Start: Go to Lumbridge Castle. Talk to the cook; tell him that you will help.
Items needed: Milk, Flour, Egg
Speak with the Cook at Lumbridge Castle's first floor. He will tell the player that he needs ingredients to make a cake for the Duke of Lumbridge's birthday. He wants the player to retrieve flour, milk, and an egg, and to bring those items back to him. Before you set off and collect your ingredients, pick up the pot that's sitting nearby on a table, which you will need later. You'll also want to purchase a bucket from the nearby General Store.
To obtain milk, you simply have to use a bucket on a Cow. A bucket can be found inside the chicken farm across the river north-west of Lumbridge, or you can simply purchase one from the General Store north of the castle. Cow's can be found by following the path that leads north-west out of Lumbridge.
Make sure you have a pot in your inventory. Now, to obtain flour, follow the path that leads north-west out of Lumbridge. Go past the chicken farm and you'll see a field of wheat. Right-click on one and pick it, you'll obtain grain. Now, go into the windmill beside the field and go to the top floor. Use the grain on the hopper, and then operate it. Go to the bottom floor, you should see a pile of flour in the center of the room. Simply use your pot on the pile of flour, and you now have flour in your inventory.
Eggs can be found to the north-east of Lumbridge. Cross the bridge going across river and follow the path north. After a little while, you will come across a chicken farm on the west side of the path. Beside the little coup is a single egg item spawn. Pick it up. Once you have all three ingredients, speak to the cook in the castle.
1 Quest Point
Cooking Experience = 300 x Custom Rate
Access to the Cook's Range in Lumbridge Castle