This frosting is light, fluffy, and perfect for topping your favorite cakes or cupcakes.
Combine the sugar, water, corn syrup, and salt in the top of a double boiler.
Ensure the sugar is fully dissolved before proceeding to avoid grainy frosting.
Place the double boiler over simmering water and stir until the mixture is warm.
Keep the water at a gentle simmer to prevent overheating.
Add the egg whites to the warm mixture and beat with an electric mixer on high speed until the frosting triples in volume and forms stiff peaks.
Use a clean, grease-free bowl for the egg whites to ensure they whip properly.
Remove the frosting from the heat and mix in the vanilla extract.
Fold in the vanilla gently to maintain the frosting's volume.
Spread the frosting onto your cooled cake or cupcakes and enjoy.
Use an offset spatula for a smooth and even application.