Which quality is NOT associated with a perfectly cooked final product?

The quality that is not associated with a perfectly cooked final product is a raw taste. A well-cooked dish, particularly when it comes to items like burgers or other meats, should not exhibit any rawness in flavor. Instead, it should be fully cooked, allowing the flavors to develop and enhancing the overall taste experience.

When a dish has a raw taste, it typically indicates that it has not been cooked through properly, which can lead to a subpar dining experience. In contrast, the other qualities mentioned — "melt in mouth," "firm on outside," and "mashed potato interior" (in the case of mashed potatoes or similar dishes) — are all desirable characteristics of well-prepared foods. These traits enhance texture, flavor, and overall enjoyment, which are essential for a final product that meets high culinary standards.