Caramelised Onions

Name: Caramelised Onions
Prep time: 20 min
Cook time: 600 min
Total time: 620 min
Yield: 4
Cuisine: French
Ingredients: 2 kg onions (8–10 large), cut into ½ cm half-moons; 50 g butter, diced; 2 tbsp olive oil; 1 tsp salt; 1 tsp sugar; 2 sprigs thyme; 1 tbsp sherry vinegar or balsamic vinegar

Deep golden, sweet onions without standing at the hob for an hour, for tortilla, burgers, onion soup or a tosta with goat's cheese. This recipe makes approx. 500 g, enough for 2 jars.

€3–4MildVegetarian20 min prepLOW 10–12 hrsFreezes well

Budget version · from €3–4Just the essentials, with money-saving tips

Ingredients serves 4

Tick off what you already have at home.

2 kgonions (8–10 large), cut into ½ cm half-moonscebollas
Any supermarket
Aisle: frutería. 1-2 kg bags are cheaper than loose.
50 gbutter, dicedmantequilla
Any supermarket
Aisle: lácteos. Choose 'sin sal' or 'con sal' deliberately; both are widely sold.
2 tbspolive oilaceite de oliva virgen extra
MercadonaMASEl Corte Inglés
Aisle: aceites. Check for 'virgen extra' on the label; local Málaga mills often appear in regional chains like MAS.
1 tspsaltsal
1 tspsugarazúcarextra
2 sprigsthymetomilloextra
1 tbspsherry vinegar or balsamic vinegarvinagre de Jerezextra
Any supermarket
Aisle: aceites y vinagres. An Andalusian product, widely sold and good; 'Reserva' has more depth.

Method

1
Put the onions in the slow cooker; the pot can be completely full, as they shrink enormously. Scatter over the butter, oil, salt, sugar and thyme (optional) and toss everything together.
2
Put the lid on and cook for 10–12 hours on LOW. Toss once halfway through if you're around.
3
Are the onions soft but is there still a lot of liquid in the pot? Then wedge a wooden spoon between the pot and the lid and cook for another 1–2 hours on HIGH, until the liquid has evaporated and the onions are deep golden and jammy. Stir now and then.
4
Optional: Stir in the sherry vinegar for a fresh, sweet-and-sour finish.
5
Leave the onions to cool and spoon them into clean jars. Keeps for 1 week in the fridge. Freeze the rest in portions in an ice cube tray.

Flavourful Cooking · slowcookerspain.com/en/recipes/caramelised-onions/