Start by flattening the chicken breasts to ensure even cooking. You can do this by placing them between two sheets of plastic wrap and gently pounding them with a meat mallet or rolling pin until they are about 1 inch thick.
In a shallow dish, combine the all-purpose flour, salt, black pepper, and garlic powder. Dredge each piece of chicken in the flour mixture, ensuring they are well-coated.
In a large skillet, melt the butter over medium-high heat. Once melted and bubbling, it’s time to add the chicken.
Carefully add the coated chicken breasts to the skillet. Cook for about 3-4 minutes on each side, or until they are golden brown and cooked through. The internal temperature should reach 165°F (75°C).
Once the chicken is cooked, add the lemon slices to the skillet. Cook for an additional minute, allowing the lemon to caramelize slightly and infuse the chicken with its tangy flavor.
If desired, sprinkle fresh thyme over the top for an added touch of flavor. Serve the chicken hot, drizzled with the buttery lemon sauce and accompanied by your favorite sides.