Season the chicken: Pat the chicken dry. Mix salt, pepper, paprika, and garlic powder, then rub it all over the chicken.
Sear it: Heat olive oil and 1 tablespoon butter in a large skillet over medium-high heat.
Add chicken in a single layer and sear 4–5 minutes per side until golden and cooked through (165°F/74°C). Transfer to a plate and tent with foil.
Make the garlic butter base: Lower heat to medium. Add 2 tablespoons butter to the skillet.
Stir in the minced garlic and red pepper flakes. Cook 30–60 seconds until fragrant, not browned.
Deglaze: Pour in chicken broth and lemon juice. Scrape up browned bits from the pan with a wooden spoon.
Simmer 2–3 minutes to reduce slightly.
Finish the sauce: Stir in thyme and parsley. Swirl in the final tablespoon of butter for a silky finish. Taste and adjust salt and lemon.
Coat the chicken: Return chicken to the pan and spoon sauce over the top.
Let it simmer 1–2 minutes so the flavors meld.
Serve: Top with extra parsley and a little lemon zest if you like. Spoon sauce over each piece when plating.