French Onion Soup | culture: the word on cheese

Ingredients

• 3 tablespoons unsalted butter
• 2 pounds yellow onions (thinly sliced (about 10 medium onions))
• 2 ounces Calvados (or another brandy or Cognac)
• 3 cups chicken stock
• 3 cups beef stock
• 2 bay leaves
• 2 sprigs fresh thyme
• Kosher salt (to taste)
• Ground black pepper (to taste)
• 8 slices baguette (toasted)
• 1 cup grated Gruyère