Preheat oven to 350 degrees F. Spray a 2-quart baking dish with cooking spray and set aside.
In a shallow bowl, stir together breadcrumbs, Parmesan cheese, and garlic powder.
Melt butter in a separate bowl.
One at a time, dip a chicken breast in the butter and then dredge the chicken breast in the breadcrumb mixture. Place the chicken in the prepared baking dish.
Repeat with remaining chicken.
Bake for 40-45 minutes, or until chicken is almost cooked through and crust is golden brown.
Remove chicken from oven.
In a medium bowl, whisk together cream of chicken soup and milk. Pour sauce over chicken. Return to the oven and bake, uncovered, for 15 more minutes, or until sauce is warm and bubbly.