Place an inch of water in a small saucepan and heat until boiling.

While the water is heating, clean your mixing bowl and whisks. Quickly rub down with a piece of citrus to ensure there is no oil residue on anything.

Add the egg whites and sugar in your clean mixing bowl and place over the boiling water.

Whisk vigorously until the mixture is white and the sugar is completely dissolved.

Remove the bowl from the saucepan and whip the egg white mixture until it forms stiff, glossy peaks.

Beat in the butter one tablespoon at a time, ensuring the piece of butter is completely incorporated before adding more.

Continue to beat until the mixture is silky smooth.

Drizzle in the caramel. Start with ⅓ cup, then slowly increase it until you reach your desired amount. Keep in mind that the caramel flavor will become more prominent over time.

Fit a piping bag with your favorite piping tip and fill with the frosting.