French Onion Mushroom Soup Recipe with caramelized vegetables. (2024)

FAQs

How do you deepen the flavor of French onion soup? ›

A few sprigs of thyme and a bay leaf elevate the soup even more, but I take it a step further, adding a splash of fish sauce for complexity and depth—don't worry, it won't taste fishy—and a hit of cider vinegar to balance some of that oniony sweetness.

The key to good French onion soup is to cook the onions so long that they threaten to melt into a viscous, dark brown paste, à la Marmite.

The easiest way to thicken your French onion soup is with flour. You can also use cornstarch if you don't have any flour. Remember to never add the flour or cornstarch directly to the soup – otherwise you run the risk of it clumping.

The caramelized onions for this soup cook more quickly due to a pinch of baking soda but still have that deep, slow-cooked flavor. Topping the soup with hot, cheesy toasts prepared while the soup simmers, eliminates the need to bake the soup in specialty French onion soup bowls.

Most likely it could be from not caramelizing the onions long enough, as this is crucial for flavor development. Also, be sure to use a good quality broth and season the soup properly with salt and pepper. You can try adding a splash of balsamic vinegar or Worcestershire sauce for a boost of flavor.

Perk up a Bland Soup With Simple Pantry Staples

Add a splash of vinegar (any kind!), or a squeeze of citrus. Chances are, you could use a little more salt. Go ahead—it's ok. Salt perks up flat flavors and helps balance out bitter-tasting ingredients.

French Onion Soup is probably one of the most epic soups in this whole wide world. And yet, the soup itself is made with very few core ingredients: butter, onions, flour and stock/broth. The magic is in the caramelisation of the onions, cooked slowly for at least 40 minutes.

French onion soup is traditionally served in lionhead bowls, which are deep but not very wide porcelain bowls. Here are four reasons why these bowls are perfect: Plenty of soup. Even as the bread on top starts to soak up some of the soup, there's still plenty left underneath.

You can caramelize any kind of onion, but yellow or Spanish onions tend to offer the most balanced-sweet-savory flavor profile and are the most versatile for different dishes. Sweet onions, such as Vidalia or Walla Walla work too, but keep in mind that their flavor will become even sweeter once caramelized.

What is the Difference Between Onion Soup and French Onion Soup? French onion soup is always made with beef stock. Other onion soups can be made with chicken, vegetable, or beef stock. Additionally, French onion soup typically contains wine or sherry, which isn't typical or necessary in other onion soups.

Why add flour to French onion soup? ›

Flour: a little all-purpose flour will help to thicken the soup. You can feel free to use gluten-free flour. Dry white wine: this helps to deglaze the pan and add a boost of flavor.

Another option for thickening soup is by using dairy like sour cream or yogurt. Start with a small dollop and stir before checking the consistency and adding more. We recommend using plain yogurt so you don't alter the taste of the soup. You can also use cream if you prefer.

Add salt and pepper to taste, but don't be shy with the amounts. French onion soup requires a good amount of seasoning to bring out its true flavors. Enhance the taste with herbs and spices. Traditional herbs like thyme and bay leaves work exceptionally well in French onion soup.

Wine is optional to deglaze the pan and add flavour to the soup. I recommend a dry white or red wine, such as a good quality Pinot Grigio/Gris, Sauv Blanc, Sémillon, Chardonnay, Merlot or Pinot Noir. Generally, if you can't drink it, don't cook with it.

In this case, however, the lemon provides more of a flavor undertone that enhances other seasonings like thyme, parsley, and turmeric. According to trained chef Leetal Arazi, who spoke with Real Simple, you can bring a "zesty flavor" to your soup simply by adding lemon.

If you don't add enough salt, pepper, or other herbs and spices, the soup may taste bland.

Some fresh rosemary or thyme brings a woody, peppery taste to the soup, complementing the umami flavor of the beef stock. With a splash of balsamic vinegar and green onions or fresh basil as a garnish, the canned soup is transformed from a grocery store original into a gourmet dish.

You can extract a clean, strong broth from a combination of water and several pantry ingredients. It's all about layering powerful flavor-enhancers that you probably already have on hand—bacon, tomato paste, herbs, peppercorns, a Parmesan rind, and, of course, kosher salt.

Soak in Vinegar: It only takes about 15 minutes. Soaking raw onions in acid rinses away the harsh flavors and adds pleasant tartness. Soak in Water: Even water washes away those pesky sulfuric flavors. A quick 15-minute soak does the trick.