Slow Cooker French Onion Soup Recipe (2024)

FAQs

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

My personal go-tos include worcestershire sauce, fish sauce, and brandy. Each deepens the flavor of french onion soup. Balsamic vinegar and soy sauce are other great options.

Spray your slow cooker with a non-stick spray (an olive oil sprayer is great for this as well). Add raw onions into your slow cooker. Drizzle with olive oil then cover and cook on low heat for 10-14 hours.

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.

Slow cookers can transform a few simple ingredients into the most delicious soups by simmering them for hours. This low and slow cooking allows the flavors to mingle, creating rich, flavorful soups perfect for chilly days, nights, or any day you want to enjoy a bowl full of goodness.

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.

Onion soup, at its very essence, is nothing more than onions and water boiled together. Period, done, finished, everything added from that point on is pure opinion. Caramelizing the onions brings out sugars, and makes a more luxurious silky and sweet soup, adding flour gently thickens and provides body.

If you cook red onion with alkaline foods, such as nuts, lentils, and some vegetables, those anthocyanins revert to their blue hue. The same is true of red cabbage. To maintain the red hue, add a little acid, such as a splash of vinegar or a squeeze of lemon juice.

How Long It Takes to Caramelize Onions in a Slow Cooker. It's almost impossible to overcook these onions, but I've found that 10 hours makes soft, lightly browned onions that still have a bit of bite.

This soup traditionally is made with beef stock, though sometimes a good beef stock can be hard to come by and expensive to make. If you use boxed stock, taste it first! If you don't like the taste, don't use it. (If you cook a lot of beef or beef roasts, save the scraps and freeze them to make a stock with later.)

Why is my French onion soup too sweet? ›

Onions are very sweet, especially when they're cooked down, and that is the main purpose of onion soup. The sweetness can be balanced by adding some dry wine or vinegar. Taste as you go and don't overdo it. A little salt will balance it too, but don't forget that the grated cheese you will top it with is salty.

For French onion soup, it is best to slice the onions into thin, even slices. This will allow them to cook evenly and caramelize properly. You can achieve this by cutting the onion in half, placing the flat side down, and slicing it widthwise into thin slices.

"When a slow cooker is too full, it may not heat the food evenly," explains Leal. As a result, some parts of the dish may overcook, while others remain undercooked. "This can also increase the risk of foodborne illness, because the food might not reach a safe temperature throughout," she says.

The short answer: Yes. slow cookers are made to cook food for extensive periods of time (some can be left up to 24 hours). But, of course, follow safe practices outlined in your instruction manual, and keep the appliance on low or warm, as opposed to high, overnight.

That varies by what's inside the slow cooker and also by the appliance's setting and model, the experts say. Most recipes for all-day cooking call for 6 to 8 hours on low. Quality- (and safety-) wise, another 1 to 2 hours in 'keep warm' mode won't mess things up.

Infusing the soup with a richer taste is as easy as quickly sauteing crushed garlic before pouring the soup in. Some soft, buttery garlic sauteed in earthy olive oil is the perfect addition to enrich canned French onion soup.

Use fresh vegetables, high-quality meats or broth, and fresh herbs to add depth of flavor. Add acidity: A squeeze of lemon or lime juice, a dash of vinegar, or a splash of wine can brighten the flavors of a soup and make it taste more complex.

Herbs and sources add flavor, aroma, and intensity to the soup broth. You can pick fresh or dried herbs like basil for tomato-based soups or fresh parsley for clear broths. You may also add more spices like turmeric, ground ginger, ground paprika, or nutmeg for a touch of spice and color to your soup broth.