01 - Lightly coat a microwave-safe mug with nonstick cooking spray, ensuring interior surfaces are evenly covered.
02 - Combine angel food cake mix and water in the prepared mug. Stir thoroughly until mixture is completely smooth and free of lumps.
03 - Place mug in air fryer basket. Cook at 320°F for 7-8 minutes until cake has risen and center is set. Test doneness with a toothpick—insert into center; it should emerge clean.
04 - Carefully remove hot mug from air fryer using oven mitts. Let cool 1-2 minutes before topping with whipped cream and fresh berries. Serve immediately.