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Slow Cooker French Onion Soup

Inspired by the classic French recipe but adapted for the slow cooker, this onion soup from Nathan Anthony, aka Bored of Lunch, is rich, buttery and extremely easy to make.

From the book

Nathan Anthony


My all-time favourite soup, and one I tried for the first time in a French restaurant in Disneyland Florida of all places. With the first spoonful, I knew I had to make it at home and I have evolved it into a convenient slow-cooker recipe. This might not be the most authentic recipe and I apologise now to the French nation – I must confess to using Italian herb seasoning and Worcestershire sauce in my French onion soup.

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10 onions, sliced
100g low-fat butter
1 tbsp Italian herb seasoning
2 garlic cloves, crushed
1 bay leaf
2 tbsp brown sugar
200ml white wine
900ml vegetable or beef stock
1 tsp Worcestershire sauce slices of baguette
120g gruyère cheese, grated
salt and pepper, to taste

Essential kit

You will need: a slow cooker.

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Place the onions, butter, Italian seasoning, garlic, bay leaf, sugar and wine in the slow cooker, stir and season to taste. Cook on high for 10 hours. Add the stock and Worcestershire sauce and stir well.

Arrange the slices of bread on top of the soup and sprinkle with the grated cheese. Cook under a preheated grill for 8–10 minutes until golden brown. If your slow cooker pot is not ovenproof, transfer the soup to an ovenproof dish before topping with the bread and cheese.

410 calories per serving.

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From the book: Bored of Lunch: The Healthy Slow Cooker Book

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