To make a classic whiskey sour, combine 3/4 ounce lemon juice, 3/4 ounce simple syrup and 3/4 ounce bourbon in a shaker filled with ice. Shake well and pour into a rocks glass with ice. Garnish with a lemon wedge or cherry.
One variation to the classic version is a marmalade whiskey sour. Combine 2 1/2 ounces of bourbon, 1 ounce fresh lemon juice, 3/4 ounce simple syrup, 1 teaspoon orange marmalade and 1 dash of orange bitters into a shaker full of ice. Shake for about 30 seconds or until the marmalade is dissolved. Serve in a martini class with an orange garnish.
Another whiskey sour recipe uses grapefruit juice to give it a pink hue. Combine 2 ounces whiskey, 3 ounces of fresh grapefruit juice, 3/4 ounce of lemon juice and 1/4 ounce of black currant liqueur in a shaker. Shake well and serve in a Collins class with a garnish of your choice.
Other variations on whiskey sours include sweetening the taste by substituting or adding ingredients. For example, you can dissolve 1/4 ounce of honey and 2 ounces of water into the recipe for a smooth drink or use a 1/2 ounce of agave nectar instead of simple syrup.