Par baking means partially cooking an empty pie crust that will be baked again when the filling is added such as this quiche. Blind baking refers to baking an empty pie crust before a filling is added. Blind baking is for pie crusts with fillings that do not need to be baked such as ice cream pies or cream pies. Both methods help to firm up the pie crust, which keeps the filling from seeping into it and making it soggy