Nothing could be easier than these flan mixes from Alsa. To prepare, bring half a liter (17 fluid ounces) of milk to a boil in a large pan. Once the milk has boiled, remove the pan from the heat and immediately add one sachet of flan mix, stirring briskly with a whisk. Pour the mix into one large or five individual ramekins and let cool a bit before placing in the refrigerator. The flans should be refrigerated for at least one and a half hours; they are best when served thoroughly chilled. Each box contains four sachets. Each sachet makes five servings.