Simple French Onion Soup

Ingredients

Soup

• 4 tbsp. unsalted butter
• 3 large yellow onions, thinly sliced into half-moons
• 2 tbsp. all-purpose flour
• Kosher salt
• 1/2 c. dry white wine
• 4 c. low-sodium beef stock
• 2 c. low-sodium chicken stock
• 8 sprigs thyme, plus more for serving
• Freshly ground black pepper
• 8 baguette slices
• 1 c. finely shredded Gruyère

Directions

Soup

1. In a large pot over medium heat, melt butter. Add onions and cook, stirring occasionally, until deeply golden brown, 45 to 60 minutes.
2. Add flour and cook, stirring, until incorporated, 1 to 2 minutes; season with salt. Add wine, bring to a simmer, and cook, stirring occasionally, until evaporated, 1 to 2 minutes. Add beef stock, chicken stock, and thyme and bring to a boil. Reduce heat to medium-low and bring to a simmer. Cook, stirring occasionally, until liquid is slightly reduced and flavors have melded, about 15 minutes. Remove thyme; season with salt and pepper.
3. Preheat broiler to high. Ladle soups into heatproof ramekins. Top each with 2 bread slices, then top with cheese. Broil soup, watching closely, until bubbling and golden, 1 to 2 minutes.
4. Top soup with thyme.