Most pairing advice is a list: this dish, that grape. Lists are hard to remember and they fall apart the moment you eat something that isn't on them. Underneath the list there are only about five interactions, all of them physical, and once you know those you can work out the rest at the table.
The five that matter
- Tannin meets protein and fat. Tannin binds protein. Give it the protein in a steak or a hard cheese and there is less left to grip your saliva, so the wine reads as smoother. This is the whole mechanism behind red wine with red meat — not tradition, chemistry.
- Acid cuts fat, and acid answers acid. A high-acid wine refreshes the palate after something oily. It also has to keep up: if the dish is more acidic than the wine — vinaigrette, tomato, lemon — the wine will taste flat and dull next to it.
- Sweetness has to be matched or beaten. A dessert sweeter than the wine makes the wine taste thin and sour. This is the single most common pairing failure, and it is why a dry sparkling wine rarely works with cake.
- Salt helps almost everything. Salt suppresses the perception of bitterness and astringency and lifts fruit. A tannic red is friendlier with a salty dish than with a plain one.
- Chilli and alcohol amplify each other. Heat is intensified by alcohol and by tannin, and calmed by sweetness and by cold. A 15% Cabernet with a hot curry makes both worse; an off-dry, low-alcohol white makes both better.
There is a sixth worth knowing: umami — mushroom, soy, dashi, aged cheese — raises the perception of bitterness, so tannic wines can read as harsher alongside it than they did on their own.
Working it out from those
Congruent pairing means matching weight and texture: a rich, creamy dish with a broad, barrel-aged Chardonnay. Contrasting pairing means using one component to balance another: high acid against fat, sweetness against chilli. Both are just the five interactions above, applied in different directions.
So, in practice:
- Oysters and raw shellfish. High acid, no oak, no tannin. Chablis, Muscadet, a bracing Champagne. The salinity of the dish does the rest.
- Salmon and richer fish. Enough body to match, not enough tannin to clash — a medium-bodied Chardonnay, or a light Pinot Noir if you want red.
- Steak and lamb. Cabernet Sauvignon, Syrah, Nebbiolo. The fat and protein are the point.
- Roast chicken. The most flexible dish on the table. Works with a broad white or a light red, depending on what you put on it.
- Hot, spicy food. Lower alcohol, some residual sugar, served cold. Alsace Pinot Gris, off-dry Riesling, Moscato d'Asti at around 5–6% alcohol.
- Dessert. The wine has to be sweeter than the plate, or don't bother.
A Hong Kong case: Mid-Autumn BBQ
A Hong Kong barbecue is not one dish, it is six, and the marinade decides more than the meat does. Honey and char siu sauce are sweet, so a bone-dry, tannic red will taste stripped next to them — reach for something fruit-forward. Salty, savoury marinades go the other way and can take a firmer red, because the salt is working in your favour. Chicken wings with chilli want the low-alcohol, off-dry option. And everything is being eaten outdoors in September heat, which is an argument for serving the reds cooler than you think: twenty minutes in the fridge before you pour.
The part that is not chemistry
All of the above tells you what will not fight. It does not tell you what you will enjoy, and those are different questions. If you like a big red with fish, the chemistry is against you and you are still allowed. The five interactions are there so that when something works you know why, and when something doesn't you know what to change.