📖 Instructions

1. Prep the Onions: Peel and thinly slice about 3 pounds of yellow onions. The thinner, the better for even caramelization. This is the most tedious part, I won't lie, but put on some music! Or binge watch something!
2. Caramelize the Onions: In a large, heavy-bottomed pot or Dutch oven, melt 4 tablespoons of butter over medium-low heat. Add the sliced onions, 1 teaspoon of salt, and 1/2 teaspoon of sugar. Stir well to coat the onions in butter.
3. Cook the Onions: Cook the onions, stirring occasionally, for about 45-60 minutes, or until they are deeply golden brown and caramelized. This process requires patience. Don't increase the heat to speed things up; low and slow is the key to developing that sweet, rich flavor. If the onions start to stick to the bottom of the pot, add a splash of water or broth and scrape up any browned bits. This adds even more flavor!
4. Add Aromatics: Once the onions are caramelized, add 4 cloves of minced garlic and cook for another minute until fragrant. Be careful not to burn the garlic; burnt garlic is not a good flavor!
5. Deglaze the Pot: Pour in 1/2 cup of dry red wine (like a Burgundy or Cabernet Sauvignon) and scrape up any remaining browned bits from the bottom of the pot. Let the wine reduce for a few minutes.
6. Add Broth and Seasonings: Pour in 8 cups of beef broth (low sodium is preferred). Add 2 teaspoons of dried thyme, 1 bay leaf, and a pinch of black pepper. Bring the soup to a simmer.
7. Simmer the Soup: Reduce the heat to low, cover, and simmer for at least 30 minutes, or up to an hour, to allow the flavors to meld together. The longer it simmers, the richer the flavor will become.
8. Taste and Adjust: Taste the soup and adjust seasonings as needed. You may need to add more salt, pepper, or thyme to taste. Don't be afraid to experiment!
9. Prepare the Bread: While the soup is simmering, slice a baguette into 1-inch thick rounds. Brush the baguette slices with olive oil and toast them in a toaster oven or under the broiler until golden brown. Watch them carefully so they dont burn!
10. Grate the Cheese: Grate about 8 ounces of Gruyère cheese. Gruyère is the classic choice, but you can also use Swiss or a combination of both.
11. Assemble the Soup: Ladle the hot soup into oven-safe bowls. Place a toasted baguette slice on top of each bowl and generously pile on the grated Gruyère cheese.
12. Broil the Soup: Place the bowls under the broiler until the cheese is melted and bubbly, about 2-3 minutes. Watch carefully so the cheese doesn't burn!
13. Serve Immediately: Remove the bowls from the broiler and let them cool slightly before serving. Be careful; the bowls will be very hot! Serve and enjoy the symphony of flavors.