New Oreo cookies inspired by Marvel’s Doctor Doom are headed to store shelves, and they do more than satisfy a sweet tooth.

The new limited-edition “Marvel Stuf of Doom” Oreos feature chocolate graham cookies with toasted marshmallow creme and a color-changing filling that turns your tongue green when licked. Each cookie is embossed with Doctor Doom’s iconic mask.

The collectible packages showcase comic-style artwork of Doctor Doom illustrated by Marvel Comics artist Todd Nauck. Fans can combine the fronts of all four special-edition Marvel Oreo “Stuf of Legends” and “Stuf of Doom” packs to form a continuous poster celebrating the Marvel and Oreo crossover universe.