Blueberry pie is a pie with a blueberry filling. Blueberry pie is considered one of the easiest pies to make because it does not require pitting or peeling of fruit. It usually has a top and bottom crust. The top crust can be a circular crust but the pie can also have a crumble crust or no top crust at all. Blueberry pies are often eaten in the summertime because that is when blueberries are in season.