Prep the Chicken: Place your whole chicken breast-side down, cut along both sides of the spine to remove it, score the sternum lightly, and season with salt and black pepper.

Flatten the Chicken: Flip the chicken so the breast side is up, press down on the breastbone firmly until you hear a crack.

Make Flavored Butter: In a bowl, combine softened butter and olive oil, add garlic, parsley, lemon zest, and juice, season with salt and pepper.

Apply Butter: Gently separate skin from the meat and spread the butter mixture generously under and over the skin.

Bake: Preheat oven to 425°F, place chicken on a baking sheet, and roast for about 40 minutes until the internal temperature reaches 165°F.

Rest: Remove from oven, let rest uncovered for 10 minutes before carving and serving.