This Dijon Spatchcock Chicken recipe involves flattening a whole chicken for even cooking and marinating it with a flavorful blend of Dijon mustard, lemon, garlic, rosemary, and olive oil before roasting it to perfection. The result is a juicy, tender chicken with crispy skin, perfect for impressing guests or elevating a weeknight dinner.
Preheat the oven to 425°F and coat a 12-inch cast iron skillet with 1 tablespoon of olive oil.
Create the marinade by blending the mustard, lemon zest and juice, garlic, seasonings, and olive oil in a high-speed blender until smooth.
Prepare the chicken by cleaning and drying it. On a large cutting board, lay the chicken with the head facing you. Using kitchen shears, cut out the backbone in a “V-shape” pattern towards the tailbone. Save the backbone for broth. Break the breastbone to flatten the chicken.
Generously coat the chicken with the marinade, including under the skin.
Cut the onion into large chunks, along with the lemon pieces from earlier. Place them in the skillet, then put the chicken on top.
Place the skillet on the center rack of the oven and bake for 1 hour or until the internal temperature reaches 165°F. Halfway through baking, baste the chicken with its juices.
Once cooked, remove from the oven and let rest for 10 minutes before cutting into pieces to serve.