Serendipity (by Colin Field)

Use 2:1 rich simple syrup for its listed portion.

Muddle the fresh mint leaves gently in an Old Fashioned glass to release their aroma.

Add the Calvados or your choice of apple brandy or straight applejack, ensuring its rich apple character shines through.

Pour in the cloudy and unsweetened apple juice or cider, which will provide a refreshing, tart balance.

Incorporate the rich sugar syrup, balancing sweetness with its concentrated flavor.

Shake these first four ingredients with ice, imbuing the blend with a chill.

Fine strain the mixture into the Old Fashioned glass filled with fresh ice, allowing only the smooth liquid to flow through.

Finish by topping the cocktail with brut champagne or sparkling wine, adding effervescence and a celebratory touch.