L'Aristocrate
Lime zest twist (discarded)
SHAKE first 4 ingredients with ice and fine strain into chilled glass. TOP with champagne.

Special ingredient #1: Truffle salt
[['5 cl', 'Bacardi Gold rum'], ['1 cl', 'Vanilla sugar syrup'], ['2 cl', 'Lime juice (freshly squeezed)'], ['1⁄2 spoon', '*Special ingredient #1 (see above)'], ['Top up with', 'Brut Champagne']]
[['5 cl', 'amber rum'], ['1 cl', 'vanilla sugar syrup'], ['2 cl', 'lime juice'], ['1⁄2 spoon', '*special ingredient #1'], ['Top up with', 'brut champagne']]