Ingredients: For the Coffee Soaking Mixture: 1 cup strong brewed coffee, cooled 2 tablespoons rum or coffee liqueur (such as Kahlua) For the Mascarpone Filling: 1 1/2 cups mascarpone cheese, at room temperature 1/2 cup granulated sugar 2 teaspoons vanilla extract 1 cup heavy cream, chilled 24-30 ladyfinger biscuits (savoiardi) For Garnish: Unsweetened cocoa powder, for dusting Dark chocolate shavings,