Altoona-style pizza is popularly topped with what yellow processed cheese?

Altoona-style pizza is popularly topped with American cheese.

This distinctive pizza originated at the Altoona Hotel in Altoona, Pennsylvania, during the 1950s. Its unusual topping is a defining feature: yellow American cheese is placed over tomato sauce, salami, and sliced green bell pepper instead of the mozzarella or provolone more commonly associated with pizza.

The style also has a characteristic Sicilian-style dough, giving it a thicker, softer base than a typical thin-crust pie. Altoona pizza is usually cut into squares rather than the wedge-shaped slices used for many round pizzas. The salami and green pepper are traditionally positioned beneath the cheese.

Some descriptions mention Velveeta in connection with the original preparation, which can cause confusion. However, the popular identifying cheese for Altoona-style pizza is American cheese. The Altoona Hotel helped establish the style, and after the hotel was destroyed by fire in 2013, other local restaurants continued serving versions of the regional specialty.