The item ID for Truffle in Stardew Valley is:
The above cheat code applies to all platforms including PC/Mac (Steam), XBOX One, PS4 and the Nintendo Switch.
Spawning items in Stardew Valley is not done via commands, but rather through a cheat in which you must set your character's name, or the name of an animal, to the item code of the item you wish to spawn surrounded by [ and ].
To spawn this item using an animal's name, visit Marnie's Ranch, speak to Marnie and purchase an animal (we recommend a chicken as it is cheapest). Name the animal  and press OK. You will then receive the truffle item.
You can only set your character's name once, at the start of the game (when you create your world), for this reason we recommend you use the animal name method. If you do wish to use this method, first set your character's name to  when creating your save. Whenever you speak to a villager that says your name in dialogue (for example Gus at the Stardrop Saloon) you will be given the truffle item.
If you need more help with spawning truffle, we have a detailed guide on our blog - click here to visit that page.
Truffles can only be spawned on The Farm by pigs when they're not inside the Barn. They're required for the Chef's Bundle and to craft Truffle Oil. Note that an Oil Maker is required to craft Truffle Oil with truffles.
A gourmet type of mushroom with a unique taste.