P
French · France
Soupe à l'Oignon: French Onion Soup
Soupe à l'oignon gratinée — the French onion soup with a bread and Gruyère gratin topping — requires onions cooked for 45–60 minutes to a deep brown caramelisation before any broth is added. The onion caramelisation is the entire flavour development — the fructose and glucose in the onions undergo Maillard reactions and caramelise, producing the 300+ aromatic compounds that make the soup's flavour. An onion soup made in 20 minutes tastes of sweet onion broth; one made in 60 minutes tastes of something entirely different.
I
The Market List
The benchmark for each ingredient, and who stocks it near you. Tap a stockist to go straight to the product.
1.5–2 kg
yellow onions
peeled and thinly sliced
Your own market
50 g
unsalted butter
Your own market
1 pinch
white sugar
added in the first 10 minutes
Your own market
1.2 litres
beef stock
good body, well reduced
Your own market
For the gratin
8 slices
baguette
toasted
Not yet stocked in British Columbia
150 g
Gruyère
coarsely grated
Not yet stocked in British Columbia
II
The Method
1
Melt the butter in a wide, heavy-bottomed pot over medium heat. Add all the sliced onions and the pinch of sugar. Stir to coat. Cook at medium heat, stirring every 5 minutes, for 45–60 minutes. The onions are ready when they have collapsed to a fraction of their original volume and have turned deep amber to mahogany — the colour of a well-tanned complexion, darker. Any pale golden colour means more time is required. Any black spots mean the batch is compromised; they cannot be corrected and will introduce bitterness throughout. This is where the dish lives or dies.
2
Add the beef stock to the caramelised onions and bring to a simmer, scraping up any residue from the base of the pot. Simmer for 15–20 minutes until the stock has absorbed the full depth of the onion flavour and the liquid has a body drawn from the stock's collagen. Taste for seasoning.
From the canon — Onions cooked in fat over medium-low heat for 45–60 minutes until deeply browned, sweet, and reduced to approximately one-fifth of their original volume. Caramelised Onions: The Time Requirement →
3
Ladle the soup into oven-safe bowls. Float two slices of toasted baguette on the surface of each bowl and cover generously with grated Gruyère. Place under a hot broiler until the cheese melts, bubbles, and achieves deep brown spots across its surface.
From the canon — France's daily bread — a long (55–65cm), thin (5–6cm diameter), lean wheat bread with a shattering crust, irregular open crumb, and mild tang from a slow, co… Baguette →
III
Quality Hierarchy
01
Reserve — Home-made veal-and-beef stock reduced to a natural body; onions from a farmers' market, older and higher in fructose; aged Gruyère de Comté, hand-grated.
02
Estate — Good-quality butcher's beef stock or a well-reduced shop-bought concentrate; large yellow onions, properly caramelised the full 60 minutes; aged Gruyère from a cheese counter.
03
Market — Decent packaged beef stock; standard supermarket yellow onions caramelised the full 45 minutes; pre-grated Gruyère.
04
House — Any beef stock; any yellow onions — provided the caramelisation time is not shortened below 45 minutes, the dish remains itself.
IV
Sensory Tests
◇Sight. Onions have collapsed dramatically and are uniformly deep amber to mahogany, with no pale patches and no black spots.
◇Smell. A deep, nutty, almost toffee-like aroma rises from the pot — sweet but not sharp — indicating full Maillard development.
◇Sight. The finished gratin shows deep brown spots across a bubbling, fully melted Gruyère surface.
◇Touch. The toasted baguette slices, pressed lightly, yield no crunch beneath the cheese — they have absorbed soup and softened through.
◇Where it lives or dies. The colour of the onions at 45 minutes decides the dish: deep amber to mahogany means the 300-plus aromatic compounds of full caramelisation are present; pale golden means they are not, and no subsequent step can supply them; black spots mean bitterness that cannot be corrected.
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VI
What to Pour
The pairing
Buffalo Trace Kentucky Straight Bourbon Whiskey
Buffalo Trace Distillery · Kentucky Bourbon Country
Not yet stocked in British Columbia
Whisky
From British Columbia
Nothing from British Columbia holds against this yet.
Without alcohol
No pour without alcohol holds against this yet.
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The whole pairingPillar VII
Origin and lineage are part of membership.
Where the dish comes from and how it came to be — on every recipe.
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