The pizzas, distributed throughout the US, are being recalled after consumers reported that they had found small fragments of plastic on the CPK Crispy Thin Crust White pizza.
Nestlé said its investigation indicates this is directly related to a particular lot of spinach received from one of a supplier.
All the pizzas being recalled were produced during February and March of this year.
The voluntary recall is limited to: California Pizza Kitchen (CPK) Crispy Thin Crust White, UPC 71921 98745; production codes 3062525951, 3062525952 and 3063525951.
CPK Limited Edition Grilled Chicken with Cabernet Sauce, UPC 71921 00781; production code: 3059525952.
DiGiorno Crispy Flatbread Pizza Tuscan Style Chicken, UPC 71921 02663; production codes: 3057525922 and 3058525921.
DiGiorno pizzeria! Bianca/White Pizza, UPC 71921 91484; production code: 3068525951