The episode was written and storyboarded by Bert Youn and Sean Jimenez, from a story by Merriwether Williams and Tim McKeon.

In this episode, Tree Trunks joins Finn and Jake who go on a quest to fulfill her desire of picking a proposed legendary "crystal gem apple" in an evil forest.

Tree Trunks was voiced by Polly Lou Livingston, a friend of series creator Pendleton Ward's mother.

The group begins talking about what they wish they could do if they could achieve anything, and Tree Trunks notes that she wants to pick the rare Crystal Gem Apple, which is located in the Evil Forest.

When they reach the Evil Forest, they encounter a wall of flesh and try to fight it, but because Tree Trunks is naive, she begins putting stickers on it.

Finn goes to fight it, but Tree Trunks' "adventurer's instincts" tell her to put on makeup and seduce the brain beast with her womanly charms.

Jake has to leap in to save Tree Trunks while Finn attacks the monster's magic gem weak spot.

Unfortunately, a Crystal Guardian appears and begins copying Finn and Jake's actions, blocking every attempt to fight it physically.

"Tree Trunks" was written and storyboarded by Bert Youn and Sean Jimenez from a story by Merriwether Williams and Tim McKeon, and directed by Larry Leichliter.

[12] Francis Rizzo III of DVD Talk rhetorically asked, "If anyone would like to explain just what the hell happened at the end of 'Tree Trunks' I'm all ears.

[14] The review also praised the "priceless" twist ending, calling it "the absolute best moment in the episode and one of [their] personal favorites in the entirety of Adventure Time".