Northern Glow

Use 2:1 rich simple syrup for its listed portion.

Chill an Old Fashioned glass in preparation for serving.

Prepare a garnish by zesting the peel of a pink grapefruit.

In a shaker, combine the Hayman's London Dry Gin, Cointreau L'Unique triple sec, freshly squeezed pink grapefruit juice, lemon juice, sugar syrup, and Fee Brothers Rhubarb bitters with ice.

Shake vigorously to blend the flavors and chill the mixture.

Strain the cocktail into the prepared Old Fashioned glass filled with fresh ice.

Express the grapefruit zest over the cocktail to release its oils, then use the zest as a garnish.