Pat dry and season: Pat the chicken thighs very dry with paper towels. Season both sides with salt, pepper, and smoked paprika.
Dry skin means better browning.
Sear the chicken: Heat olive oil in a large skillet over medium-high. Place chicken thighs skin-side down and cook without moving for 6–8 minutes, until the skin is deep golden and crisp. Flip and cook 4–5 minutes more.
Transfer to a plate; tent loosely with foil.
Pour off excess fat: Carefully spoon off all but about 1 tablespoon of fat from the pan. Keep the browned bits—they’re flavor gold.
Sauté garlic and herbs: Add butter to the skillet. Once melted, add minced garlic and Italian seasoning.
Cook 30–60 seconds, stirring, until fragrant. Don’t let the garlic brown.
Deglaze: Pour in chicken broth and scrape up the browned bits with a wooden spoon. Let it simmer for 1–2 minutes to reduce slightly.
Build the sauce: Reduce heat to medium-low.
Stir in heavy cream, Dijon (if using), and a pinch of red pepper flakes. Simmer gently for 2–3 minutes, stirring often.
Add Parmesan: Sprinkle in the Parmesan gradually, stirring until fully melted and smooth. Taste and adjust salt and pepper.
The sauce should be creamy and well-seasoned.
Return chicken to pan: Nestle thighs into the sauce, skin-side up, along with any juices. Simmer on low for 8–10 minutes, until the chicken reaches an internal temperature of 175°F and the sauce slightly thickens.
Finish with lemon: Stir in lemon juice to brighten the sauce. It keeps the dish from feeling heavy and balances the richness.
Garnish and serve: Top with chopped parsley and extra Parmesan.
Serve with mashed potatoes, buttered noodles, rice, or roasted veggies.