What is the purpose of a rub when preparing barbecue?

The purpose of a rub in barbecue preparation is primarily to enhance flavor and create a crust on the meat. A rub is a mixture of spices, herbs, and sometimes sugars that adheres to the surface of the meat. When applied before cooking, the rub not only infuses the meat with a deeper flavor profile but also caramelizes during the cooking process, forming a desirable crust known as the "bark." This bark adds texture and depth to the overall taste of the barbecue, creating an enjoyable eating experience.

In contrast, while tenderizing meat can be a goal in some cooking methods, a rub typically focuses on flavor enhancement rather than tenderness. Although rubs may contain certain ingredients that could have some tenderizing effects over time, their primary function is not to tenderize but to season. Additionally, increasing cooking time is not a purpose of a rub; instead, the cooking method, temperature, and type of meat play a more significant role in determining cooking duration. Lastly, while a rub may create a barrier that can help reduce the risk of burning, the primary function remains focused on flavor enhancement and crust formation rather than protection from burning specifically.