@wwotp, you need to have 30 pieces of Energy, one Book, and 30 Craft Coins (if you have enough, the recipe pieces stop being transparent and turn white). Then you hit "Activate" to activate the
recipe. Afterward, you'll have a
booster (Doubler),
whcih you will have to
activate separately. As soon as you activate the booster, you'll have 8 hours to use it (the deadline for the booster is displatyed on the panel next to the bookmarks)