Mix wet ingredients together. Add buttermilk, hot sauce and salt together in a large bowl and mix then set aside.
Slice chicken breasts into thin pieces then use a meat mallet or meat tenderizer to pound out the boneless chicken breasts.
Add your sliced chicken breasts to the buttermilk mixture. Let them marinate in the fridge for at least an hour up to overnight.
Once you're ready to cook, pull the chicken from the fridge and let it sit out for about 30 minutes to lose its chill.
Meanwhile, preheat oven to 425 degrees F.
While your oven is preheating, make the breadcrumb mixture. Combine the panko bread crumbs, the parmesan cheese, and garlic powder in a shallow bowl and stir.
When the oven is hot, remove each piece of chicken from the buttermilk brine and gently shake off to remove extra marinade.
Place one piece of chicken at a time in the panko bread crumb mixture and coat it evenly; pressing into the panko to make sure that it's really on there!
Place a wire rack on top of a sheet pan or rimmed baking sheet.
Add the breaded chicken cutlets on top in a single layer. Be sure that the pieces don’t crowd each other so they can get evenly golden brown.
Before baking, drizzle each piece of chicken with a tiny bit of olive oil or a few squirts of cooking spray. Then place in the center rack of the preheated oven.
Bake for about 20-25 minutes or until the internal temperature of the chicken reads 165 degrees F, and the exterior is golden brown and crispy.
Remove the chicken from the oven. Then let the chicken rest for 5 minutes before serving.