Short Answer:

Puff pastries should be reheated in an air fryer for 3–5 minutes at 170–180°C (340–350°F). This short cooking time warms the filling and restores the flaky, crispy texture of the pastry.

Check them halfway through and adjust slightly depending on size and filling. Reheating for too long can burn the outer layer, while too short a time may leave the center cold, so timing is important for perfect results.

Detailed Explanation:

Reheating Temperature and Time

For puff pastries, the ideal reheating temperature is 170–180°C (340–350°F). At this temperature, the hot air circulates evenly around the pastry, warming the filling while keeping the outer layers crispy and flaky. Cooking for 3–5 minutes is generally sufficient, depending on the size and thickness of the pastries. Small or thin pastries may only need 3 minutes, while larger or stuffed pastries may need up to 5 minutes.

Halfway Check and Adjustment
It is recommended to check puff pastries halfway through the reheating process. If needed, rotate or shake them slightly to ensure even heating. This prevents uneven browning and ensures that the outer layer becomes crisp while the filling heats uniformly. Adjust the time slightly depending on your air fryer model and how many pastries are being reheated at once.

Avoid Overheating
Overheating puff pastries can burn the outer layers and dry out the filling. High temperatures or extended reheating times may result in a pastry that is too dark, tough, or brittle. Using the recommended temperature and monitoring time carefully ensures that the pastries remain golden-brown, crispy, and flavorful.

Maintaining Crispiness
Air frying puff pastries without covering them preserves the crisp texture. Do not wrap them in foil or cover with a lid, as trapped steam can soften the pastry. Proper spacing in the air fryer basket allows hot air to circulate freely, helping to restore the flaky texture of freshly baked puff pastries.

Serving Tips
Serve puff pastries immediately after reheating for the best texture and taste. Delays in serving can allow condensation to form on the pastry surface, softening the exterior. A light spray of oil can be applied if the pastries appear slightly dry, which helps restore a golden finish without making them greasy.

Conclusion:

Reheating puff pastries in an air fryer for 3–5 minutes at 170–180°C ensures the filling is warmed and the pastry remains flaky and crispy. Checking halfway and proper spacing prevents sogginess or uneven heating, making reheated puff pastries taste fresh and enjoyable.