Mix all shortbread crumbs, butter, and sugar in a medium bowl. After it is well combined, press into bottom and barely up sides of an 8 inch pie plate
beat cream cheese, caramel topping, and vanilla in a large bowl with electric mixer on medium speed until smooth.
Gradually beat in heavy cream just until blended.
Beat on medium-high speed 2 minutes or until fluffy. Spoon mixture into crust.
add whipped topping if desired.
Refrigerate 3 hours or until set.
When ready to serve, drizzle with additional caramel topping and sprinkle with shortbread crumbs.
Store leftover pie covered in refrigerator