Add toppings (chopped/crushed candy and drizzles) to the peanut butter pie at any point after it's set; i.e.; add after five hours and return to the refrigerator, or add and serve immediately. If the pie has been frozen, let it sit at room temperature for 20 minutes or so after adding the toppings to soften up a bit before serving (slice while still firm), or return to the fridge.