Imperial Fizz.

• Light rum: Missing
• Blended whiskey: Missing
• Lemon: Missing
• Powdered sugar: Missing
• Carbonated water: Missing

Whiskey forms the main spirit base, with a smaller amount of light rum adding a second layer. Fresh lemon and powdered sugar create the sour balance before carbonated water lengthens the drink. Shake only the still ingredients and add the soda after straining into the serving glass.