MTF Cookies

MTF Cookies are an unusual brand of baked snack that are most commonly found in candy stores and small supermarkets. The packaging is unbranded, and the cookies themselves are delivered through a shell company called BoingCo, with nobody outside of the company knowing exactly who bakes them or what they're made of.

Each cookie is a three-layered, pink-and-blue object made of two circular biscuits with an unknown middle filling. A pack contains twelve, with only one known flavour that seems to be called "Tasty!" in Japanese.

When consumed by a female (of any species) the cookie will simply taste average, with a few people even commenting that it's "like Oreos, but not as good". However, when consumed by a humanoid male, they'll instantly and temporary take on some equalities of a human female, including breasts, wider hips and more feminine features.

The amount of cookies consumed will dictate how notable the effects are, with a single cookie often leading to the consumer having only slightly smoother skin.