Mary doesn't make pie crust. She usually buys it pre-made.
The Earth has an outer silicate solid crust, a highly viscous mantle, a liquid outer core and a solid inner core.
the earth's crust
The snow crust after a good frost is very tough
Only the crust can caramelize. It's the only place that gets hot enough.
There's a skeleton choking on a crust of bread.
Under Europa's icy crust might be water ocean.
You must love the crust of the earth on which you dwell more than the sweet crust of any bread or cake; you must be able to extract nutriment out of a sand heap.
A crust eaten in peace is better than a banquet partaken in anxiety.