Pat the chicken breasts dry with paper towels to remove excess moisture, which helps achieve a better sear.
Generously season each chicken breast on both sides with salt, pepper, and smoked paprika, pressing the spices into the meat.
Heat a cast iron skillet over medium-high heat until shimmering—this should take about 2 minutes.
Add the oil to the hot skillet, swirling to coat the bottom evenly, and listen for a gentle sizzle as it heats.
Place the chicken breasts in the skillet, skin-side down if they have skin, and press gently to ensure contact with the surface.
Cook without moving for 5-6 minutes, until the underside is golden brown and releases easily from the pan.
Flip the chicken breasts using tongs, and cook for another 5-7 minutes, until the internal temperature reaches 74°C (165°F).
Once cooked through, transfer the chicken to a plate and tent loosely with foil, letting it rest for 3-5 minutes to retain juices.
Optional: add a tablespoon of butter to the skillet and swirl until melted, then squeeze fresh lemon juice over the chicken for brightness.
Slice the chicken against the grain, drizzle with the pan juices or butter-lemon mixture, and serve immediately for a juicy, flavorful meal.
Enjoy your perfectly seared chicken breast with your favorite sides!