What ingredient weighs 1.5 oz in a Mexican pizza?

The ingredient that weighs 1.5 oz in a Mexican pizza is ground beef. This specific weight is part of Taco Bell's standard recipe for their Mexican pizza, where the ground beef provides both protein and flavor, contributing to the overall taste profile of the dish. The careful measurement of ingredients like ground beef ensures consistency and quality across all servings.

In terms of composition, ground beef not only plays an essential role in the Mexican pizza but is typically used in a way that balances well with the other ingredients, including the sauce, cheese, and crust. The other options, while also common ingredients in various Taco Bell menu items, do not match this specific weight in the context of the Mexican pizza. For example, shredded chicken and shredded cheese have different weight specifications according to Taco Bell's menu standards, as does the beans ingredient. These distinctions are crucial for maintaining the brand's commitment to consistency in their food preparation and serving sizes.