Creamy Onion Soup With Egg Yolks

Ingredients

• 2 tablespoons butter
• 4 large onions, peeled and sliced
• 1 tablespoon all-purpose flour
• 1 ½ cups boiling milk
• Salt and black pepper to taste
• 2 egg yolks
• ½ cup heavy cream

Method

1. 1 Melt butter in a large pot over medium heat. Add sliced onions and simmer for 30 minutes without browning.
2. 2 Stir in flour and cook until thickened. Gradually pour in boiling milk while stirring constantly.
3. 3 Season with salt and pepper. Press the soup through a fine-mesh sieve back into the pot and heat gently.
4. 4 Whisk egg yolks and cream in a separate bowl. Temper by slowly adding hot soup to the egg mixture.
5. 5 Remove soup from heat and stir in the egg mixture. Serve immediately in a tureen.