01 - Melt 7 oz chopped dark chocolate in a microwave-safe bowl or over a double boiler until completely smooth. Using a pastry brush or spoon, coat the insides of 6 silicone or paper cupcake liners with melted chocolate, creating an even layer approximately 1/8 inch thick. Place the liners on a tray and chill in the refrigerator for 20 minutes, or until completely set. Once firm, carefully peel off the liners, leaving you with perfectly formed chocolate cups.
02 - In a microwave or double boiler, gently melt 3.5 oz dark chocolate and let it cool slightly for 2-3 minutes. In a chilled bowl, whip the heavy cream with powdered sugar and vanilla extract until soft peaks form. Fold a spoonful of whipped cream into the melted chocolate to lighten the mixture, then gently fold the chocolate mixture into the remaining whipped cream until fully combined and smooth.
03 - Pipe or spoon chocolate mousse into each chocolate cup, filling about two-thirds full. Garnish generously with fresh berries, chopped nuts, mini marshmallows, chocolate curls, and edible gold decorations as desired for an elegant presentation.
04 - Refrigerate the assembled cups for at least 20 minutes to allow flavors to meld and mousse to set properly. Serve chilled for optimal texture and flavor experience.