To make a large batch of this fruity cocktail, add all ingredients except the Prosecco to a pitcher. Add Prosseco to individual glasses just before serving.
For each drink, add 1 1/2 tsp. of the Framboise and 1/2 tsp. of the Campari to a champagne flute. Slowly pour in 1/2 cup of the Prosecco; stir gently. Add a sugar cube. If desired, serve with a wooden skewer threaded with raspberries.