In a mixing bowl, combine the Jiffy muffin mix with the egg and milk according to the package instructions. Stir until the batter is smooth and well combined.

Optionally, fold in any mix-ins such as chocolate chips, blueberries, or nuts to add extra flavor and texture to your muffins.

Lightly grease the wells of the air fryer basket or silicone muffin cups with cooking spray to prevent sticking.

Spoon the muffin batter into the wells, filling each one about two-thirds full. You may need to work in batches depending on the size of your air fryer.

Place the muffin-filled basket or muffin cups into the preheated air fryer. Make sure to leave some space between each muffin to allow for air circulation.

Air fry the muffins at 325°F (160°C) for 12-15 minutes or until they are golden brown on top and a toothpick inserted into the center comes out clean.

Once done, carefully remove the muffins from the air fryer and transfer them to a wire rack to cool for a few minutes before serving.

Enjoy your freshly baked muffins warm or at room temperature with your favorite toppings or spreads.