Food pairing
What wine goes with french onion soup?
Deeply caramelised onions in beef stock under melted cheese — sweet, savoury and salty at once.
The short answer
Alsace Pinot Gris
excellentTexture and a touch of roundness to meet the caramelised onion, with acidity for the cheese.
Sparkling Shiraz
Works because the dish is rich, and acidity cuts through fat and refreshes the palate.
Tawny Port
Works because the dish is rich, and acidity cuts through fat and refreshes the palate.
Madeira
Works because the dish is rich, and acidity cuts through fat and refreshes the palate.
Cru Beaujolais
classicJuicy, low in tannin and high in acidity — it meets the sweetness without being flattened by the salt.
Watch out: a dry wine will taste thin and sour against a sweet dish.
Late Bottled Vintage Port
Works because the dish is rich, and acidity cuts through fat and refreshes the palate.
Why it works
Caramelising onions for an hour converts their starches to sugar, so this is a genuinely sweet dish hiding inside a savoury one. The Gruyère on top adds salt, fat and more umami.
The sweetness is why a bone-dry, high-tannin red often disappoints here, and why a wine with a little roundness works better than its reputation suggests.
Sweet, salty and umami-rich together. Tannin gets sharpened by the salt and the umami, while the onion sweetness makes a very dry wine taste austere.
The reasoning
These are the pairing principles this dish triggers. Every recommendation above was scored against them.
Fat needs acidity or tannin
The richer the dish, the more acidity or tannin the wine needs.
Triggered because this dish is high in fat. But: Which one depends on the fat. Protein-bound fat (steak, hard cheese) softens tannin and suits it; dairy fat (cream sauces, soft cheese) is better handled by acidity, and tannin against a cream sauce can taste coarse.
The wine should be as sweet as the food
With a sweet dish, the wine must be at least as sweet.
Triggered because this dish is high in sweetness. But: It must also keep its acidity. Sweetness without acidity is cloying, which is why great dessert wines are high in both and why a simple sweet wine palls after half a glass.
Salt loves acidity and bubbles
Salty dishes suit high-acid and sparkling wines, and clash with tannic ones.
Triggered because this dish is high in saltiness. But: Very hard aged cheeses are the exception: their fat and protein content is high enough to offset the salt and let a tannic red work.
Umami sharpens tannin and bitterness
Very savoury dishes suit lower-tannin wines, or wines whose tannin has softened with age.
Triggered because this dish is high in umami. But: Umami arriving with plenty of salt and fat — as in aged Parmesan or a rich ragù — offsets much of the effect, which is why those dishes handle red wine better than mushrooms alone.
Match intensity with intensity
The weight and flavour intensity of the wine should roughly match the dish.
Triggered because this dish is high in flavourIntensity. But: Intensity is not the same as body. A Mosel Riesling is light-bodied but aromatically intense, which is why it copes with strongly spiced food that would flatten a heavier but quieter wine.
The sauce usually matters more than the protein
Pair with the dominant flavour of the finished dish, not with the headline ingredient.
Triggered because this dish is high in flavourIntensity. But: Where the protein is genuinely dominant — a plain grilled steak, a piece of sashimi — it does lead. The rule is about which element is loudest, not about ingredients as a class.
What the engine sees
The structural profile WineHQ holds for this dish.
| Dimension | Level | What it means |
|---|---|---|
| Sweetness | Noticeably sweet | Perceived sugar in the dish, from a savoury main to a dessert. |
| Saltiness | Salty | Perceived salt, including cured, brined and fermented ingredients. |
| Umami | Dominant | Savoury depth from mushrooms, aged cheese, soy, cured meat, tomato or stock. |
| Fat | Rich | Butter, cream, oil, marbling and frying — the main driver of how much structure a wine needs. |
| Aromatic intensity | Aromatic | Spices, herbs and aromatics — how loudly the dish smells. |
| Flavour intensity | Strong | Overall power of the dish on the palate, regardless of its character. |
| Overall richness | Rich | The composite heaviness of the dish, close to how "body" works for wine. |
| Protein and structure | Moderate | Chewy protein content. Matters because protein and fat soften the perception of tannin. |
| Texture | Medium | From delicate and flaky to dense and chewy. |
Where the rules disagree
Dishes are not always structurally coherent, and the interesting ones rarely are. These are the dimensions WineHQ’s principles pull in opposite directions here.
Tannin — genuinely contested
This dish pulls tannin in both directions at once, and neither side clearly wins. Wines at either extreme will each work in one respect and fail in another, so moderate tannin is the safest structural answer — and it is worth reading the trade-off rather than trusting the score.
What to avoid
Caramelised onion is intensely sweet-savoury and the melted cheese brings dairy fat; tannin is coarse against both.
Something more adventurous
Marsala
Sicily’s fortified wine, made in dry and sweet styles and badly served by its reputation as a cooking ingredient.
Sources
Sources consulted
- WSET educational materials and the Systematic Approach to Tasting — Wine & Spirit Education Trust