Mix the butter, parsley, spinach, salt, and black pepper in a small bowl. Divide the butter into two portions, and then place it into the freezer until frozen solid.
Then use a meat mallet and pound your chicken breasts until about 1/2 inch thick. In the center of the chicken breast, add 1 of the packets of herb butter.
Wrap the chicken around the butter. Using saran wrap, wrap the chicken up and then place it into the freezer until frozen solid. (about 20 to 30 minutes)
When your chicken is done, freeze set up your dredging stations. In one bowl, whisk the eggs. In another bowl, mix the bread crumbs.
Place your chicken into the egg mixture and then into the breadcrumb mixture.
As you coat your chicken, place them into the air fryer basket. Set the temperature to 370 degrees F, air fryer setting for 10 minutes, flipping the chicken halfway.
Check, with a meat thermometer, the internal temperature of the chicken before removing it. The internal temperature should reach 165 degrees F. Plate, serve, and enjoy!