Classic 7 Minute Frosting Recipe (Fluffy & Easy to Make)

Sometimes, the best recipes are the ones that have been handed down through generations. This classic 7 Minute Frosting is exactly that—a vintage recipe that has been loved for its glossy finish, delicate sweetness, and cloud-like texture. Whether you are topping a rich chocolate cake, a delicate coconut layer cake, or even a batch of cupcakes, this frosting is a nostalgic treat that never goes out of style.

A beautiful cake covered in thick, fluffy white 7 minute frosting, showing a slice being lifted. — *Light, airy, and glossy, this vintage 7-minute frosting is the perfect topping for any cake.*

What is it

Often referred to as boiled frosting or marshmallow icing, 7 Minute Frosting is a meringue-based topping made by cooking sugar, egg whites, and water over a double boiler while beating continuously. The heat from the double boiler gently cooks the egg whites while the sugar syrup dissolves, resulting in a stable, voluminous foam. It is distinctively bright white, glossy, and holds its shape beautifully for dramatic, swoopy peaks.

Why you’ll love it

It has an incredibly light, marshmallow-like texture that melts in your mouth.
It is entirely dairy-free and fat-free, making it a great alternative to heavy, butter-laden frostings.
Unlike a standard American Buttercream, it doesn’t require cups of powdered sugar, making it less cloyingly sweet.

It takes exactly what the name promises—just about 7 minutes of active beating time.

Ingredients

1 ½ cups granulated sugar (300g)
⅓ cup cold water (80ml)

2 large egg whites (room temperature)
2 teaspoons light corn syrup (or ¼ teaspoon cream of tartar)
⅛ teaspoon salt

1 teaspoon pure vanilla extract

A bowl of bright white fluffy frosting with a whisk and yellow cakes on a wire cooling rack. — *You only need simple pantry staples to create this marshmallow-like icing.*

How to make

To begin, you will need a double boiler setup. Fill a medium saucepan with about 1 inch of water and bring it to a gentle simmer. In a large heatproof metal or glass bowl (that fits over your saucepan without touching the water), whisk together the granulated sugar, cold water, egg whites, corn syrup (or cream of tartar), and salt.

Place the bowl over the simmering water and immediately begin beating the mixture with an electric hand mixer on high speed. Continue beating constantly for exactly 7 minutes. The mixture will increase in volume, turn bright white, and eventually form glossy, stiff peaks. Once stiff peaks form, carefully remove the bowl from the heat. Add the vanilla extract and beat for another 1 to 2 minutes off the heat until the frosting cools slightly and reaches a spreadable consistency.

Thick white frosting being spread over a baked cake in a rectangular pan. — *Beat continuously for exactly 7 minutes over simmering water to achieve these stiff peaks.*

How To Serve

This frosting is best used immediately while it is still soft and pliable. It spreads wonderfully over a classic White Cake or a decadent Chocolate Fudge Cake. Because of its fluffy nature, you don’t need piping tools; simply use an offset spatula or the back of a spoon to create beautiful, rustic swirls and peaks. You can also toast the edges with a kitchen torch for a gorgeous toasted-marshmallow effect.

A wire whisk coated in thick, glossy white 7-minute frosting with dramatic peaks. — *The final frosting should hold deep swirls and stiff peaks that melt in your mouth.*

How To Store

7 Minute Frosting is notoriously tricky to store. It is best enjoyed on the day it is made because it tends to dry out and form a slight crust over time. If you must store the frosted cake, keep it at room temperature under a cake dome. Do not refrigerate it, as the moisture in the fridge will cause the frosting to weep and break down.

FAQs

Why did my frosting stay runny?
This usually happens if your bowl was touching the boiling water or if you didn’t beat it for the full time. The heat needs to slowly cook the egg whites to create stability.

Can I use a stand mixer?
While traditional recipes use a hand mixer over a stove, you can use a stand mixer if you have a bowl that fits securely over a pot of simmering water, similar to making a Swiss Meringue Buttercream.

Is this safe to eat since it contains egg whites?
Yes, cooking the egg whites over the double boiler brings them to a safe temperature (around 160°F or 71°C), effectively pasteurizing them.

Note

Ensure your mixing bowl and beaters are completely free of grease before starting. Even a tiny speck of fat can prevent your egg whites from whipping up properly. Avoid making this frosting on very humid days, as the sugar can absorb moisture from the air, making the frosting sticky.

Nutrition information

Serving Size: 2 tablespoons (approx. 1/12 of recipe)
Calories: 105 kcal
Carbohydrates: 26g

Protein: 1g
Fat: 0g
Saturated Fat: 0g

Sugar: 25g
Sodium: 35mg

Tips and Tricks

Have all your ingredients measured and ready before you place the bowl over the heat; this recipe moves fast once you start.

If you don’t have corn syrup, cream of tartar is an excellent substitute to prevent the sugar from crystallizing.
For flavor variations, you can swap the vanilla for peppermint extract during the holidays, or fold in a bit of citrus zest for a bright, summery cake.