Adjust the oven rack to the upper-middle position and preheat the oven to 450°F (242°C). Then, line a rimmed baking sheet with a wire rack. Dry the chicken thoroughly with a cloth, and set it aside.
Add cumin, paprika, salt, pepper, garlic, vinegar, and oil to a small bowl and stir to combine.
Using a pastry brush, evenly distribute the mixture over the whole chicken.
Place the chicken in the middle of the wire rack. Roast for 35 to 45 minutes until the chicken reaches an internal temperature of 165°F (73°C).
Transfer the chicken to a cutting board and tent loosely with foil for 10 minutes.
Break down the chicken and serve with serrano crema.
Notes
Adapted From:
You'll find the original recipe and inspiration for this post in Kenji Lopez-Alt's book, The Food Lab.
Expert Tips:
You don't need to butterfly the chicken the way we do, though it is far easier than it seems. Butterflying or spatchcocking a chicken is the best way to ensure the chicken cooks evenly. If you don't want to butterfly the chicken, leave it whole and adjust the cooking time to 55 minutes.
If using a smaller chicken, the excess paste may build up on the chicken. If this happens, lightly brush the chicken with olive oil to serve.