Method
- Add Angostura bitters to a sugar cube and drop it into a champagne flute.
- Pour in cognac.
- Gently add chilled champagne.
- Garnish with an orange slice and maraschino cherry.
About the Ruby Dutchess
A sparkling sour cocktail made with champagne, cognac, and bitters. The sugar cube balances the tartness of the bitters.