In the bowl of the stand mixer fitted with the whisk attachment or in a large mixing bowl using a hand mixer, beat cream cheese, and granulated sugar until no clumps are left.
Warm up raspberry purée in the microwave or a small saucepan and whisk gelatin mass until gelatin dissolved.
Pour raspberry purée mix into cream cheese and whisk for a few seconds.
In a separate mixing bowl, beat cold, heavy whipping cream until fluffy, but do not overbeat, or it will turn buttery.
Gently fold in about 1/3 of the whipped cream into the cream cheese mixture until fully combined. Add the rest of the whipped cream and mix again.
Spoon the mixture evenly between glasses or ramekins and refrigerate for at least 2 hours or overnight.
How to Make Whipped Cream Topping
In the bowl of a stand mixer fitted with the whisk attachment or in the large mixing bowl using an electric mixer, beat cold, heavy whipping cream and powdered sugar until stiff peaks form.
Pipe over mousse and decorate with fresh raspberries and fresh mint if desired.
Notes
Use homemade or store-bought raspberry puree. Do not substitute gelatin with agar or different ingredients. Mix gelatin with cold water.