French Onion Soup {Easy Slow Cooker Recipe}

slow cooker French onion soup with cheese crust

5 from 18 votes

French Onion Soup {Easy Slow Cooker Recipe}

A take on the classic recipe for French Onion Soup but adapted for your Slow Cooker. Complete with giant cheese topped crouton top.

Prep Time15

Cook Time10 30

Total Time10 45

Course: Main Course

Cuisine: French

Servings:

Author: Sarah Rossi

Ingredients

For the Slow Cook:

1.5 kg Onions Peeled and cut into strips, see notes.
75 g Butter
3 tsp Brown Sugar
3 tsp Thyme
2 Bay Leaves
Salt and freshly ground black pepper

To add to the Onions:

1 litre Beef Stock
100 ml Sherry
2 tbsp Worcestershire sauce

For the topping:

Bread Slices
Gruyere Cheese

Instructions

Put all of the soup ingredients APART FROM the stock, sherry and Worcestershire sauce into the slow cooker and cook on HIGH for 9 - 10 hours or LOW for 12 - 13 hours, stir occasionally if you are nearby.
Remove the bay leaves. Add the stock and sherry and cook for a further 30 minutes. Check for seasoning, it may add more salt.

Optional:

Top with the bread slices and cheese and pop under the grill for about 10 minutes to melt.

Notes

Cutting the Onions
You can use ready chopped onions for this to save the crying, but annoyingly, they aren't quite as good. I timed myself chopping them and it takes about 10 minutes to peel and cut them all (if I'm concentrating and not getting distracted). I think in this case, it might be worth it.

Stock
To make this vegetarian feel free to substitute the stock for a vegetarian stock.

Topping
Slices of baguette work well here and Gruyere cheese is traditional as it melts perfectly and the taste is ideal with onions. You can use another cheese if you prefer though.

Nutrition
The nutritional info does not include the topping as we should always measure bread and cheese with our heart!

Nutrition