First, select either Magic or Booster to be crafted to see the Exotic items needed to start crafting (see reference image below).
If you have all the necessary Exotic items required to craft, then drag the Exotic items into the crafting machine. After a specific amount of time, the Booster or Magic will be ready to be collected from Cooking Lab. Watch the video below for more info.
Note: Booster and Magic can be crafted instantly by spending Cash as well. Also, participate in Food Cart, Shopping Rush, and Kekoa's Adventure to earn Booster and Magic.