Prepare your crust and press it into the base of a springform pan. Chill while you make the filling.
In a large bowl, beat the cream cheese, peanut butter, sweetener, and vanilla until smooth.
Pour in the melted white chocolate and mix until combined.
Fold in the whipped cream gently, keeping the mixture light and airy.
Spoon the filling over the crust and smooth the top.
Chill for at least 4 hours or overnight for best texture.
Slice and serve straight from the fridge.