Vesuvio Sour: Frothy Rum, Sweet Vermouth and Lemon Cocktail

The Vesuvio Sour takes the familiar spirit-citrus-sweetener structure and adds sweet vermouth for a deeper herbal character. Light rum keeps the drink clean and approachable, while egg white creates a soft texture and a tall cap of foam. Served up in a chilled coupe, it is tart, aromatic, and more layered than a standard rum sour.

A Sour With an Unclear History

The precise origin of the Vesuvio is not clearly documented in the available recipe data. Its composition follows the established sour family, combining a base spirit, citrus, sweetener, and egg white. Sweet vermouth distinguishes it from a traditional rum sour by adding spice, herbs, and fortified-wine richness.

What You’ll Need

Ingredients

• Light rum – provides a clean, lightly sweet base without overpowering the other ingredients.
• Sweet vermouth – adds herbal, spiced, and bittersweet depth.
• Lemon juice – supplies the fresh acidity that defines the sour structure.
• Simple syrup – softens the lemon and rounds out the drink.
• Egg white – creates a silky texture and stable foam.

Useful substitutions

• No light rum? Use a lightly aged rum for more vanilla and oak character.
• No sweet vermouth? Combine dry vermouth with a small amount of simple syrup, though the result will be lighter and less spiced.
• Avoiding raw egg? Use aquafaba for a similar frothy texture.

Equipment

• Cocktail shaker
• Jigger
• Hawthorne strainer
• Fine-mesh strainer
• Coupe or coupette glass
• Citrus peeler

Foam, Citrus and Herbal Depth

The defining feature is the contrast between its bright lemon base and the darker botanical character of sweet vermouth. Light rum leaves room for both flavors to register, while the egg white smooths the edges without making the cocktail heavy. The result is compact, aromatic, and texturally rich.

Substitutions & Variations

• Use aged rum for a rounder drink with mild oak and vanilla notes.
• Try dry vermouth for a leaner, more citrus-forward variation. Add a small amount of extra syrup only if needed.
• Replace egg white with aquafaba to create foam without using raw egg.
• Add aromatic bitters to the foam for a spiced aroma and decorative finish.
• Use an orange twist instead of lemon to emphasize the sweet vermouth’s warmer notes.

Helpful Tips

• Chill the coupe before mixing so the drink stays cold after it is strained.
• Dry shake without ice first to begin building the foam, then shake again with ice for chilling and dilution.
• Double-strain to remove ice chips and produce a finer surface.
• Use fresh lemon juice. Bottled juice can make the balance taste flat or harsh.
• Express the lemon peel over the foam immediately before serving to release its aromatic oils.
• Pair the cocktail with salted nuts, olives, fried appetizers, or light seafood.
• For several servings, pre-batch the rum, vermouth, lemon, and syrup. Add egg white and shake each serving individually.