The primary ingredient in pudding varies depending on the type, but for traditional British-style pudding, the key ingredient is generally milk or cream. In many recipes, cornstarch or flour is also used as a thickening agent, while sugar enhances the sweetness. Puddings can be sweet or savory and come in various forms, including custards, desserts, and even bread-based puddings. Sweet puddings often feature flavors like chocolate, vanilla, or caramel, while savory options might include meat or vegetables. Pudding is versatile and enjoyed in many cultures, often served as a comforting dessert.