Prep the chicken: Pat the chicken dry. Season both sides with salt, pepper, garlic powder, and smoked paprika.
Pounding to an even thickness helps it cook quickly and evenly.
Sear the chicken: Heat the olive oil in a large skillet over medium-high heat. Add the chicken and sear 4–5 minutes per side, until golden and cooked through (internal temp 165°F). Transfer to a plate and tent loosely with foil.
Build the base: Reduce heat to medium.
Add the butter to the same skillet. When melted, add the minced garlic. Sauté 30–60 seconds until fragrant, stirring so it doesn’t brown.
Deglaze: Pour in the chicken broth.
Scrape up the browned bits from the pan—that’s pure flavor. Simmer 1–2 minutes to reduce slightly.
Make it creamy: Stir in heavy cream, Parmesan, and Dijon if using. Simmer gently for 2–3 minutes, stirring, until the sauce thickens enough to coat a spoon.
Keep heat moderate to prevent curdling.
Brighten: Add lemon zest and juice. Taste and adjust salt and pepper. The lemon lifts the richness and makes the garlic pop.
Finish: Return the chicken to the skillet and spoon sauce over the top.
Simmer 1 minute to warm through. Sprinkle with parsley and serve.