I mix the flour with salt and pepper in a shallow dish, then coat each chicken thigh, shaking off excess. This helps the sauce cling and gives a light crust on the outside.
In the skillet over medium-high heat, I heat the olive oil until shimmering, then sear each thigh for about 1–2 minutes per side until golden. The chicken doesn’t have to be cooked through yet — just browned nicely.
I carefully remove the skillet from heat and pour in the bourbon (be cautious—steam or a flare can occur). The bourbon helps lift flavor bits from the pan and adds a gentle caramel note.
Then I stir in the sauce ingredients — broth, maple syrup, chopped pecans, Dijon mustard, vinegar, Tamari, rosemary — and return to heat. I nestle the chicken back in, loosely cover with foil, reduce heat to medium, and let it simmer for about 10 minutes, flipping the thighs once or twice until sauce thickens and chicken is cooked through.
I transfer to plates, spoon extra sauce and pecans over the top, and serve immediately (more on serving below).