Lemon Lush With White Chocolate And Macadamia Nuts

vanilla wafer crumbs

chopped macadamia nuts (divided)

granulated sugar

[1 stick] butter (melted)

white chocolate chips

[8] oz cream cheese (softened)

powdered sugar

pure vanilla extract

[8] oz whipped topping (thawed or 4 cup sweetened fresh whipped cream, divided)

[3.4] oz boxes instant lemon pudding

whole milk

white chocolate bar (grated)