First of all, beating the meat stuffing with a wooden hammer can destroy the muscle tissue in the meat and make the meat stuffing more delicate and soft. Through tempering, meat can absorb seasonings and sauces more easily, with richer flavor and better taste. In addition, the wooden hammer, like the pressure bar, makes the meat stuffing more uniform, makes each meatball similar and increases its ornamental value.
Secondly, beating meat stuffing with a wooden hammer also helps to improve cooking efficiency. In the traditional method, sometimes meatballs or hamburgers are "undercooked and unevenly cooked". By hammering, meatballs can be cooked more evenly and quickly.
Finally, according to some experienced chefs, beating the meat stuffing with a wooden hammer does not need to be stirred many times like the traditional stirring of the meat stuffing, which can effectively avoid excessive stirring of the meat, thus retaining more nutrients and making the meat stuffing more delicious.
To sum up, beating the meat stuffing with a wooden hammer can really make the meat delicate, taste better, improve cooking efficiency and taste more delicious, so this is probably why it is delicious.