Potato of Knowledge

{
 "title": "Potato of Knowledge",
 "rows": [
 {
 "field": "<span style=\"white-space: nowrap;\"><span style=\"display: inline-block; background-color: #fff; border: 1px solid #888; border-radius: 0.3em; color: transparent; width: 1em; height: 1em; vertical-align: -0.36em; margin-right: -0.1em\"><br></span> </span> Common",
 "label": "(link to Rarity article, displayed as Rarity tier)"
 },
 {
 "field": "Yes",
 "label": "(link to Renewable resource article, displayed as Renewable)"
 },
 {
 "field": "Yes (16)",
 "label": "Stackable"
 }
 ],
 "invimages": [
 "Potato of Knowledge",
 "Potato of Knowledge (Amount 50)",
 "Potato of Knowledge (Amount 100)"
 ],
 "images": [
 "Poisonous Potato JE3 BE2.png"
 ]
}

A potato of knowledge is a joke item, added in 24w14potato.

Big brains mined by a player in Survival, or destroyed by an explosion, drop a potato of knowledge with the same amount of experience stored in it (If the big brain didn't have any experience, a potato with 0 knowledge is dropped). The maximum possible amount stored in a single potato of knowledge is equal to 1000 experience points; if a big brain absorbs this much experience, a potato of knowledge with 1000 experience is dropped by it automatically, without breaking the block.

In the Creative inventory, three preset types are available: potatoes with 10, 50 and 100 experience.

Players can use the item to consume it. Potatoes of knowledge do not restore any hunger when consumed; instead, it gives the player the amount of experience that it stored. Because this item is not actually food, it doesn't count for the "Husbandry" advancement.

It also doesn't inflict the Poison effect, despite using the poisonous potato texture.

Issues relating to "Potato of Knowledge" are not maintained on the bug tracker because it is an April Fools' joke, and is therefore not in the newest stable version or snapshot. Issues reported there are closed as "Invalid".