Golden Crutch

Chill an Old Fashioned Glass by filling it with ice and setting it aside.

In a separate mixing glass, add ice, then pour in the pisco, elderflower liqueur, and freshly squeezed grapefruit juice.

Stir the mixture until well chilled and integrated.

Taste and adjust the sweetness with simple syrup if necessary.

Discard the ice from the coupe and strain the cocktail into the chilled glass.