This pie rocks...it's a keeper. The recipe was so easy and delicious. I followed the reviews of others by increasing the graham crackers to 9 (with a bit more butter) to fill a deep dish 9" pie plate, substituting 1 cup PB and 1/2 cup powered sugar for those horribly waxy and flavorless PB chips, substituting evaporated milk for the cream in the chocolate mixture to ensure a smooth consistency, and reserving a small portion of the chocolate mixture to drizzle on the top. Do not, as suggested by some reviewers, change the grahams to oreos -- too sweet; or decrease the amount of chocolate -- it's just right!