Lay a chicken breast on a cutting board and cover with plastic wrap. Use a meat tenderizer, rolling pin or something similar to pound the chicken thinner in it's thickest spot until you have a pretty uniform thickness, about a centimeter or so. Slice in half. Repeat for the second chicken breast.
Add the chicken pieces to the milk mixture and marinate for 30 minutes to a couple of hours.
Mix together the flour and spices and lay out on a plate.
Lift a piece of chicken from the milk mix, letting the extra liquid drip off. Lay the chicken in the flour, turning and coating to completely cover the chicken in the flour. Use one hand as the wet hand – this hand will lift the chicken from the milk and place it in the flour. Use your other hand as a dry hand, this hand will pick up flour and press it into the chicken.
Heat a large skillet over medium to medium high heat. Coat the bottom of the skillet with a layer of oil.
When the oil is hot add the chicken. Fry on one side for 4-5 minutes. Flip and fry on the other side for 3-4 minutes or until crispy, browned and cooked through. Serve as is or on a bun for a burger.