01 -
Trim sirloin steak of excess fat and gristle, then slice against the grain into 1/4-inch thick strips.
02 -
Whisk together soy sauce, Worcestershire sauce, brown sugar, garlic powder, onion powder, black pepper, and crushed red pepper flakes in a small bowl.
03 -
Combine beef strips with marinade, ensuring all pieces are coated. Cover with plastic wrap and refrigerate for at least 8 hours or overnight.
04 -
Drain beef and lay strips on a paper towel-lined tray. Pat each strip thoroughly dry with additional paper towels.
05 -
Place half of the beef strips in a single layer in the air fryer basket with space between pieces. Keep remaining strips covered and refrigerated.
06 -
Air fry beef strips at 200°F for 60 minutes, checking occasionally to ensure even drying.
07 -
Continue air frying at 200°F for an additional 60 minutes. Adjust cooking time as needed based on strip thickness and air fryer model.
08 -
Transfer finished jerky to a container and repeat the air frying process with the remaining marinated beef.
09 -
Allow jerky to cool completely, then store in an airtight container at room temperature for up to 2 weeks or freeze for up to 6 months.