Preheat oven to 450 F. Ensure your whole chicken is entirely thawed, and set on the counter for 30 minutes before preparing to allow for even cooking
Add chopped onion, oranges, smashed garlic cloves & thyme + rosemary to the cavity of the bird
Add chopped thyme + rosemary, S&P to the room temperature butter and combine. Massage butter underneath the skin of the breasts and on the entire outside of the bird
Lay chicken in a large skillet or roasting pan and bake for about 1-1.5 hrs, until internal temperature has reached 165F
Let chicken rest for 20 mins at least before serving.