This game is no longer available, but you can play another ice creamer-making game that is here
Play Incredible Icecream Inventor game Online
Try any ingredient you like. Click on it, and then click on Add button or hold the Add button. Keep adding until the Make button is enabled.
Once you see the Make button shaking that means you cannot add any more ingredients. Just click on the Make button to prepare the ice cream.
This game is like Bartender the Right Mix where you prepare stuff and then taste it.