01 -  Thoroughly pat chicken thighs dry with paper towels. Evenly season both sides with kosher salt and freshly ground black pepper. 
 02 -  Heat a large skillet over medium-high. Arrange chicken thighs skin-side down; sear for 6 to 7 minutes until the skin is crisp and golden. Flip thighs and cook another 5 minutes. Transfer chicken to a plate and set aside. 
 03 -  Reduce heat to medium. Add unsalted butter to the skillet and cook, swirling occasionally, until foaming subsides and the butter turns a rich golden brown with a nutty aroma (about 2 to 3 minutes). 
 04 -  Stir in minced garlic, thyme, rosemary, and red pepper flakes if using. Sauté for 1 minute, allowing aromatics to release their fragrance. 
 05 -  Pour in lemon juice and chicken broth, scraping up any browned bits from the bottom of the skillet with a wooden spoon. 
 06 -  Return chicken thighs skin-side up into the skillet. Spoon some brown butter sauce over each thigh. 
 07 -  Reduce heat to low, cover with lid, and gently simmer for 12 to 15 minutes or until chicken reaches 165°F internal temperature. 
 08 -  Uncover and let the sauce simmer an additional 2 to 3 minutes to reduce if desired. Garnish with chopped parsley and serve immediately with lemon wedges.