7 minute frosting is a beloved classic that transforms simple ingredients into a billowy, glossy cloud of sweetness. Light, fluffy, and not overly rich, this old-fashioned cooked frosting is perfect for topping cakes and cupcakes when you want a beautiful, marshmallow-like finish. Its quick preparation and show-stopping texture make it a favorite for both everyday desserts and special occasions.
Ingredients
- 3 large egg whites, at room temperature
- 1 1/4 cups (250 g) granulated sugar
- 1/3 cup (80 ml) water
- 1/4 teaspoon cream of tartar
- 1/8 teaspoon fine salt
- 1 teaspoon pure vanilla extract
Instructions
- Set up your double boiler: Fill a saucepan with 1 to 2 inches of water and bring to a gentle simmer. Make sure the bottom of your mixing bowl (preferably stainless steel or heatproof glass) will not touch the water when set over the pan.
- Combine ingredients: In the mixing bowl (off the heat), add the egg whites, sugar, water, cream of tartar, and salt. Whisk together until thoroughly combined.
- Heat and whisk: Place the bowl over the simmering water. Using a handheld electric mixer on medium speed, beat the mixture constantly for 5 to 7 minutes. The frosting will become thick, glossy, and will hold stiff peaks when you lift the beaters. If you don’t have a handheld mixer, you can use a whisk, but it will take longer and require vigorous effort.
- Check temperature (optional): If you have a candy or instant-read thermometer, the frosting is ready when it reaches 160°F (71°C), which ensures the egg whites are safe to eat.
- Finish and flavor: Remove the bowl from the heat. Add the vanilla extract and continue beating for another 1 to 2 minutes, until the frosting is thick and holds its shape.
- Frost immediately: Use the frosting right away to cover your cake or cupcakes. It sets up quickly and is best used fresh.
Tips
- Substitutions: If you don’t have cream of tartar, you can substitute with an equal amount of lemon juice or white vinegar. This helps stabilize the egg whites.
- Room temperature eggs: For maximum volume, use egg whites at room temperature. Cold egg whites will not whip up as high.
- Avoid plastic bowls: Always use clean, grease-free glass or metal bowls. Plastic can hold onto fat residue, which prevents egg whites from whipping properly.
- Don’t overcook: Overbeating or overheating can make the frosting grainy or stiff. Stop as soon as stiff, glossy peaks form and the sugar is dissolved.
Serving Suggestions
- Spread generously over a classic chocolate or yellow layer cake for a nostalgic birthday treat.
- Pipe tall swirls onto cupcakes, then toast lightly with a kitchen torch for a marshmallowy effect.
- Use as a filling for whoopie pies or sandwich cookies for a fun twist.
- Layer between graham crackers and drizzle with chocolate for a s’mores-inspired dessert.
Variations
- Lemon 7 Minute Frosting: Add 1 teaspoon finely grated lemon zest and swap vanilla for lemon extract to brighten the flavor.
- Chocolate 7 Minute Frosting: Sift in 2 tablespoons unsweetened cocoa powder with the sugar for a light chocolate twist. Beat as directed.
- Almond or Coconut: Replace vanilla extract with almond or coconut extract for a different aromatic profile.
- Berry Swirl: Gently fold in 2 tablespoons of raspberry or strawberry puree at the end for a subtle fruity note and a hint of color.
Storage and Reheating
7 minute frosting is best enjoyed the day it is made, as it can start to deflate or become sticky when exposed to air for too long. If you have leftovers, store the frosted cake or cupcakes uncovered at cool room temperature for up to 12 hours, or lightly covered with wax paper (not plastic wrap, which will make it weep) for up to 24 hours. In hot or humid weather, refrigerate the frosted cake for up to 2 days, but note that refrigeration can make the frosting slightly tacky.
Do not freeze 7 minute frosting, as the texture will break down after thawing. Re-whipping is not effective; once set, the frosting cannot be restored to its original fluffiness. If your frosting begins to lose volume, you can try beating it briefly before using, but results may vary.
Frequently Asked Questions
- Can I make 7 minute frosting ahead of time?
Because this frosting is at its best when freshly made, it is not recommended to prepare it far in advance. The texture starts to deflate and become sticky after several hours. If you must make it ahead, frost your cake or cupcakes and store as directed above, but do not attempt to store the frosting alone for later use. - Is 7 minute frosting safe to eat since it uses raw eggs?
When prepared as instructed, the egg whites are heated to at least 160°F (71°C) while beating over the double boiler, which is considered safe by food safety guidelines. Using a thermometer is optional but recommended for peace of mind. - Why isn’t my 7 minute frosting stiff and glossy?
If your frosting is runny or does not hold peaks, it may be due to fat contamination (from yolks or a greasy bowl), underbeating, or not heating enough. Always use clean, grease-free equipment, and be sure to beat over simmering (not boiling) water until stiff peaks form. - Can I color or flavor this frosting?
Yes, you can add food coloring gel or additional extracts (such as almond, lemon, or coconut) after removing the bowl from heat and before the final beating. Avoid adding liquid food coloring in large amounts, as it can thin the frosting. - How much cake does this recipe cover?
This recipe makes enough frosting to generously cover a two-layer 8- or 9-inch round cake or about 18 to 24 cupcakes, depending on how thickly you apply it. - Can I use a stand mixer instead of a handheld mixer?
It is possible, but most stand mixer bowls do not fit securely over a saucepan for a double boiler setup. For best results, use a handheld mixer in a heatproof bowl. If you only have a stand mixer, you can beat the frosting in the mixer bowl after heating the mixture over the double boiler, though you’ll need to transfer quickly and work fast.