Watermelon Whiskey Sour

The Watermelon Whiskey Sour brings a refreshing summer twist to a classic cocktail. Fresh watermelon adds a juicy, fruity base that pairs perfectly with the rich depth of bourbon or rye whiskey. Balanced by lemon juice, simple syrup, and a couple dashes of bitters, this version also includes an egg white for a smooth, silky texture. Garnished with a lemon wheel and a wedge of watermelon, it’s a vibrant drink that’s both bold and bright, ideal for warm afternoons or backyard gatherings.

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Tasting Notes

The Watermelon Whiskey Sour offers a balanced mix of sweet, tart, and bold flavors. Fresh watermelon adds a subtle fruitiness that blends seamlessly with the warmth of bourbon or rye. Lemon juice brightens the drink and complements the rich base, while simple syrup keeps the acidity in check. The addition of egg white adds a silky, foamy top that smooths out the sharper notes. A couple dashes of bitters round out the flavor profile with gentle spice and complexity. Served over ice, this cocktail is equal parts cooling and spirited especially when garnished with a lemon wheel and watermelon wedge.

Equipment and Glassware

To prepare this Watermelon Whiskey Sour, you’ll need a few basic tools: a cocktail shaker, a muddler, a jigger for measuring, and a strainer. A fine mesh strainer is also helpful for achieving a smooth texture. Because this recipe includes egg white, a dry shake is essential, so be sure your shaker seals tightly. For serving, a rocks glass (also called an old fashioned glass) is ideal it holds ice well and allows space for both garnish and foam. A sharp knife will come in handy for prepping the lemon wheel and watermelon wedge.

Ingredients

• 3 watermelon cubes
• 2 oz bourbon or rye whiskey
• ¾ oz fresh lemon juice
• ½ oz simple syrup
• 2 dashes Angostura bitters
• 1 egg white
• Garnish: lemon wheel and watermelon wedge

Instructions

• Add the watermelon cubes to a cocktail shaker and muddle thoroughly to release the juice.
• Pour in the whiskey, lemon juice, simple syrup, bitters, and egg white.
• Shake without ice for about 10–15 seconds to create a frothy texture.
• Add ice and shake again until well chilled.
• Fill a rocks glass with fresh ice.
• Strain the cocktail into the glass.
• Garnish with a lemon wheel and a wedge of watermelon.

Pro Tips

• Use ripe, seedless watermelon for best flavor and easier muddling
• Dry shake well to ensure a stable foam from the egg white
• Fine strain to remove watermelon pulp for a smoother finish
• Adjust simple syrup to taste based on the sweetness of your watermelon
• Chill your glass ahead of time to keep the drink colder longer
• Use a clear ice cube for a cleaner presentation
• For more citrus punch, add a lemon twist in addition to the garnish
• Use a flavored bitters, like orange or peach, for a different spin

When to Serve

This Watermelon Whiskey Sour fits right in during warm weather, particularly in late spring through summer when watermelon is at its best. It’s great for backyard gatherings, barbecues, rooftop evenings, or as a signature drink for summer parties. Because of its layered flavor and balanced strength, it also works well as a late afternoon or early evening cocktail. Whether you’re hosting friends or relaxing solo, it adds a cool, refreshing option to your whiskey lineup.

Which Liquor Brands to Choose

Bourbon:

• Maker’s Mark
• Buffalo Trace
• Woodford Reserve
• Elijah Craig Small Batch

Rye Whiskey:

• Bulleit Rye
• Rittenhouse Rye
• Old Forester Rye
• Sazerac Rye

Similar Cocktails

• Matcha Gin Sour
• Citrus Cloud
• Limoncello Mezcal Sour
• Kiwi Watermelon Bramble
• Enzoni