A cream pie is a type of pie or cake 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, peanut butter, 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. It is a one-crust pie. The crust may be a standard pie crust made with flour and lard, or one made from crumbled cookies or graham crackers.