Oreo has dropped a collaboration with Lucasfilm featuring special edition Star Wars sandwich cookies. Fans will be able to buy packs of the classic treat representing either the light side or dark side of the Force.

The fun catch? You won’t know which side you’ve got until you actually open the package. Each pack will feature one of two different color fillings: red for the dark side and blue for the light side—both infused with “kyber” sugar crystals inspired by lightsaber cores. The Oreos also feature heroes or villains embossed on the cookies themselves, with characters like Darth Vader, Darth Maul, and a stormtrooper representing the dark side, and Luke Skywalker, Yoda, and Princess Leia representing the light side. In total, there will be 20 iconic characters featured.

The limited time Star Wars Oreo cookie packs will be available for presale starting May 30 at Oreo.com/StarWars and they will begin rolling out at retailers nationwide June 10. Take a look at the designs in the gallery ahead!