When cooking, the order and temperature at which you add fats like oil and butter can significantly impact the texture and flavor of your food. Butter contains water and milk solids, which start to separate and evaporate quickly if added to a hot pan, causing unwanted splattering and rapid browning. Adding butter to a cold pan allows it to melt slowly, maintaining a smooth emulsion that distributes flavor evenly. On the other hand, cooking oils have a higher smoke point because they lack the milk solids found in butter. This makes them ideal for adding to a hot pan where quick, even heating is needed without burning. By adding oil first to a hot pan, it spreads easily and heats rapidly, providing a stable cooking surface while preventing food from sticking, especially on stainless steel pans. In my personal experience, following this technique helps me achieve a consistent sear on meats and vegetables without the mess of butter spattering or burning. I usually start by heating my pan, adding oil to coat the surface, then lowering the heat before incorporating butter to add rich flavor. This method also helps in making better sauces as the gradual emulsification of butter in the pan releases a savory aroma and creamy texture. Understanding the science behind these steps enhances both cooking technique and the final taste, making your kitchen efforts more successful and enjoyable.