Slow Cooker French Onion Soup

Easy Slow Cooker French Onion Soup

Traditionally, French onion soup is made by cooking onions for a long time on the stovetop over low heat until they are rich golden brown. This makes a delicious, flavorful broth, but it's also time-consuming and requires you to be home for the several hours that the onions are cooking.

Cooking the onions all day in a slow cooker is SO much easier and still produces a delicious, flavorful French onion soup.

It's important to get your onions in the slow cooker early in the day. Getting that lovely golden color and rich flavor requires the onions to cook for about 10 hours in your slow cooker on high heat. You can also cook the onions up to 3 days in advance if you like. So, if you're the kind of person that likes to do some meal prep on the weekends, cooking onions all day on a Saturday or Sunday will make weeknight French onion soup a snap.

French onion soup is a baked soup topped with cheese and croutons. It works best to bake the soup in individual bowls or pots. You can use ramekins, oven-proof soup bowls, or get all fancy and traditional with these adorable lion's head soup bowls.

Making French onion soup requires a LOT of onions. This recipe uses 8 pounds, which is actually more than you need if you're only making French onion soup.

Also, I like a lot of onions in my French onion soup. But, please feel free to use fewer onions if you prefer your soup to have a higher proportion of broth to onions.

Regardless of how many onions you're using, it's a lot of chopping. I find using a food processor to slice the onions invaluable. If that sounds good to you, peel and cut the onions into quarters and then slice them using the 4MM slicing blade of your food processor.