Aunt Agatha

Select and pre-chill an Old Fashioned glass.

Prepare an orange zest twist for garnish.

Shake the rum, freshly squeezed orange juice, pineapple juice, and freshly squeezed pink grapefruit juice with ice.

Strain the mixture into the ice-filled Old Fashioned glass.

Dash Angostura Aromatic Bitters over the surface of the cocktail.

Express the orange zest twist over the drink and use it as a garnish.