Mix water, salt, and sugar in a small bowl until dissolved to create a simple brine. Submerge the chicken breasts in the brine and let sit for 15 minutes to keep the meat juicy and tender.
Preheat your cast iron skillet over medium-high heat until it’s hot and starts to shimmer, about 3-4 minutes. Add a splash of olive oil and swirl to coat the bottom.
Remove the chicken from the brine, rinse briefly under cold water, and pat dry with paper towels. Season generously with salt, pepper, smoked paprika, and garlic powder if using.
Place the chicken breasts in the hot skillet. Sear for about 4-5 minutes without moving until the underside develops a deep golden brown crust and releases easily from the pan.
Flip the chicken using tongs, and sear the other side for another 4-5 minutes until the crust is golden and the internal temperature reaches 75°C (165°F).
Check the internal temperature with a meat thermometer inserted into the thickest part of the breast. Once it hits 75°C, remove the chicken from the skillet and let it rest for 5 minutes to redistribute juices.
Squeeze fresh lemon juice over the rested chicken for brightness. Serve slices with a dollop of herby yogurt on the side or drizzled over the top.
Enjoy your juicy, flavorful chicken breasts with your favorite sides or salads for a complete meal.