Can I use chicken breasts instead of thighs?
Chicken breasts will work but lack the fat and flavor of thighs. If using breasts, watch timing carefully to avoid drying them out; they cook faster than thighs.
How do I get the skin really crispy?
Pat the chicken completely dry, start it skin-side down in a cold, dry skillet (no oil), and cook over medium heat until the fat renders and the skin is deeply golden brown. Do not move it or cover it.
Can I substitute the mushrooms?
Yes. Cremini, portobello, or shiitake mushrooms work well. Avoid very delicate varieties that break down easily.
Can I make this ahead?
Cook the chicken and sauce separately, then reheat gently over low heat. The sauce can be made 1-2 days ahead and refrigerated; reheat before serving.
What if I don't have dry white wine?
Dry vermouth or chicken broth are acceptable substitutes, though the flavor profile will shift slightly away from the classic French preparation.