A slow-simmered bowl of deep, caramelized onions and rich broth that warms you from the first spoon to the last.
Prep & Cook Time
Prep: 15 min
Cook: 60 min
Total: 75 min
Ingredients
4 large yellow onions, thinly sliced
3 tbsp butter
1 tbsp olive oil
2 cloves garlic, minced
6 cups beef broth
1 tsp salt
1/2 tsp black pepper
1/2 tsp dried thyme
1 bay leaf
Baguette slices
Shredded Gruyere-style cheese
Instructions
Melt the butter with the olive oil in a large pot over medium heat. Add the sliced onions and cook slowly, stirring often, until they soften and begin to turn golden.
Continue cooking the onions over medium-low heat until deeply caramelized and dark golden, allowing their natural sweetness to fully develop.
Add the garlic and cook briefly until fragrant, then pour in the beef broth, scraping the bottom of the pot to release all the flavor.
Season with salt, black pepper, thyme, and bay leaf. Simmer gently for about 20 minutes until the soup is rich and well balanced.
Ladle the soup into oven-safe bowls, top with toasted baguette slices and cheese, then broil until the cheese is melted and bubbly.
Nutrition Facts (approx)
Calories: 420 | Protein: 18g | Carbs: 38g | Fat: 22g
Quick Facts
• one-pot
• cold weather comfort
• family approved
• budget friendly
• freezer friendly
Tips
- Slice the onions evenly so they caramelize at the same pace without burning.
- Cook the onions slowly and patiently, rushing this step reduces flavor depth.
- Toast the bread before adding it to the soup to keep it from getting soggy.
Variations
For a lighter version, reduce the cheese and serve the soup without broiling while keeping the full onion flavor intact.
Add a splash of apple cider vinegar near the end of cooking to brighten the richness and balance the sweetness of the onions.
Turn it into a heartier meal by adding thinly sliced beef during the simmering stage for extra protein. You can even take inspiration from this Grandma’s slow-cooked pot roast for deep, comforting flavors.
Want to take the base broth to the next level? Try making your own using these beef stock recipes for a truly rich and homemade touch.