I start by patting the chicken tenders dry with a paper towel, since excess moisture keeps the coating from sticking well. Then I season both sides generously with kosher salt and black pepper. If I'm using chicken breasts instead, I slice them into even strips first so they cook at the same rate.
Next, I whisk the eggs in one shallow dish until they're smooth and fully combined. In a second dish, I mix the panko breadcrumbs with the grated Parmesan cheese. I like to season this mixture with a little extra salt and pepper too, so every layer of the tender has flavor built in.
I dip each chicken tender into the egg wash first, letting any excess drip off before moving on. Then I press it into the breadcrumb mixture, coating all sides evenly. I find pressing gently with my fingers helps the crumbs really stick to the surface.
I place the breaded tenders in a single layer in the air fryer basket, making sure none of them are touching. If I'm cooking a bigger batch, I always split it into two rounds rather than crowding the basket. A light spray of cooking oil on the basket keeps things from sticking too.
I cook the tenders at 400°F for about 4 minutes, then flip them with tongs and cook for another 4 minutes. By the end, they should be deeply golden and crisp all over. I always check that the internal temperature has reached 165°F before pulling them out.
I serve these tenders right away while they're still hot and at their crispiest. Waiting too long lets the crust soften slightly, so I try to get them straight from the basket to the plate. A favorite dipping sauce on the side makes them even better.