Pizza crust: Outer Core (molten).
http://www.sodahead.com/living/which-type-of-pizza-crust-do-you-prefer/question-854075/?page=2&link=ibaf&q=&esrc=s |
Sauce: Lower Mantle.
http://www.finecooking.com/recipes/no-cook-tomato-sauce-for-pizza.aspx |
Cheese: shallow mantle.
http://fitness2at.com/2013/01/25/so-whats-the-plan/cheese-pizza/ |
Toppings: crust and lithosphere.
http://www.cs.umb.edu/~rkotla/ |