Crispy Fried Chicken Sandwiches

Name: Crispy Fried Chicken Sandwiches
Prep time: 30 min
Cook time: 20 min
Total time: 50 min
Cuisine: American
Ingredients: 3 boneless, skinless chicken breasts (about 1⅓ pounds); 2 cups cold water; 2 tablespoons plus ¾ teaspoon salt; 2 teaspoons sugar; 4 to 6 cups vegetable or peanut oil, for frying; 1 large egg; ½ cup milk; 1½ cups all-purpose flour; 3 tablespoons cornstarch; 1½ teaspoons baking powder; ¾ teaspoon garlic powder; 1 tablespoon freshly ground black pepper; 1 teaspoon Accent flavor enhancer (see note); 1 teaspoon paprika; ½ cup best-quality mayonnaise, such as Hellmann's or Duke's; 3 tablespoons store-bought barbecue sauce; 2 teaspoons Dijon mustard; 6 hamburger buns; Bread-and-butter pickles