Periwinkle Daquiri

2 oz. White Rum
1 oz. Butterfly Botanical Liqueur
1/2 oz. Fresh Grapefruit Juice
1/2 oz. Sweet Vermouth
3 dashes Angostura Bitters
Grapefruit Peel

Build first five ingredients in shaker, add ice, and shake until chilled.

Strain into a rocks glass over ice.

Garnish with grapefruit peel.