Preheat the oven to 400 degrees.
Spray a 9 x 13 baking dish with cooking spray.
Grab some paper towels and divide into two small piles.
Wash and pat dry the chicken with paper towels and set aside. Wash your hands and dry with more paper towels.
Set up a dredging station and in your first shallow dish, add in all of the dry ingredients and whisk together with a fork.
In the next shallow dish, add in the milk, eggs, and mayo and whisk together.
Using thongs, dip a piece of chicken, skin side down, into the liquid mixture, the dredge the chicken into the dry, and place the chicken into the baking dish, skin side up.
Repeat that same process until all of the thighs are finished.
Add the butter and coconut oil (or oil of your choice) into a small microwave-safe dish and microwave in 15 second bursts until melted. Drizzle that mixture onto the top of the chicken.
Place the baking dish into the oven for 30 minutes.
At the end of the 30 minutes, turn the oven temperature up to 450 degrees and cook for an additional 10 – 15 minutes or until the chicken registers 165 – 170 on your meat thermometer.
Carefully remove the baking dish from the oven.
Serve and enjoy.