Slow cooker onion soup
This is a super-easy and happily budget-friendly soup with just five ingredients. The slow cooker does all the work here, caramelising and intensifying the flavours of the onion for a rich-tasting result.
In September 2023, this recipe was costed at an average of £2.40 when checking prices at three UK supermarkets. It is designed to be made in conjunction with a low-cost store-cupboard.
By Ella Tarn
Method
Toss the butter, onions, thyme (if using) and sugar together in the bowl of the slow cooker. Put the lid on and cook on high for 6–8 hours, stirring every so often, until the onions are rich and caramelised.
Pour in the stock and cook for another 30 minutes. Serve hot.
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