Combine Scotch whisky, sweet vermouth, Angostura bitters, and simple syrup in a mixing glass.
Fill the mixing glass with ice and stir steadily for 25–30 seconds until well chilled and diluted.
Strain into a chilled cocktail glass.
Serve without garnish.
This is a stirred cocktail - not shaken. Shaking a spirit-and-vermouth build dilutes and aerates it incorrectly, clouding the drink and dulling the Scotch's nuanced smokiness. Always stir for clarity and texture.
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