Uiensoep (Dutch Onion Soup)
Uiensoep
Dutch onion soup — onions cooked down slow and dark, simmered in beef stock, and finished with a cap of toasted bread and melted Gouda or Leiden cheese.
IVSoups- Prep
- 20 min
- Cook
- 75 min
- Serves
- 4
- Level
- Beginner
Onion soup is a dish thrift built. When onions were among the cheapest things in the market and a pot of beef stock could be stretched all week, cooks across Europe learned to coax something rich out of almost nothing but patience. The Dutch uiensoep is a cousin of the famous French bowl, but it speaks in a local accent — often finished not with Gruyère but with a mature Gouda or the cumin-flecked cheese of Leiden.
Sweetness out of thrift
The nineteenth-century Dutch kitchen was a frugal one, ruled by the potato and the household manual, and onion soup fit its logic perfectly: a little butter, a heap of cheap onions, and time. What makes it feel generous rather than mean is the transformation the onions undergo. Cooked slowly enough, their sharpness turns to a deep, jammy sweetness, and the pale broth around them takes on colour and body without a scrap of meat beyond the stock.
Onion soup is proof that patience is an ingredient: forty slow minutes turn pennies of onion into something rich.
The gratin cap
The finishing flourish is the raft of toasted bread and melted cheese that seals the bowl. Two small technical points matter. Toast the bread properly dry, so it floats and holds instead of collapsing into mush, and reach for a cheese with age — a mature Gouda grates, melts and browns far better than a young, oily one. Under a fierce grill it blisters into a golden lid.
Break through that cheese into the dark sweet broth beneath, and you understand why this soup outlived the hard times that made it.
“Do not rush the onions — the whole soup lives or dies on 40 unhurried minutes of caramelising.”
Ingredients
Serves 4
The soup
- 1 kgonions — thinly sliced
- 40 gbutter
- 1 tbspoil
- 1 tspsugar — to help them colour
- 1 tbspplain flour
- 1.2 litresbeef stock — hot
- 1bay leaf
- 50 mljenever or white wine — optional deglaze
The cap
- 4slices of baguette or rye — toasted
- 150 gaged Gouda — grated, or Leidse kaas
- to tastesalt and pepper
Method
- 1
Cook the onions down
Melt the butter with the oil in a wide heavy pan, add the sliced onions and the sugar, and cook over low-medium heat, stirring often, for 30 to 40 minutes. Patience here is everything — slow cooking caramelises the onions' sugars into the deep, sweet brown that carries the whole soup.
- 2
Deglaze and dust with flour
When the onions are a rich mahogany, pour in the jenever or wine to lift the caramelised layer from the base, scraping it in. Stir in the flour and cook a minute to lose its rawness and lightly thicken the broth.
- 3
Simmer the soup
Pour in the hot beef stock, add the bay leaf, and simmer gently for 20 minutes so the flavours settle and the broth deepens. Season with salt and plenty of pepper — a good beef stock and dark onions want firm seasoning.
- 4
Toast the caps
Toast the bread until dry and crisp so it holds up under the soup rather than dissolving. A dried slice is the raft that carries the cheese and keeps the gratin from sinking.
- 5
Gratinate and serve
Ladle the soup into ovenproof bowls, float a toast on each, and heap with grated aged Gouda. Slide under a hot grill until the cheese is bubbling and browned. Serve straight away, blisteringly hot.
With the soup
A bowl of snert is a meal — but the trimmings make it Dutch.
- Roggebrood met spek — rye bread with a slab of bacon
- Katenspek — smoked cured bacon on the side
- Mustard — a dab of coarse mustard on the rye
Questions from the kitchen
How is this different from French onion soup?+
The method is the same family, but the Dutch version reaches for a mature Gouda or the clove-studded Leidse kaas instead of Gruyère, and cooks sometimes deglaze with jenever rather than wine. It is the same idea in a Dutch accent.
What cheese melts best on top?+
A well-aged Gouda grates and browns beautifully and gives a nutty depth. Leidse kaas adds cumin's warmth. Avoid very young cheese, which turns oily rather than golden under the grill.
Why won't my onions caramelise?+
The heat is too high or the pan too crowded, so they steam instead of browning. Use a wide pan, keep the heat moderate, stir regularly, and give it the full 40 minutes; a pinch of sugar helps them along.
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