Iridium Milk is a high-quality product obtained from cows that have been fed with Iridium-quality fodder or have naturally reached maximum happiness. This rare and valuable commodity significantly boosts energy and health when consumed, and it sells for a higher price than its lower-quality counterparts. It can also be used as an ingredient in various recipes or given as a gift to build relationships with the villagers, who generally appreciate its rarity and value.
The item ID for Iridium Milk is 803
This ID will work on PC/Mac (Steam), PS4, PS5, XBOX One, and Nintendo Switch.
Spawning items in Stardew Valley is a little unsual and is not done with commands. You will need to utilize what is called a cheat to set your character's or animal name to the item id. To do this you cannot use just the item id, you will need to surround the item id with brackets. Ex. [803]
Spawning Using the Animal MethodTo spawn Iridium Milk while using an animal, you will need to head over to Marine's Ranch and purchase an animal. Once you have have an animal chosen, name the animal with the item id with brackets like this [803] and you will receive the Iridium Milk item. This method can be done using an existing character and is convenient but will cost some gold every time you want an item.
Spawning Using the Character MethodTo spawn Iridium Milk while using a character, you will need to create a new character and name it with the item id with brackets like this [803]. You will then receive the Iridium Milk item when you speak to a villager. This method is easy and free but cannot be performed on an existing character and you will be stuck with that name unless its edited.