Homemade Marshmallow Fluff
Desserts

Homemade Marshmallow Fluff

ML
By Marie Lefebvre · Updated September 20, 2026

A silky, cloud-like marshmallow fluff made using the Swiss meringue technique. With just four simple ingredients and ten minutes of prep, you'll have a dreamy, glossy topping perfect for cakes, pies, or enjoying straight from the spoon.

Prep⏱️ 10 min
Servings👥 4 servings
Difficulty📊 Easy
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🛒 Ingredients

4 servings

4
  • 480 ml (2 cups) egg whites (about 14–16 egg whites)
  • 400 g (2 cups) caster sugar
  • ¼ tsp cream of tartar (or a few drops of lemon juice)
  • 1 tsp pure vanilla extract

Directions

  1. 1

    Combine egg whites and sugar in a heatproof bowl set over a pan of simmering water, whisking to incorporate.

  2. 2

    Heat over low heat, stirring constantly with a whisk to prevent the whites from cooking, until the mixture is warm to the touch and completely smooth (about 60–65 °C / 140–150 °F).

  3. 3

    Remove from heat and transfer to a stand mixer bowl. Add cream of tartar and vanilla extract.

  4. 4

    Beat on high speed for 8–12 minutes until the meringue is thick, glossy, and holds stiff peaks.

  5. 5

    Flip the bowl to test — the mixture should not fall. Use immediately as frosting, pie topping, or pipe onto parchment paper for individual marshmallow treats.

💡 Chef's Tip

Ensure your bowl and whisk are completely grease-free before starting. Room-temperature egg whites whip faster and to a greater volume than cold ones.