 1/2 cup powdered erythritol or preferred keto-friendly sweetener
  • 1/4 teaspoon cream of tartar
  • 1 teaspoon vanilla extract
  • Pinch of salt


1. Prepare Equipment:

  • Before you begin, ensure that your mixing bowl and beaters are clean and free from any grease, as this can affect the fluff’s ability to whip up.

2. Create a Double Boiler:

  • Fill a saucepan with a few inches of water and bring it to a simmer. Place a heatproof bowl over the saucepan, ensuring it doesn’t touch the water. This setup creates a double boiler.

3. Combine Ingredients:

  • In the heatproof bowl, combine the egg whites, powdered erythritol, cream of tartar, and a pinch of salt.

4. Whisk Constantly:

  • Whisk the mixture constantly over the simmering water. The heat helps dissolve the sweetener and pasteurizes the egg whites, making them safe to eat.

5. Whip Until Stiff Peaks:

  • Continue whisking until the mixture reaches stiff peaks. This can take about 7-10 minutes. You want the texture to be smooth, glossy, and able to hold its shape.

6. Add Vanilla Extract:

  • Remove the bowl from the heat, and gently fold in the vanilla extract. Be careful not to deflate the fluff; a gentle folding motion works best.

7. Cool and Store:

  • Allow the keto marshmallow fluff to cool before transferring it to a jar or airtight container. It can be stored in the refrigerator for up to a week.

Tips for Perfecting Your Keto Marshmallow Fluff:

1. Use Room Temperature Egg Whites:

  • Allow the egg whites to come to room temperature before whipping. This helps achieve maximum volume.

2. Choose the Right Sweetener:

  • Select a powdered keto-friendly sweetener to ensure a smooth texture. Erythritol, stevia, or monk fruit are popular choices.

3. Cream of Tartar Stability:

  • Cream of tartar stabilizes the egg whites and helps create a fluffy texture. Don’t skip this ingredient.

4. Gentle Folding Technique:

  • When incorporating the vanilla extract, use a gentle folding motion to maintain the fluff’s airy texture.

5. Refrigerate for Optimal Consistency:

  • Let the marshmallow fluff cool in the refrigerator for a few hours before using. This helps it set and achieve the ideal consistency.

6. Experiment with Flavors:

  • Get creative by adding different extracts or flavors to customize your marshmallow fluff. Peppermint, almond, or coconut extracts can add exciting variations.

7. Use as a Topping or Filling:

  • Enjoy the keto marshmallow fluff as a topping for desserts, a filling for keto sandwiches, or a delightful addition to your morning coffee.

8. Toasting Option:

  • For a fun twist, consider toasting the keto marshmallow fluff with a kitchen torch for a low-carb s’mores experience.

9. Pair with Keto-Friendly Treats:

  • Use the marshmallow fluff as a dipping sauce for keto cookies, or sandwich it between two keto-friendly cookies for a delightful treat.

10. Portion Control:

- While keto-friendly, marshmallow fluff is still a treat. Practice portion control to stay within your daily carb limits.

Keto Marshmallow Fluff in Your Recipes:

Now that you have a jar of keto marshmallow fluff ready, the possibilities are endless. Here are a few ideas on how to incorporate this delightful treat into your keto recipes:

1. Keto S’mores Pie:

  • Create a keto-friendly s’mores pie by layering the marshmallow fluff over a chocolate and almond flour crust. Toast the top for that classic s’mores flavor.

2. Keto-Friendly Fluffernutter Sandwich:

  • Make a keto fluffernutter sandwich using two slices of almond flour bread and a generous layer of marshmallow fluff combined with sugar-free peanut butter.

3. Low-Carb Parfaits:

  • Layer the marshmallow fluff with keto-friendly chocolate mousse and crushed nuts for a decadent low-carb parfait.

4. Keto-Friendly Rice Krispie Treats:

  • Create a keto version of rice krispie treats using a combination of marshmallow fluff, melted butter, and crushed pork rinds or keto-friendly cereal.

5. Keto Marshmallow Hot Cocoa:

  • Top your keto hot cocoa with a dollop of marshmallow fluff for a cozy and comforting drink.

6. Keto Marshmallow Fluff Dip:

  • Serve the marshmallow fluff as a dip alongside fresh berries, nuts, or keto-friendly cookies for a delightful dessert platter.


This Keto Marshmallow Fluff recipe opens up a world of possibilities for those on a low-carb or ketogenic journey. By swapping traditional high-carb ingredients with keto-friendly alternatives, you can indulge in the sweet, fluffy goodness of marshmallow fluff without derailing your dietary goals. Whether you’re topping your favorite keto desserts, creating s’mores-inspired treats, or simply enjoying it by the spoonful, this keto marshmallow fluff adds a touch of sweetness to your low-carb lifestyle. Embrace the deliciousness of homemade keto marshmallow fluff, and relish the fact that you can enjoy such a delightful treat while staying true to your carb-conscious choices.

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