Southgate

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

Select and pre-chill an Old Fashioned glass.

Prepare a garnish of lemon zest twist.

Stir the straight rye whiskey, sugar syrup, and a dash of Underberg or Brasilberg with ice.

Strain the mixture into the pre-chilled glass filled with ice, preferably using a large cube or chunk of block ice.

Express the lemon zest twist over the cocktail and use it as a garnish.