The Butterfly Pea Whiskey Sour gives a classic sour structure a visual transformation. Bourbon, lemon, syrup, and foam remain familiar, while butterfly pea flower brings a blue-to-violet shift that makes the drink memorable.
Butterfly Pea Whiskey Sour
Prep time: 5 to 8 minutes (with prepared ingredients)
Ingredients
- 2 oz bourbon
- 3/4 oz fresh lemon juice
- 3/4 oz deep indigo butterfly pea syrup
- 1 egg white or 3/4 oz aquafaba
- Lemon twist
Method
- Add bourbon, lemon, syrup, and egg white to a shaker without ice.
- Dry shake firmly.
- Add ice and shake again.
- Double strain into a coupe.
- Garnish with a lemon twist.
Bar Tools
- Jigger
- Cocktail shaker
- Strainer
Whiskey Scene Notes
Use deep indigo syrup for the strongest color. Bourbon will naturally soften the blue into violet.
Choosing the Whiskey
Choose a bourbon with vanilla, citrus, and moderate oak. Heavy tannin can dull the color and the floral edge.
Technique Notes
The color shift is strongest when the syrup is concentrated and the lemon is fresh. Do not over-acidify the drink just to chase color.
Pairing Suggestions
Pair with lemon tea cakes, goat cheese crostini, fried seafood, or bright salads.
Variations
- Use rye for a spicier version.
- Add lavender to the syrup.
- Serve over a large cube without foam.
Hosting and Service
Serve in a coupe with a simple garnish. Let the drink's color and foam carry the visual interest.
