1 stick of unsalted butter, softened
1 tsp kosher salt
1 tsp paprika
1/2 tsp pepper
1-1/2 tsp parsley
1/2 tsp ground rosemary
1-1/2 tsp garlic powder
Mix butter with all of the spices, place in fridge to harden. Rinse chicken and place breast side up in a baking dish, loosen the skin on the breast by sliding your hand under it. Take spoonfuls of the seasoned butter and place them under the skin until all of the butter is used. Cover the pan with foil and bake at 350 for 15 minutes per pound.
These are just the spices I used last night, you can use anything you like though.