Add Angostura bitters, Whiskey, orgeat, and fresh lemon juice into your cocktail shaker. If you're using egg white, do your dry shake first. If you don't, add ice and shake the cocktail.
1.5 oz Angostura bitters, 1 oz Orgeat syrup, 0.75 oz Lemon juice, 1 egg white, 0.5 oz Rye Whiskey
Then double-strain the Trinidad Sour into a chilled glass.
You can garnish the cocktail with a twisted lemon peel.