Can I use chicken breasts instead of thighs?
Yes, but thighs stay moister during the long braise. If using breasts, reduce cooking time by 5–10 minutes and check doneness at 165°F to avoid drying them out.
How long does it take to caramelize the onions?
Properly caramelizing onions takes 30–40 minutes over medium heat, stirring frequently. Don't rush; this builds the dish's signature sweet depth.
What cheese works best?
Gruyère is traditional and melts beautifully, but Comté, Swiss, or even sharp cheddar work well. Avoid pre-shredded cheese, which contains anti-caking agents.
Can I make this ahead?
Yes. Braise through step before adding cheese, cool, refrigerate up to 3 days, then reheat gently on stovetop or in a 350°F oven until warmed through. Top with cheese and broil to finish.
Is this dairy-free?
The recipe relies on butter and cream for its signature richness. Swap butter for olive oil and cream for coconut cream, but the flavor profile will shift.