Classic Demi Glace Recipe

Preheat oven to 425°F

Spread bones in a single layer on a roasting pan.

Roast 45–60 minutes, turning once.Time: 1 hour

Add onion, carrot, and celery to the pan. Roast another 20 minutes.

Stir in tomato paste and roast 10 minutes moreTime: 30 minutes

Transfer everything to a stockpot.

Place the roasting pan over medium heat. Add a splash of water and scrape up browned bits.Time: 5 minutes

Pour into the pot.

Add 8 cups of cold water to the pot. Bring to a gentle simmer (not a boil). Skim foam and fat as it rises.

Add thyme, bay leaf, and peppercorns.

Simmer uncovered 3–4 hoursTime: 3–4 hours

Strain through a fine mesh sieve. Discard solids.

Return liquid to a clean pot. Simmer gently until reduced by half→ Target: ~2 cupsTime: 45–75 minutes

You’re done when:👀 Deep brown and glossy🥄 Coats the back of a spoon (nappe)🌫️ Slightly syrupy consistency