Lemon peel is the thin, yellow outer covering of the lemon, which is typically used in cooking and baking to provide characteristic lemon aroma and flavor to dishes without the acidity and extra liquid adding lemon juice would involve. Commercially, lemon peel is mechanically processed to make lemon oil -- there are small glands in the peel that rupture, releasing the oil. 

The aroma of lemon peel is sharp and fresh, with a strong, waxy-lemon-floral aroma, which is mainly limonene, beta-pinene, and gamma-terpinene, with neral and geranial also contributing some scent. In cocktail usage, lemon peel can either be muddled in the bottom of the tin to release oils, or used as a garnish to provide lemon aroma with each sip. 

Lemon peel can be cut into small matchsticks or removed from the lemon with a citrus zester to make lemon zest

Some popular cocktails containing Lemon peel

  • Kentucky Pilgrim — Bourbon, Maraschino Liqueur, Lemon juice, Demerara syrup, Lemon peel
  • King's Elixir — Gin, Bianco Vermouth, Goldwasser, Celery bitters, Lemon peel
  • Break Bumper — Bourbon, Triple sec, Bitters, Peychaud's Bitters, Sparkling white wine, Lemon peel, Rosemary
  • Price of Prudence — Gin, Aromatized wine, Dry vermouth, Honey Liqueur, Bitters, Lemon peel
  • Safety Dance — Dry vermouth, Bianco Vermouth, Soda water, Lemon juice, Tea syrup, Lemon peel
  • 3:20 in the Morning — Scotch, Apple brandy, Drambuie, Cynar, Lemon juice, Honey syrup, Lemon peel
  • Colonel Grey — Bourbon, Earl Grey Tea Syrup, Lemon juice, Soda water, Lemon peel
  • Saw Tooth (Featherweight) — Bourbon, Braulio, Orange bitters, Brown sugar, Lemon peel, Orange peel
  • The Naughty Sundress — Old Tom Gin, Manzanilla sherry, Elderflower liqueur, Basil eau de vie, Peach bitters, Lemon peel
  • Suze and Treuse — Suze, Herbal liqueur, Seltzer water, Tonic water syrup, Lemon peel