Place hot dogs on a cutting board and use a knife to make diagonal slits on one side every inch or so (this is not required but helps with expansion and mimics grill marks). Put the hot dogs into the air fryer basket. For fresh hot dogs, air fry at 350F for 5 minutes. For frozen hot dogs, air fry at 330F for 7-8 minutes.

Using tongs, carefully lift each cooked hot dog out of the basket and place it into a hot dog bun. Then, add the bun and hot dog back to the air fryer. Repeat with all cooked hot dogs. Air fry at 350F for another 2-3 minutes until the bun is toasted and warmed.

The hot dogs are done with they are expanded, sizzling, and browning at the edges, and your bun is toasty and browning on the edges. Remove from the basket using tongs. Add your favorite toppings including mustard, ketchup and relish. I recommend making only as many hot dogs as needed. However, you can store leftover cooked hot dogs in the fridge for up to 4 days.