Spray a pie pan with non stick cooking spray. Pour the crushed vanilla wafers and melted butter into the pie pan and mix until well combined. Firmly press the wafers onto the bottom and up the sides of the pie pan. Set aside.
In a medium bowl, beat together the cream cheese with the vanilla extract until light and fluffy (2-3 minutes). Fold in the whipped cream. Fold in 1 cup of the chopped Twix candy.
Spread filling into prepared crust, smoothing out the top. Chill for at least 3 hours, until pie has set.
Before serving, top pie with remaining Twix and drizzle with chocolate and caramel sauce.
NOTE: Cook time listed is actually time the pie needs to chill before serving.