Place chicken strips into a large, resealable plastic bag. Mix egg, buttermilk, and garlic powder in a small bowl. Pour mixture into the bag with chicken. Seal and refrigerate for 2 to 4 hours.

Mix together flour, bread crumbs, baking powder, and salt in another large, resealable plastic bag.

Remove chicken from the refrigerator; drain and discard buttermilk mixture. Place chicken in the bag with flour mixture; seal, then shake to coat.

Heat oil in a large, heavy skillet to 375 degrees F (190 degrees C).

Carefully place coated chicken into the skillet. Fry in hot oil until golden brown and juices run clear. Transfer chicken to a paper towel-lined plate to drain. An instant-read thermometer inserted into the center should read at least 165 degrees F (74 degrees C).