The preparation of cream puffs is a rather complex operation and the results are not so obvious, above all due to the difficulty in regulating the cooking temperature: therefore, empty cream puffs lend themselves perfectly to being the best allies of those who want to prepare desserts or even savory appetizers without too much difficulty. Empty cream puffs are generally purchased packaged, and they can be stored for up to three weeks, especially if it is done taking care that the container in which they are placed is tightly closed. To prepare cream puffs, the following ingredients are generally used: water, sugar, flour, salt, eggs and butter.