No you do not. You can make it from scratch. Dice up 1 pound of chicken breast or chicken thighs into 1-inch cubes. Toss the chicken with ½ teaspoon garlic powder, ½ teaspoon onion powder, and 1 tablespoon cornstarch. Cook the chicken in ½ inch of vegetable oil in a large skillet over medium heat until just cooked through (internal temperature 165°F). Drain on a paper-towel-lined plate and then proceed with the sauce directions.