I made this up at a recent BBQ and it was an amazing experiment. No butter was required in this very flavorful recipe.
I made this up at a recent BBQ and it was an amazing experiment. No butter was required in this very flavorful recipe.
Grilling corn coated in a sauce containing hoisin and oyster sauces requires careful heat management because these condiments contain significant amounts of added sugars and starches. Sucrose and complex carbohydrates caramelize rapidly when exposed to direct heat exceeding 300 degrees Fahrenheit, shifting quickly from golden-brown to charred and bitter. Brushing the glaze onto the kernels incrementally during cooking prevents the sugars from sitting directly over the flame long enough to carbonize completely. Applying thin layers allows moisture from the corn kernels to evaporate steadily while the exterior thickens into a glossy coating.
Red wine vinegar introduces acetic acid into the marinade, which breaks down surface proteins on the corn kernels through mild denaturation. This process alters the molecular structure just enough to help the umami-rich compounds from the soy and oyster sauces adhere more evenly to the starchy surfaces. Whisking the black pepper and garlic powder thoroughly into the liquid ensures that hydrophobic flavor compounds suspend uniformly rather than clumping together in pockets of oil or moisture.
Grilling causes internal water inside each kernel to turn into steam, creating pressure that plumps the cell walls for a crisp-tender bite. Excessive cooking time destroys this internal turgor pressure, turning the kernels tough and shrivelled as cellular moisture escapes into the atmosphere. Turning the ears every five minutes balances surface caramelization with internal steam retention, yielding tender corn without scorched spots.