01 - Lightly spray a microwave-safe mug with nonstick cooking spray to prevent sticking.
02 - Add angel food cake mix and water to the mug. Stir thoroughly until fully combined and smooth, ensuring no lumps remain.
03 - Place mug in air fryer basket. Cook at 320°F for 7–8 minutes until cake has risen and set in center. Test doneness with a toothpick—insert into center; it should come out clean.
04 - Carefully remove hot mug from air fryer. Let cool 1–2 minutes before serving. Top with whipped cream and fresh berries if desired.