The rich and layered texture of this dish mirrors the complex layers of secrets and revelations in Mrs. Blackwell's life.
Melt chocolate in a heatproof bowl set over a pot of simmering water.
Remove from heat and let cool slightly.
In a separate bowl, whip heavy cream to soft peaks.
In another bowl, beat egg whites and sugar until stiff peaks form.
Fold whipped cream and vanilla into chocolate, then gently fold in egg whites.
Divide into serving dishes and chill for at least 2 hours before serving.