This Miso French Onion Soup takes everything you love about the classic soup and adds a subtle, savory twist that makes it unforgettable. The slow-caramelized onions are rich and sweet, while the miso melts into the broth, creating a deeply cozy, umami-filled comfort meal.
Melt the butter in a large pot on medium heat. Add in the sliced onions and sprinkle with salt. Place the lid on the pot and leave the onions to cook for 10-15 minutes until they begin to soften and then remove the lid and leave to cook for an additional 40 minutes, stirring occasionally until the onions are caramelized. If the onions begin to brown/burn too quickly add a splash of water and lower the heat.
Once the onions are caramelized add in the minced garlic and thyme and stir. Cook for 2 minutes and then add in the white wine, increase the heat to medium high and leave the onions to cook until most of the liquid has evaporated.
Add the beef broth and miso paste and bring to a simmer. Leave the soup to simmer for 10 minutes, and stir to ensure the miso is blended in with the broth.
Arrange 4 oven proof bowls on a baking sheet and ladle the soup into each bowl. Top each bowl with a slice of bread and then sprinkle a layer of grated cheese overtop.
Turn the oven on broil. Place the tray of soups in the oven and leave to broil for 2-3 minutes until the cheese has melted and is bubbly. Watch carefully to ensure that the cheese doesn’t burn.