This drink is also known as a Papa Doble for good reason, it's twice the size of a regular cocktail. Hence the above recipe will fill one oversize Martini...
Been making this cocktail/recipe for years and it is wonderful any season, sipping one now 12.24.2020, don't forget the Luxardo gourmet-marachino cherries. The Commodore's House in NOLA serves a Papa Dople that is excellent, ordered mine in the kitchen bar, try it there.