Pat dry 2 chicken breasts. Place the chicken in between two sheets of parchment paper, then pound the chicken to make it an even thickness with a meat pounder.
Mix together the paprika, onion powder, salt, and pepper in a small bowl. Then rub seasonings on chicken breasts.
In another small bowl make the glaze. Combine ketchup, honey, balsamic vinegar, and minced garlic.
Add chicken to a resealable plastic bag with half of the glaze, refrigerate and marinate for at least 2 hours.
When the chicken is ready, preheat the air fryer at 400 °F for 5 minutes.
Place the chicken in the basket and air fry at 380˚F/193˚C for 12 minutes, flipping chicken and brushing on remaining glaze halfway through cooking.
Make sure the chicken registers at 165 °F before enjoying! You can also pull out the temperature around 160 °Fand cover it in foil to let it come to temperature.