Prep the chicken. Place the chicken breasts between two sheets of parchment and gently pound to an even 1/2–3/4 inch thickness.
This helps them cook evenly and stay tender. Pat dry with paper towels.
Season generously. In a small bowl, mix the salt, pepper, paprika, and garlic powder. Sprinkle evenly on both sides of the chicken.
If using, dust lightly with flour, shaking off any excess.
Preheat the oven. Set your oven to 375°F (190°C). You’ll finish the chicken in the oven to keep it juicy and to meld the flavors.
Sear for color and flavor. Heat the olive oil and 2 tablespoons of butter in a large oven-safe skillet over medium-high heat. When the butter foams, add the chicken.
Sear 3–4 minutes per side until golden. Transfer the chicken to a plate (it won’t be fully cooked yet).
Build the garlic butter. Reduce heat to medium-low. Add the remaining 3 tablespoons of butter to the skillet.
Stir in the minced garlic and red pepper flakes. Cook 30–60 seconds, just until fragrant. Don’t let the garlic brown.
Deglaze and brighten. Pour in the chicken broth and lemon juice.
Scrape up the browned bits from the pan—those are pure flavor. Simmer 1–2 minutes to slightly reduce and round out the sauce.
Return the chicken. Nestle the chicken back into the skillet and spoon sauce over the top. Scatter chopped parsley (or thyme) and add a few lemon slices if you like.
Finish in the oven. Transfer the skillet to the oven and bake 7–10 minutes, or until the internal temperature hits 165°F (74°C) at the thickest part.
Baste with the sauce once midway through if you remember.
Rest and serve. Let the chicken rest 3–5 minutes. Taste the sauce and adjust with a pinch of salt or an extra squeeze of lemon. Spoon sauce over each serving and garnish with more herbs.