Liquid ingredients are substances that are in a fluid state, allowing them to flow and take the shape of their container. Common examples include water, milk, oil, and vinegar. These ingredients are often used in cooking and baking to add moisture, flavor, or to help combine other ingredients. In recipes, liquid ingredients play a crucial role in achieving the desired texture and consistency. For instance, water is essential for making dough, while milk can enrich the flavor of baked goods. Understanding how to measure and incorporate these liquids is key to successful cooking and baking.