Light, fluffy, and irresistibly luscious, this homemade Marshmallow Frosting is the perfect cloud-like topping for cakes, cupcakes, and cookies. Made with just five simple ingredients—granulated sugar, egg whites, cream of tartar, water, and vanilla extract—this delightful frosting is whipped to glossy, stiff peaks, giving it a pillowy texture and a sweet, marshmallow-like flavor. The recipe uses a double-boiler technique to ensure a perfectly smooth finish while also safely heating the egg whites. Ready in just 25 minutes, Marshmallow Frosting is the ultimate choice for bakers seeking an airy, show-stopping garnish that’s as easy to spread as it is to savor. Best used fresh, this frosting will elevate your desserts with its stunning shine and melt-in-your-mouth goodness.
In a clean and heatproof bowl, combine granulated sugar, egg whites, cream of tartar, and water.
Place the bowl over a pot of simmering water, ensuring that the bottom of the bowl does not touch the water. Whisk continuously until the sugar dissolves and the mixture reaches 160°F (70°C) on a candy thermometer. This process will take about 5-7 minutes.
Transfer the bowl to a stand mixer fitted with a whisk attachment (or use a hand mixer). Beat the mixture on high speed for 6-8 minutes, or until stiff, glossy peaks form and the mixture has cooled to room temperature.
Add vanilla extract and beat for an additional 30 seconds to incorporate.
Use immediately to frost cakes, cupcakes, or cookies. The frosting is best used the same day but can be stored in an airtight container at room temperature for up to 6 hours.
Serving size | 396.9 grams (396.9g) |
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Amount per serving | % Daily Value* |
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Calories | 845 |
Total Fat 0.00g | 0% |
Saturated Fat 0.00g | 0% |
Polyunsaturated Fat 0.00g | |
Cholesterol 0mg | 0% |
Sodium 222mg | 10% |
Total Carbohydrate 204.10g | 74% |
Dietary Fiber 0.00g | 0% |
Total Sugars 201.50g | |
Protein 14.10g | 28% |
Vitamin D 0IU | 0% |
Calcium 14mg | 1% |
Iron 0mg | 1% |
Potassium 348mg | 7% |
Source of Calories