Combine 30ml bourbon, 30ml Fernet-Branca, 22.5ml fresh lemon juice, and 12.5ml rich sugar syrup (2:1) in a cocktail shaker.
Fill the shaker with ice and shake vigorously for 10–12 seconds until well chilled.
Fill an old-fashioned glass with crushed ice.
Double-strain the cocktail into the prepared glass over the crushed ice.
Garnish with a generous bouquet of fresh mint sprigs, pressing them lightly between your palms before placing to release their aroma.
Crushed ice is intentional here - it dilutes the drink gradually as you sip, taming Fernet-Branca's intensity over time and rewarding patience with increasing drinkability.
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