Score the outside of the apples, creating a grid pattern. In a bowl, combine the cream cheese, egg yolk, sour cream, salt, vanilla, zest, and pastry cream powder. In another bowl, whip the egg whites using an electric mixer on medium speed and gradually add the sugar until it creates stiff peaks, about 5 minutes. Fold into the base.
Fill the apples with the soufflé mixture. Bake until the apples are tender and the soufflé has risen, about 20-25 minutes. Garnish with powdered sugar and serve each apple warm with 1 tablespoon cranberry sauce and 1 tablespoon crème fraîche.