Champagne Cocktails For a real festive fizz, add the champagne to this cocktail mixture just before serving.. Ben Dearnley & Cath Muscat Champagne Cocktails recipe, on MiNDFOOD. By Dixie Elliott | November 24, 2008 Serves 8 ¼ cup lime (or lemon) juice ¼ cup pink grapefruit juice 1 tbsp Cointreau 750ml bottle champagne Put 2 tsp lime juice, 2 tsp grapefruit juice and ½ tsp Cointreau into each champagne flute. Fill flutes with champagne. Serve immediately. For Dixie’s cooking advice head to the Ask the Chef page.