Season the chicken: Pat thighs dry. Season all over with salt, pepper, and smoked paprika.
Let sit 10 minutes while you gather ingredients.
Sear for crisp skin: Heat olive oil and 1 tablespoon butter in a large skillet over medium-high. Place thighs skin side down and cook until deep golden and crisp, about 7–9 minutes. Flip and sear the other side 3–4 minutes.
Transfer to a plate.
Sauté the aromatics: Reduce heat to medium. Add remaining 2 tablespoons butter, garlic, and thyme. Cook 30–60 seconds until fragrant.
Do not brown the garlic.
Deglaze: Stir in white wine, scraping up browned bits. Simmer 1–2 minutes until slightly reduced. Add chicken stock, lemon zest, lemon juice, Dijon, and a pinch of red pepper flakes if using.
Simmer 2 minutes.
Make it creamy: Pour in heavy cream and stir. Bring to a gentle simmer. Taste and adjust salt and pepper.
Return the chicken: Nestle thighs skin side up into the sauce.
Reduce heat to medium-low and simmer uncovered 10–15 minutes, until chicken is cooked through (165°F) and sauce slightly thickens.
Finish and serve: Spoon sauce over the chicken. Garnish with parsley and a few thyme sprigs. Serve hot with your favorite sides.