Ask Kenji Anything: Tools, Woks, Knives, Stew, and Smoke Detectors (a.k.a. “Cooking Detectors”)
Ask Kenji Anything: Tools, Woks, Knives, Stew, and Smoke Detectors (a.k.a. “Cooking Detectors”) is a medium American recipe that serves 8. 80 calories per serving. Recipe by J. Kenji López-Alt on YouTube.
Prep: 15 min | Cook: 5 hrs 30 min | Total: 6 hrs 15 min
Cost: $15.90 total, $1.99 per serving
Ingredients
- 2 lb Pork Shoulder Bones (bones with some meat attached, cut into 2‑3 inch pieces)
- 2 pieces Pork Trotters (cleaned and trimmed)
- 1 large Onion (quartered)
- 2 large Carrots (cut into 2‑inch chunks)
- 2 stalks Celery Stalks (cut into 2‑inch chunks)
- 4 cloves Garlic Cloves (crushed)
- 2 leaves Bay Leaf
- 1 tbsp Black Peppercorns (whole)
- 12 cups Water (cold, preferably filtered)
Instructions
Roast Bones and Vegetables
Preheat oven to 425°F. Arrange pork shoulder bones, trotters, onion quarters, carrot chunks, and celery on a roasting pan and roast, turning once, until deeply browned, about 30 minutes.
Time: PT45M
Temperature: 425°F
Transfer to Pot and Add Water
Using tongs, transfer the roasted bones and vegetables to a large stockpot. Add 12 cups cold water.
Time: PT5M
Bring to Simmer and Skim
Heat over medium‑high until just simmering, then reduce to low. Skim off any foam that rises to the surface.
Time: PT10M
Add Aromatics
Add bay leaves, whole peppercorns, and crushed garlic to the pot.
Time: PT2M
Long Simmer
Maintain a gentle simmer for 5 to 6 hours, partially covered. Add water if the level drops too low.
Time: PT5H
Strain Stock
Remove bones and vegetables with tongs, then strain the liquid through a fine mesh sieve into a clean container. Press solids to extract remaining liquid.
Time: PT10M
Cool and Store
Cool the stock quickly by placing the container in an ice bath, then refrigerate up to 4 days or freeze for up to 3 months.
Time: PT15M
Nutrition Facts
- Calories
- 80
- Protein
- 8 g
- Carbohydrates
- 2 g
- Fat
- 4 g
- Fiber
- 0 g
Dietary info: Gluten-Free, Paleo, Keto
Ingredient Substitutions
- Instead of Pork Shoulder Bones: Beef Bones, Chicken Bones
- Instead of Pork Trotters: Pork Knuckles
Equipment Needed
- Oven
- Roasting Pan
- Large Stockpot (6‑quart)
- Fine Mesh Sieve
- Ladle
- Tongs
- Cutting Board
- Chef's Knife
Critical Steps — Do Not Skip
- Roast Bones and Vegetables
- Bring to Simmer and Skim
- Long Simmer
- Strain Stock
Chef Tips from the Video
- Roasting the bones creates a deep, caramelized flavor that elevates the stock.
- Start with cold water; it extracts flavor more evenly and keeps the stock clear.
- Skim the foam early and often for a crystal‑clear final product.
Troubleshooting
Stock is cloudy
Roast bones thoroughly, start with cold water, and skim frequently. Strain through a fine mesh sieve or cheesecloth.
Too much fat on the surface
After cooling, skim the solidified fat or refrigerate the stock overnight and remove the hardened fat layer.
Insufficient gelatin (stock feels thin)
Add more collagen‑rich parts such as additional trotters, pork knuckles, or simmer for a longer period (up to 8 hours).
Storage
Refrigerator: Up to 4 days in airtight container
Freezer: Up to 3 months in freezer‑safe containers
Room temperature: Do not leave at room temperature longer than 2 hours
Make-Ahead Tips
- Make a large batch and freeze in 2‑cup portions for future soups and sauces.
- Use the stock as a base for ramen, braised pork, or hearty vegetable soups.
Frequently Asked Questions
What is the cultural significance and history of pork stock in Chinese cuisine?
Pork stock, especially made with trotters and collagen‑rich bones, is a cornerstone of Chinese soups and braised dishes. It provides the silky mouthfeel prized in dishes like braised pork belly and hot pot broths, and its use dates back centuries to traditional Chinese medicinal cooking.
What are the traditional regional variations of pork stock in Chinese cuisine?
In Cantonese cooking, pork stock often includes dried scallops and mushrooms for extra umami. Sichuan versions may add star anise, ginger, and chili oil for a spicier profile. Northern styles favor simple aromatics like onion and carrot, focusing on pure gelatin texture.
What occasions or celebrations is pork stock traditionally associated with in Chinese culture?
Pork stock is commonly prepared for Lunar New Year feasts, wedding banquets, and family gatherings where hearty soups and braised meats are served. Its richness symbolizes prosperity and abundance.
How does pork stock fit into the broader American comfort‑food tradition?
In the United States, pork stock is often used as a base for hearty stews, chowders, and gravies, echoing the comfort‑food ethos of rich, warming dishes that showcase deep flavor and a silky mouthfeel.
What are the authentic traditional ingredients for pork stock versus acceptable substitutes?
Authentic ingredients include pork shoulder bones, trotters, and aromatics like onion, carrot, and celery. Acceptable substitutes are beef bones for a richer flavor, or chicken bones for a lighter stock; dried shiitake mushrooms can add umami if fresh pork is unavailable.
What other dishes pair well with this pork stock in Asian and Western cuisines?
Use the stock for ramen broth, pork ramen, braised pork shoulder, pork and bean stew, creamy mushroom soups, or as the liquid for cooking rice to add depth.
What are the most common mistakes to avoid when making pork trotter stock?
Common mistakes include skipping the roasting step (resulting in a flat flavor), simmering too hard (making the stock cloudy), and not skimming foam (leaving impurities). Also, using too little water can cause scorching.
Why does this recipe call for roasting the bones before simmering?
Roasting caramelizes the surface proteins and sugars, creating Maillard‑derived flavors that give the stock a richer, deeper taste. It also helps develop a darker color and reduces the need for long simmering to achieve flavor.
Can I make this pork stock ahead of time and how should I store it?
Yes. After cooling, refrigerate the stock for up to 4 days or freeze in airtight containers for up to 3 months. For best texture, chill, then skim any solidified fat before freezing.
What does the YouTube channel J. Kenji López-Alt specialize in?
The YouTube channel J. Kenji López-Alt specializes in science‑based cooking, detailed technique breakdowns, and practical home‑cooking recipes that demystify restaurant‑level methods for everyday cooks.
How does the YouTube channel J. Kenji López-Alt's approach to stock making differ from other cooking channels?
Kenji emphasizes rigorous testing, explains the chemistry behind each step (like why to start with cold water and skim foam), and often provides multiple variations, whereas many channels focus on speed or visual appeal without deep technical insight.
Last updated: August 21, 2026
