This guide is relevant for current RuneScape and Old School.
To begin the quest, you should speak to the Cook in the kitchen of the Lumbridge Castle's ground floor. The Cook will tell you that he needs ingredients to make a cake. He needs the player to retrieve a bucket of Top-quality milk, a pot of Extra fine flour and a Super large Egg. After you have retrieved these items, you need to bring them back to the Cook.
To obtain the Top-quality milk, you need to get an empty Bucket and take it to a Prized dairy cow. The cow field is east of the River Lum, south of the chicken farm. Here, speak to Gillie Groats for some advice on getting the Top-quality milk. She will tell you to milk the Prized cow to the east of her, by the fence. There is a Bucket located next to the cow which you can use if you don't have one already.
To obtain the Extra fine flour, you need to firstly pick some wheat from the field to the North-West of Fred the Farmer, North of Lumbridge. Talk to Millie Miller at the end of the road heading North from the wheat field. Ask her about making Extra fine flour before heading up to the top of the windmill. If you don't have an Empty pot with you, Millie will kindly give you one to put your Extra fine flour in.
Next place some wheat into the hopper on the top floor of the windmill and then pull the leaver that controls the hopper. Head down to the ground floor of the windmill and collect the Extra fine flour from the bin. You will receive a pot of Extra fine flour.
There are two locations to get a Super large Egg near Lumbridge. Cross the River Lum, North-East of Lumbridge Castle and follow the path North. You will come across a chicken farm on the west side of the path. Take the Super large egg from here, or you can get another one from Fred The Farmer's Farm, located North of Lumbridge.
Now that you have all 3 items, head back to Cook who will be happy to offer you a reward.
Congratulations! Quest Complete!
Guide Made by: Doctor Shemp
Corrections submitted by: Doctor Shemp, DaDa, Andy, Yolk, Simon, Marc J, Panda, Rebecca, Majinvegito3, Valerie, SkillrzUnite, Mike H, Zammyskid, Danielle Girlz