In a large bowl, whisk the heavy cream until stiff peaks form.

In another bowl, combine the granulated sugar, vanilla extract, and peppermint extract.

Add the melted dark chocolate to the sugar mixture and mix until well combined.

Gently fold in the whipped cream into the chocolate mixture until fully incorporated.

In a separate bowl, beat the egg whites until stiff peaks form, then fold into the chocolate mousse gently.

Spoon the mousse into elegant cups and refrigerate for at least 40 minutes before serving.

Top with whipped cream, chocolate shavings, and garnish with fresh mint before serving.