Prepare the Chicken: Remove the chicken thighs from the refrigerator. Using paper towels, pat the skin side extremely dry. Moisture is the enemy of crispiness; the drier the skin, the better the sear. Season both sides with salt and pepper if desired.
Heat the Pan: Place a large heavy-bottomed skillet or cast-iron pan over Medium heat. Add the 1–2 tablespoons of butter and allow it to melt until it begins to foam and bubble.
The First Sear: Carefully place the chicken thighs into the pan, smooth-side (skin-side) down. You should hear a distinct sizzle. Cook undisturbed for 5–7 minutes.
The Flip: Using tongs, try to lift a corner of the chicken. If it resists, wait another minute. Once the skin is deep golden brown and the meat releases easily from the pan surface, flip the thighs over.
The Finish: Continue cooking on the second side for 7–10 minutes, depending on the thickness of the thighs.
Check for Doneness: The chicken is fully cooked when the meat is firm to the touch and the juices run clear when pierced with a knife. For precision, use an instant-read thermometer to ensure the internal temperature has reached 165°F (74°C).
Rest: Transfer the chicken to a plate and let it rest for 3–5 minutes before serving. This allows the juices to settle so they don't run out when you bite into the meat.
Storage: Store leftovers in an airtight container in the refrigerator for up to 4 days.
Reheating Tip: To keep the skin crispy, reheat the thighs in an air fryer at 375°F for 4 minutes or in a dry skillet over medium heat.