Depending on your air fryer model, preheating might be necessary. Set the air fryer to 370°F (188°C) and let it run for about 2-3 minutes.

Remove the frozen White Castle burgers from the packaging. If they are in a twin pack, you can separate them easily with a butter knife.

For an extra crispy exterior, lightly spritz the frozen burgers with cooking spray on both sides. This step is optional, as the air fryer does a good job crisping the burgers even without the spray.

Place the frozen sliders in a single layer in the air fryer basket, ensuring they don't overlap. If you're cooking multiple burgers, you might need to do this in batches.

Set the air fryer to 370°F (188°C) again and cook the burgers for about 10-12 minutes. You don't need to flip them, but if you want a more even crispness, you can turn them halfway through.

At the end of the cooking time, check the burgers. They should be hot throughout with a crispy exterior. If needed, add another 1-2 minutes but watch closely to ensure they don't overcook.

Carefully remove the sliders from the air fryer (they'll be hot!) and serve immediately. They pair well with your favorite condiments, pickles, or any side of your choice.