Whisk buttermilk, mustard, 2 tsp salt, 1 tsp garlic powder, 1 tsp black pepper and hot sauce together in a bowl.  Add chicken, turn to coat well, cover and refrigerate at least 1 hour or overnight.
Toss cornflakes, bread crumbs and remaining 1/2  tsp of garlic powder, remaining 1/2  tsp black pepper, remaining 1/4  tsp salt, poultry seasoning, paprika, and cayenne in a zip top gallon bag.
To Freeze: Freeze in freezer safe container
To Reheat: Completely defrost chicken.  Heat oven to 400 degrees. Cover cookie sheet in foil.  Place wire rack on top and spray with nonstick spray. Place breading mixture in a bowl and drizzle 2 Tbsp oil over crumbs.  Toss until well coated.  Dredge chicken in crumb mixture and place on prepared rack.  Bake 35-40 mins.
