Cook's Assistant

A feast for a Duke
(If you don't want to go through the entire process the quest intends, just bring a pot of flour, a bucket of milk and and egg with you to complete the quest in seconds.)

To begin the quest, talk to the cook in the Lumbridge Castle's kitchen, which is on the ground floor. He tells you that it is Duke Horacio's birthday, and he is supposed to prepare a cake for the celebration, but he has forgotten to bring some of the ingredients required for the cake. Thus, he requires you to bring him a bucket of milk, an egg, and a pot of flour (pot is found on table).

Bucket of milk
A bucket of milk may be obtained from the Lumbridge cow field (east of Lumbridge, north of the entrance to the desert). Simply use a bucket on the dairy cow. You can get a bucket from the General Store for 2 gp. If you don't have the coins, just pickpocket a man. You can find a bucket by the chickens west of the cow pen aswell, inside the house.

Egg
To obtain an egg go west of the cow field and pick it up. It's in the chicken coop.

Pot of flour
To obtain a pot, get it from the table by the Cook in Lumbridge Castle. To obtain a pot of flour, you must go north of Lumbridge and follow the road until you get to the mill. Collect the wheat outside and go to the top floor, put the wheat in the hopper and then pull the lever. Back on the ground floor use your pot to collect it from the bin.

Delivery
To wrap up, take the ingredients back to the cook in the Lumbridge Castle. Speak to him for the final time to give him the ingredients.

Rewards

 * 1 Quest point
 * 300 Cooking experience
 * Permission to use the cook's range, which significantly reduces the chance of burning food.