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The latest flavor of Oreos is decidedly Easter inspired, combining the classic cookie with a Peeps flavor.

For those who aren’t familiar with the nearly neon treat, Peeps are marshmallows covered in colored sugar.

The limited edition of the Peeps-flavored Oreos are producing some less-than-delicious side effects.

Consumers who have tasted the cookie — which has a bright pink filling — are reporting the colored cream is changing the hue of their tongue, mouth and feces to a vivid shade of pink.

https://twitter.com/Elliegreentea/status/836515076085436417

Reminder: Peeps Oreos taste much better than Switch cartridges, plus they turn your mouth bright pink. https://t.co/lutVk6zDgL pic.twitter.com/WBQZcaxpYZ — Kotaku (@Kotaku) March 3, 2017

Fans of the treat are taking to Twitter to share the surprising reaction.

Coincidentally, Monday was National Oreo Cookie Day, according to the Oreo Cookie Twitter account.

Happy Birthday @Shaq! Dunking an Oreo cookie is way easier than dunking a slice of cake #NationalOreoCookieDay — OREO Cookie (@Oreo) March 6, 2017