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America Test Kitchen Beef Broth Onion Soup

In some ways, all French onion soup recipes are almost alike, since the recipe itself is a classic and traditional one. However, some French onion soup recipe are better than others are and if you have ever eaten a truly mouthwatering onion soup in a restaurant and a mediocre one someplace else, you will know this to be true.

The following recipe for French onion soup is similar to the America Test Kitchen beef broth onion soup recipe. A juicy base of chicken broth, beef broth, and red wine accompanies delicious, strong flavored red onions, parsley, and thyme. The topping consists of melted cheese topped French bread slices, which contrast wonderfully with the soup itself.

You can use beef broth instead of chicken and beef broth, if you want to, and also use a different kind of onion if you prefer. White onions are a lot softer in flavor and yellow onions are strong without the eye watering piquancy of red onions. However, the flavor does mellow a lot when they caramelize.

Beef Broth Soup - American Test Kitchen Style

Ingredients -

5 red onions, thinly sliced
1 bay leaf
1 sprig fresh thyme
2 sprigs fresh parsley
2 tablespoons unsalted butter
1 ¾ cups beef broth
6 cups chicken broth
¼ cup dry red wine
1 tablespoon balsamic vinegar
Salt and freshly ground black pepper, to taste
1 French baguette, cut into ¾ inch slices
4 ½ oz Swiss cheese, sliced
3 oz grated Asiago cheese

Preparation:

Melt the butter in a bit pot over a medium high heat and add the onions and ½ teaspoon of salt. Stir well and cook, stirring often, until the onions are syrupy and soft and the bottom of the pot is coated in a dark brown crust.

Stir in the broth, parsley, and thyme, red wine and bay leaf, scraping the bottom of the pot to loosen the burnt bits.

Bring the mixture to a simmer and cook it for 20 minutes.

Discard the herbs.

Stir in the vinegar, adjust the salt, and pepper if necessary.

Set the oven rack in the upper middle position and preheat the broiler.

Put serving bowls on a baking sheet and put 1 ½ cups of soup in each one.

Put a layer of baguette slices on top of each bowl of soup and then the cheese slices and Asiago.

Broil until bubbly and golden brown.

(Serves 8)