
Indulge in this protein-packed French Onion Chicken Soup, featuring sweet caramelized onions, a hearty bone broth, and a decadent topping of melted, golden cheese. It’s the ideal choice for those seeking a comforting and flavorful dinner experience.
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In a Dutch oven or a large heavy-bottomed pot, heat the oil and salt over medium to medium-low heat. Add the onions and shallots, sautéing them until they become tender and golden brown, which will take around 30 to 40 minutes. Be sure to stir frequently. You may cover the pot intermittently to create steam, helping to keep the onions from drying out. The goal is to achieve a caramelized texture without allowing them to burn.
Incorporate the flour into the mixture, stirring well and cooking for an additional 2 to 3 minutes. Next, pour in the white wine along with sherry vinegar, thyme, and bay leaves. Allow the mixture to simmer uncovered for about 10 minutes to allow the alcohol to evaporate.
Pour in the chicken bone broth and add the chicken. Increase the heat to bring the mixture to a boil, then lower the heat to maintain a gentle simmer. Cook until the chicken is fully cooked, which should take approximately 25 to 30 minutes.
Take the chicken out of the pot and shred it using two forks. Return the shredded chicken back to the soup. At this stage, taste the soup and adjust the salt according to your preference. Discard the bay leaves and thyme. Ladle 1½ cups of the soup into 6 oven-safe bowls.
Arrange the bowls on a baking sheet. Place toasted bread rounds on top of the soup in each bowl, then sprinkle cheese over the bread. Broil on low, positioning the baking sheet on the second rack from the top, until the cheese is melted and bubbly, which should take about 2 to 3 minutes.