Let the pie cool for at least 2 hours on a wire rack. I know—you want to dive in now. But cutting into a piping-hot pie is like opening a volcano: the filling will slide everywhere, and you’ll be left with a sad, collapsed crust. Patience here is the difference between dessert and pudding on a plate.
Bake From Frozen Apple Pie at Wendell Blakely blog
During this wait, you can prepare your emotional sidekicks: a scoop of vanilla ice cream, a drizzle of caramel, or a dollop of whipped cream. Some purists will judge you for toppings. Ignore them. They probably eat plain toast, too.