Preheat the oven to 180°c and cook the cream puff for 4 mins. Take the cream puff out of the oven and leave at the room temperature for 30 mins. This ensures the cream inside will be defrosted. *Even if you don't leave the cream puff in the room temperature, you can enjoy it as "ice cream puff". Alternatively, defrost the cream puff in the fridge for 6 hours. Please consume the cream puff as soon as possible after defrosting.