Preheat your oven to 425°F and position a rack in the upper-middle position for optimal heat distribution. Pat the chicken thighs completely dry with paper towels, removing all surface moisture to ensure maximum browning and crispiness.

In a small bowl, combine olive oil, minced garlic, fresh rosemary, fresh thyme, Dijon mustard, lemon zest, salt, black pepper, paprika, and cayenne pepper to create your herb paste. Mix thoroughly until the consistency resembles wet sand with distinct herb particles visible throughout.

Generously coat each juicy herb-rubbed chicken thighs piece with the herb mixture, working the paste under the skin and all over the exterior surface. Let the coated thighs rest at room temperature for 10 minutes to allow flavors to penetrate the meat.

Heat a large cast-iron skillet over medium-high heat until shimmering, then place herb chicken skin-side down for 6-8 minutes until the skin turns deep golden brown. This initial sear creates a flavorful crust that keeps juices locked inside during roasting.

Flip the thighs skin-side up and transfer the skillet to the oven for 18-20 minutes until an instant-read thermometer registers 165°F in the thickest part without touching bone. Remove and rest the chicken on a cutting board while you build the sauce.

Place the same skillet over medium heat and deglaze with white wine, scraping up all the browned bits with a wooden spoon—these are pure flavor. Add chicken broth and simmer for 3-4 minutes until reduced by one-quarter.

Whisk cornstarch with 2 tablespoons cold water to create a slurry, then whisk into the simmering sauce until thickened, about 1 minute. Remove from heat and stir in butter until it melts completely, creating a silky pan sauce.

Plate the chicken thighs and drizzle generously with the warm herb sauce, making sure every portion gets both broth and butter for maximum richness and flavor delivery.