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The cook is Duke Horacio's personal cook. He usually seems unprepared, but with the player's help, he prepares great food. He is the starting point for the Cook's Assistant and Recipe for Disaster quests. He can be found in the Lumbridge Castle kitchen on the ground floor[UK]1st floor[US]. The cook has 4 children and a goat.
When the Cook's Assistant quest is completed, the player is granted use of his magical range, which has a lower chance of burning food compared to other ranges.
- The cook is the solution to the medium anagram clue: OK CO. He will present the player with a challenge scroll which asks, "How many cannons does Lumbridge Castle have?", the answer to which is 9.
- The cook is the solution to the beginner cryptic clue: In the place Duke Horacio calls home, talk to a man with a hat dropped by goblins.
- In the 20th Anniversary event, the Cook's recipe book is shown to be extremely crude. The Cook also admits to having burnt every single cake he ever attempted to bake in his life, explaining his constant need to ask adventurers to get him ingredients.