Cook any number of a food item and make sure no zombies are serving. After determining the time it requires to finish cooking, change the system date and time to a value after it will be done. Resume the game and the food will be ready. Note: This also can be used to give your zombies energy or reanimating them.
Is there an easy way to level up and get money faster?
Answer from istinkatgames
You can do the following but it will turn your cafe green, marking you as a cheater. Just change the time of your device by going to Settings>General>Date & Time and changing the setting of 'Set Automatically' to OFF and manually change the time.