How long does this sugar-free meringue frosting last?

You can store extra frosting for 2-3 days in the fridge. Baked goods topped with this marshmallow meringue can be left at room temperature for up to 6-8 hours. I have actually frosting cupcakes and stored them in the fridge for 3 days wihtout any issues.

How do I make a double boiler?

Fill a saucepan with a couple of inches of water and bring it to a gentle simmer over low heat. Place a heatproof bowl on top, ensuring it doesn't touch the water. Add the ingredients to the top bowl.

How should you store this keto marshmallow fluff?

Store any leftovers in an airtight container in the refrigerator. Before using again, let it come to room temperature and whip it briefly to restore its fluffiness.

What does marshmallow fluff taste like?

Marshmallow fluff is everything that you love about marshmallows, but in a smoother and softer texture. It is very creamy, pillowy soft, and perfectly sweet and pairs wonderfully with a variety of flavors like chocolate, peanut butter, pumpkin, and lemon.

Is this a PSMF frosting recipe?

Yes! Since we are only using egg whites and allulose, this is actually one of the highest protein frosting recipes you will find! Plus, since no fat is added (no butter in this frosting!), it fits in perfectly to your PSMF diet.

Why did my egg whites not whip up properly?

New, room temperature egg whites will whisk up faster than old, cold eggs. Make sure the bowl you whisk the egg whites in is free from any greasy residue. Make sure that no egg yolk is in with the egg whites.

Can I save my sugar-free marshmallow frosting if it is not forming stiff peaks?

Yes but only if you have some egg white protein powder. Add 1 tablespoon at a time while whipping the eggs and continue to do so until you have added approximately 4 tablespoons of powder.

How do I get the "roasted" look for this keto marshmallow fluff?

You will need a kitchen torch to torch the marshmallow to get the roasted look. Do NOT place the frosting in the oven under the broiler and the frosting will turn into liquid form VERY quickly.

Homemade Sugar-Free Marshmallow Fluff Frosting - PSMF recipe

Ingredients

Units Scale

1/2 tsp cream of tartar
4 medium egg whites (approximately 3/4 cup)
1 cup powdered sweetener (I use allulose or Swerve Confectioner)
1 tsp vanilla
Optional - 1/4 cup egg white powder

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Instructions

Mix the egg whites, sugar substitute and cream of tartar in a heat-proof bowl above a pot of simmering water.
Heat the meringue mixture with constant stirring until it reaches 160 - 165 ºF and the sweetener has melted.
Remove from heat and transfer the hot meringue mixture into a stand mixer with a whisk attachment (or use a hand mixer with the double beater attachment). Whisk the mixture for 5 - 7 minutes, until it reaches room temperature and forms stiff, glossy peaks. If using, add the vanilla and the egg white powder. Whisk for an additional 1 minute.
Make sure the meringue is completely cooled (to room temperature) before you top any cold pie, otherwise, the cold pie filling could soften too much and melt.

Notes

Nutritional information is for the ENTIRE batch (that's right...4 whole cups!) and comes in at only 88 calories.

Author: Cat
Prep Time: 2 minutes
Cook Time: 7 minutes
Category: Dessert
Method: No-Bake
Cuisine: America, Fall, Holidays
Diet: Gluten Free

Nutrition

Serving Size: 1 entire batch
Calories: 88
Sugar: 2.3
Fat: 0.2
Carbohydrates: 3.3
Fiber: 0
Protein: 14