Espresso Rub 5 oz. A delicious and robust way to add a deep smoky flavor to steak and other grilled meats. The richness of the coffee also adds a dark, caramelized crust to the surface of the meat, helping to seal in natural juices, and bringing out the savory flavor. Although most often used on beef and pork, espresso rub can also be used on seafood and roasted vegetables. Ingredients: sugar, salt, pepper, espresso powder, onion, paprika and cayenne.