Add soy sauce, Worcestershire sauce, chile sauce, vinegar, sugar, cornstarch, and water and whisk along with the pepper powder.
3 tablespoon Soy Sauce, 2 to 3 tablespoon Worcestershire sauce, 1 teaspoon Chilli sauce, 1 tablespoon Apple cider vinegar, 2 teaspoon Sugar, 1 tablespoon Cornstarch or All purpose flour, ½ cup Water