Marinate: In a big zip bag or bowl, whisk buttermilk, brown sugar, salt, pepper, paprika, garlic & onion powder. Submerge chicken. Chill 8–24 hours (overnight is perfect).
Preheat: Take chicken out 30 minutes to lose the chill. Heat oven to 425°F. Set a rack over a rimmed pan.
Prep to roast: Shake off excess marinade. Tuck wingtips. Stuff lemon & thyme if using. Brush with melted butter/oil.
Roast hot: Place breast-side up; roast 20 minutes, then lower heat to 375°F and cook 35–45 minutes more, until thigh hits 165°F.
Rest & carve: Rest 10–15 minutes so the juices settle. Carve and plate with the pan juices.
Bubba’s Tips
Dry skin = crispy skin. Pat that bird real good.
Pan veggies (taters, carrots, onion) under the rack catch drippin’s and make themselves useful.
Storage
Fridge: 3–4 days (airtight).
Leftovers: Shred for sandwiches, pot pie, or chicken & rice.