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A weekly letter about food, science, and why things taste the way they do
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Hi Reader
It's the Independence Day holiday weekend here, which means a lot of potato salad, backyard grills, and the kind of low-and-slow cooking that fills the whole neighborhood with smoke. [Get all my recipes for this holiday weekend here]
Speaking of which; smoke is one of those flavors that seems impossible to fake—until you understand the chemistry behind it. This week on Flavor Forward, I'm breaking down how liquid smoke actually works (it's condensed wood smoke, not magic), why that pink smoke ring forms on barbecue ribs, and how a cup of Lapsang souchong tea can trick your brain into tasting a deeply smoky broth without ever lighting a fire.
But smoke isn't just the language of American barbecue. Across the world, cooks have developed remarkably different ways to harness it. In India, the dhungar method—placing a piece of hot charcoal into a finished dish and trapping the smoke beneath a lid—gives dishes like dal makhani and biryani that elusive restaurant-quality aroma. In Mexico, chipotles and other smoked chiles build smoky complexity directly into sauces and stews before they ever reach the pot. In Japan, katsuobushi—skipjack tuna that is smoked, fermented, and dried over months, forms the backbone of dashi, where smoke becomes the quiet foundation of an entire cuisine's flavor. And in Scotland, peat smoke infuses barley during malting, giving Scotch whisky its unmistakable medicinal, earthy character.
What's remarkable is that across all of these traditions, smoke is never just about flavor. It's also about preservation, ritual, and place. The fuel, the ingredient, and the technique all shape the final result. Hickory and mesquite deliver bold, assertive flavors. Dhungar is fleeting and enclosed. Katsuobushi takes months to produce. Peat smoke lingers gently through the malting process. The chemistry is remarkably similar, but the culinary outcomes couldn't be more different.
If you've ever wanted competition-level barbecue flavor without a backyard smoker, this week's newsletter will show you how. But once you understand the science of smoke, you'll start seeing it everywhere—not just in ribs, but in some of the world's most iconic dishes.
 xx
Nik
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THE SCIENCE EDIT
THIS WEEK'S PRINCIPLE
Why Your barbecue has a pink ring (and what it actually means)
Smoke is more than a flavor -- it's a chemistry. And once you understand what's actually happening inside the meat, you'll never look at a pink ring the same way again.
1. What Nitric Oxide Does
When wood burns, it produces nitrogen oxides (gases), one of which is nitric oxide (NO). As these gases dissolve into the moist surface of the meat, nitric oxide diffuses inward and binds to myoglobin, the oxygen-carrying pigment responsible for meat's red color. This forms nitrosomyoglobin, a heat-stable pigment that remains pink even after the meat is fully cooked.
2. Why It Forms a Ring
The pink layer stops exactly where smoke penetration stops; typically 1/4 to 1/2 inch (6 to 12 mm) beneath the surface. The thickness of the ring reflects how long the meat remained in a smoke-rich environment while its surface was still cool and moist—not how well done the meat is.
3. Why Oven Ribs Never Have One
Without wood combustion, there's no nitric oxide, and without nitric oxide, there's no ring. No matter how tender your oven-roasted ribs are, the chemistry simply isn't there.
Science Tip: Your Refrigerator Uses the Same Chemistry
- Cured meats. Ham, corned beef, and bacon stay pink after cooking for the same reason. Sodium nitrite in the curing salt is converted to nitric oxide which binds to myoglobin exactly like nitric oxide from wood smokelocking in that color permanently.
- The smoke ring is a quality signal, not a safety signal. A thick pink ring means long, steady smoke exposure. Judge doneness by temperature, not color.
- Wood choice matters. Wood species can influence smoke-ring formation, but so can combustion conditions. Temperature, airflow, moisture, and how the fire burns all affect how much nitric oxide reaches the meat. Hickory and oak often produce more pronounced smoke rings than milder fruitwoods, though the way the fire is managed is usually just as important as the wood itself.
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COMING SOON
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Fundamentals of Flavor is available for preorder now — this one has been six years in the making and I'm genuinely proud of it. If you've been cooking with me for a while, this book is for you.
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THE RECIPEs
Ready to play with smoke? Try these recipes.
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DAL MAKHANI
This is the dal makhani that tastes like the restaurant version -- silky, deeply spiced, and finished with a swirl of cream and fried ginger that cuts through the richness.
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NORTH CAROLINA - STYLE PULLED PORK
This North Carolina-style pulled pork is slow-cooked until it falls apart, then finished with a sharp vinegar sauce that cuts through the fat in exactly the right way. It's the recipe to make this weekend while the smoke science is still fresh in your mind.
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The Fourth of July Menu
The Fourth of July menu is up on the site -- smoky ribs, spiced lamb kebabs, crispy snacks, cold drinks, and enough frozen desserts to get you through the heat. Everything you need for the cookout is in one place.
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What I'm Up TO
My little experiment started as a desperate attempt to use up a mountain of sungold tomatoes and it worked better than expected. I sliced them in half, dehydrated them at 165°F (74°C) for 16 hours until they shriveled down to something crunchy and tacky, then submerged them in a jar of extra-virgin olive oil for a week. The result? They taste exactly like good sun-dried tomatoes packed in oil. Turns out the tomato surplus isn't a problem; it's an ingredient.
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