01 - Lightly coat a microwave-safe mug with nonstick cooking spray to prevent sticking.
02 - Combine angel food cake mix and water in the prepared mug. Stir thoroughly until completely smooth and no lumps remain.
03 - Place the mug in the air fryer basket. Cook at 320°F for 7-8 minutes until the cake has risen and set in the center. Insert a toothpick to test for doneness—it should come out clean.
04 - Carefully remove the hot mug from the air fryer. Let cool for 1-2 minutes, then top with whipped cream and fresh berries if desired. Serve immediately.