Hey Sugar
Sprinkle dried rose blossom on the surface of the cocktail
Drip one drop of bitters on each side of the sugar cube plus 2 more drops on the last face [one each for luck]. Drop the bitters-soaked sugar cube into a chilled glass, then pour other ingredients over cube.
[['1 cube', 'Sugar cube'], ['6 drop', "Difford's Margarita Bitters"], ['1 cl', 'St-Germain elderflower liqueur'], ['12 cl', 'Brut Champagne']]
[['1 cube', 'sugar cube'], ['6 drop', "difford's margarita bitters"], ['1 cl', 'st-germain elderflower liqueur'], ['12 cl', 'brut champagne']]