beef jerky recipe

- 1 1/2 pounds lean beef (such as top round or sirloin), thinly sliced against the grain - 1/4 cup soy sauce - 1/4 cup Worcestershire sauce - 1 tablespoon brown sugar - 1 teaspoon smoked paprika - 1 teaspoon garlic powder - 1 teaspoon onion powder - 1/2 teaspoon black pepper - 1/2 teaspoon salt - 1/2 teaspoon chili flakes (optional, for a bit of heat)