Today, March 2, 2014, is National Banana Cream Pie Day. 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, 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 that is a key component of various Frenchcakes and tarts. It is a one-crust pie.