Crafting the perfect whiskey sour involves not only the right ingredients but also choosing the ideal base spirit. As National Whiskey Sour Day approaches on August 25th, it’s an excellent time to explore different whiskies that can elevate this classic cocktail.

The whiskey sour is a straightforward mix of whiskey, lemon juice, simple syrup, and often, egg white. The choice of whiskey—be it bourbon, scotch, or rye—greatly influences the cocktail’s character. Christian Shaum, a sommelier at Asador Bastian in Chicago, notes that lighter spirits like a single malt can create a smooth experience, while spicier ryes yield a bolder profile. Additionally, he emphasizes the importance of shaking the drink correctly—a nine-second shake followed by double straining can achieve the perfect texture.

Here are ten whiskies recommended by bartenders to elevate your whiskey sour:

Willett Family Estate 4 Year Bourbon

This high-proof bourbon (125 proof) offers caramel undertones, necessitating adjustments to the recipe like reducing simple syrup and increasing bitters for balance.

Jack Daniel’s Gentleman Jack

This smooth spirit brings a touch of sweetness, enhancing the cocktail’s flavor while ensuring it remains well-balanced with fresh lemon juice.

The Balvenie DoubleWood 12

For a unique twist, this scotch aged in bourbon and sherry casks adds notes of orange and honey, providing a richly flavored sour.

Eagle Rare Bourbon

With dark fruit notes and a 10-year age statement, this bourbon rounds out the cocktail and enriches its complexity.

Johnnie Walker Black Cask

This scotch imparts a smoky sweetness alongside rich, toasty notes, making it a compelling base for a whiskey sour.

Sazerac Rye

Packing a punch with 90-proof strength, this rye gives the drink a spirit-forward presence while benefiting from a richer sugar syrup.

Rabbit Hole Heigold

This high-rye bourbon combines the spice of rye with the sweetness of bourbon, creating a dual character in cocktails.

Four Roses Small Batch

A more premium version of the original, it features ripe berry and dried spice notes, thanks to its six to seven years of aging.

Buffalo Trace

Known for its balance of sweetness and spice, this bourbon offers the depth to shine alongside lemon juice and sugar.

Knob Creek

Its higher proof (100-proof) gives this bourbon a robust character that stands up to the acidity of lemon, enhancing the drink’s overall profile.

Each of these whiskies brings unique attributes to the classic whiskey sour. Whether you prefer the smoothness of a bourbon, the complexity of a scotch, or the bite of a rye, experimenting with different labels can lead you to discover your personal favorite.