Preheat and prep. Heat the oven to 425°F (220°C). Pat the chicken thighs dry with paper towels. Dry skin equals better browning and crispier edges.

Season the chicken. Sprinkle both sides generously with kosher salt and black pepper. Let the thighs sit at room temperature for 10–15 minutes while you make the sauce.

Make the maple Dijon sauce. In a bowl, whisk together maple syrup, Dijon mustard, whole-grain mustard (if using), apple cider vinegar, minced garlic, thyme or rosemary, smoked paprika, and red pepper flakes. Taste and adjust salt and pepper as needed.

Sear for texture. Heat an oven-safe skillet (cast iron works best) over medium-high heat. Add a tablespoon of olive oil. Place the chicken thighs skin-side down and sear for 4–5 minutes until deeply golden. Don’t move them too much; let the skin render and crisp.

Flip and glaze. Flip the thighs, reduce the heat to medium, and pour the sauce around and over the chicken. Spoon some sauce onto the skin, but avoid fully submerging it if you want it to stay crisper.

Roast. Transfer the skillet to the oven and roast for 18–22 minutes, or until the thickest part of the chicken registers 175–185°F. Thighs are forgiving and taste best when cooked beyond 165°F for tenderness.

Baste and finish. Halfway through roasting, spoon the sauce over the thighs. When the chicken is done, squeeze a little fresh lemon juice over the top to brighten the flavors.

Rest and serve. Let the chicken rest for 5 minutes. Plate with extra sauce from the pan. It’s great with roasted carrots, mashed potatoes, or rice to soak up every drop.