General

Gather all ingredients and equipment, including a cocktail shaker, jigger, strainer, and a chilled rocks or highball glass.

Squeeze fresh lemons and measure out the required amount of lemon juice using a jigger, discarding any seeds or pulp.

Fill the cocktail shaker with ice cubes until it is approximately two-thirds full.

Pour the measured whiskey into the shaker over the ice, followed by the freshly squeezed lemon juice.

Secure the lid on the cocktail shaker and shake vigorously for 10 to 15 seconds until the outside of the shaker feels cold.

Fill the serving glass with fresh ice and strain the cocktail mixture into the glass using a fine mesh or Hawthorne strainer.

Garnish as desired with a lemon wheel or twist, and serve immediately.