Add cream cheese to a bowl. Using a hand mixer or stand mixer, mix until smooth. Add confectioner's sugar, vanilla extract, and salt and mix to combine. Set aside.
In a separate bowl, add heavy cream. Using the whisk attachment of a hand mixer or stand mixer, whip until medium peaks form. Gently fold whipped cream into cream cheese mixture until evenly incorporated.
Divide mixture into 8 small dessert glasses (about ½ heaping cup per serving). Optionally, garnish with fresh fruit and graham crackers.
Refrigerate for at least 1 hour, up to 24 hours, to allow mousse to chill and firm up. Serve cold.
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Notes
Do not skip the step of chilling: This firms up the mousse and changes the texture slightly.
Sweetness: This is a lightly sweetened, less sweet dessert. If you'd like a sweeter mousse, feel free to add another ¼ cup of confectioner's sugar.
Storage: Mousse will keep for 4-5 days in the refrigerator, but is best served within 1-2 days.
Garnish: If serving mousse more than an hour after preparing, add garnishes just before serving.