6 sugar cubes
3 teaspoons aromatic bitters
1 bottle (750 ml.) brut Champagne or sparkling wine, chilled (see Notes)
Put a sugar cube into each of 6 Champagne flutes or wineglasses. Douse each cube with 1/2 tsp. bitters. Top with Champagne and serve immediately.
Note: Nutritional analysis is per cocktail.