A cream pie is a type of pie filled with a rich custard or pudding that is made from milk, cream, flour, and eggs. It can come in many forms, including vanilla, lemon, lime, banana, coconut, and chocolate. A constant feature of all cream pies is the whipped cream topping. The custard filling is related to the French crème patissière which is a key component of various French cakes and tarts.

Cream pies are often associated with comedians who use them as a gimmick in their routines. When used for show business purposes, cream pies are generally mock-up pies made from shaving cream, which resembles the real thing.

Some political activists have adopted the cream pie as a weapon of protest, to be thrown into the face of one’s unsuspecting opponent. Pieing is generally done in a very conspicuous, public place.