Hello Alex. Cooking juicy chicken breasts in a skillet is actually very achievable once you understand a few key culinary principles.
First, chicken breasts are unevenly shaped, with a very thick end and a tapered thin end. If you place a whole breast directly into a hot pan, the thin side will dry out completely before the center reaches a safe temperature. To fix this, place the breast between two sheets of plastic wrap or parchment paper and gently pound the thickest part with a meat mallet, rolling pin, or heavy skillet until it is an even thickness of about half an inch to three-quarters of an inch. Alternatively, you can slice the breast horizontally into two thinner cutlets.
Second, make sure to pat the chicken thoroughly dry with paper towels before seasoning. Moisture on the surface creates steam, which prevents a nice golden crust from forming. Season generously with salt and your choice of spices. If you have ten to fifteen minutes to spare, letting the salted meat sit at room temperature helps the seasoning penetrate and draw moisture back into the fibers.
Third, preheat your skillet over medium-high heat with a tablespoon of oil that has a high smoke point, such as avocado or canola oil. Once the oil shimmers, lay the chicken in the pan. Cook undisturbed for about four to five minutes until a deep golden crust forms, then flip and cook the other side for another three to four minutes.
Finally, the most critical step is monitoring the internal temperature and letting the meat rest. Use a digital meat thermometer inserted into the thickest part and remove the chicken from the heat when it reaches 160 degrees Fahrenheit, as carryover cooking will bring it up to the safe target of 165 degrees. Transfer the cooked chicken to a plate and let it rest for five minutes before slicing so the juices can redistribute throughout the meat.
I hope this helps make your dinners much more enjoyable.