Aged Martini

Ingredients

• 11 ounces vermouth dry
• 22 ounces hendrick's gin 
• 20 servings ice cubes 
• 20 servings lemon twists for serving
• 1  oak barrel (see Note)
• 1  oak barrel (see Note)

Equipment

• funnel

Directions

1. If the barrel is new and dry inside, fill it with water and let stand until watertight, about 24 hours.
2. Drain.
3. Using a funnel, fill the barrel with all of the liquid ingredients.
4. Let age, tasting a sample once a week, until the cocktail has taken on a rounded but not overly oaky flavor, about 1 month.
5. Strain the cocktail through a coffee filterlined funnel into a glass container and store indefinitely.
6. To serve, pour 3 ounces into an ice-filled cocktail shaker and stir until chilled. Strain the drink into a chilled cocktail glass.
7. Garnish with a twist.