Pat chicken thighs completely dry with paper towels—this step is crucial for achieving that gorgeous golden crust. Mix thyme, rosemary, garlic powder, onion powder, paprika, pepper, and salt in a small bowl, then coat all sides generously.
Heat olive oil in a large Dutch oven or deep skillet over medium-high heat for 2 minutes. Once shimmering, carefully place thighs skin-side down and sear for 5-6 minutes without moving them—resist the urge to peek.
Flip each thigh and sear the other side for another 3-4 minutes until the skin is deeply golden. Transfer to a plate and set aside while you prepare the aromatic base.
In the same pan, add diced onion and celery, sautéing for 3 minutes until softened and fragrant. Stir in minced garlic and cook another 1 minute, then deglaze the pan with chicken broth, scraping up all those flavorful browned bits.
Return the hearty savory herb chicken thighs recipe to the pot, nestling them among the vegetables. Add carrots, bay leaf, and fresh parsley, then bring everything to a gentle simmer.
Cover partially and braise for 15-18 minutes, allowing the liquid to reduce slightly and the vegetables to become tender. The chicken is done when the thickest part reaches 165°F on a meat thermometer.
Remove from heat and swirl in butter for silky richness. Taste and adjust seasoning with salt and pepper before serving directly from the pot for maximum coziness.