The item in question is the Grand Master Chef, and you can either buy or build this new item to receive a 3x dish mastery bonus in your cafe. You can purchase the Grand Master Chef for 25 Cafe Cash, or you can build the item much in the same way as you build Super Stoves or the No Clean Fairy.
However, instead of showing up in the menu area at the bottom of the gameplay area, the only way to access the Grand Master Chef is to head into the functional section of the store (the gears) and click on the diamond there. You’ll see the Grand Master Chef Assembly item available with the words “Build It” underneath it. Drag this anywhere into your cafe and you’ll be charged NO coins. This does however trigger the beginning of your building the object.
From here, head back to your cafe and click on the Grand Master Chef Assembly base and you’ll see that you’ll need to collect 32 items in total, 8 each of 4 different ingredients: Magic Herbs, Secret Spices, Ancient Recipes, and Secret Scrolls.
You can either purchase these ingredients for 1 Cafe Cash per one individual ingredient, or you can ask your friends to help you by clicking on the “Ask for More” button associated with any one particular item. This will take you to a reverse of the game’s free gifts page, where you’ll send your friends individual requests, asking them to send you the part that you need.
Once you finish the Grand Master Chef, you’ll receive a 3x dish mastery bonus on all dishes that you cook. However, it needs to be made especially clear that this is not a permanent addition to your cafe. The Grand Master Chef will only be active for a span of a single week, or 7 days. While this will give you plenty of time to master at least one dish, it will be up to you as to whether or not you think it’s worth the process of building it, since it won’t remain active forever.
If you would like to build one, head over to the game’s page on Facebook to get started.