Onion Soup

Onion Soup is a warm, comforting bowl of rich flavors that feels like a hug on a chilly day. The slow-cooked onions develop a deep sweetness, while a light broth keeps it cozy and satisfying. It’s a simple recipe perfect for busy weeknights, relaxed family dinners, or cold evenings when you need something soothing. I like to let the onions caramelize slowly, filling the kitchen with that inviting aroma. This soup proves that with just a few ingredients, you can make something delicious and comforting without spending hours in the kitchen.

a bowl of onion soup with caramelized

Why You Will Love This Recipe

This Onion Soup is flavorful, easy, and versatile, making it a recipe worth saving. The natural sweetness from slow-cooked onions gives it a comforting depth, while the broth keeps it light and satisfying. It’s weeknight-friendly, requiring minimal prep and one pot, and leftovers taste even better the next day. The recipe is budget-friendly and freezer-friendly, perfect for meal prep or a quick cozy dinner. You can adjust herbs or toppings based on what you have on hand, making it flexible for every pantry. It’s a crowd-pleasing, soothing soup that fits both busy evenings and relaxed family nights.

a bowl of onion soup with caramelized 1

Ingredients

  • Tip: Use yellow onions for a naturally sweet flavor and smooth texture.
  • 4 large yellow onions, thinly sliced
  • 2 tablespoons butter
  • 1 tablespoon olive oil
  • 2 cloves garlic, minced
  • 4 cups beef or vegetable broth
  • 1 teaspoon fresh thyme leaves or ½ teaspoon dried thyme
  • 1 bay leaf
  • Salt, to taste
  • Black pepper, to taste
  • Optional: ½ cup shredded Gruyère or Swiss cheese
flat lay of raw ingredients for onion

Instructions

Step 1: Preparation
Peel and thinly slice all onions. Mince the garlic and measure the broth and spices. Having everything ready before turning on the stove helps the cooking process feel smooth and relaxed, especially when caramelizing onions slowly.

Step 2: Main Cooking Process
Heat butter and olive oil in a large pot over medium heat. Add onions and cook slowly until they turn golden brown and sweet, stirring occasionally to prevent burning. The aroma should be rich and inviting.

Step 3: Combining Ingredients
Add minced garlic and cook for 1 minute. Stir in broth, thyme, bay leaf, salt, and pepper. Mix well and bring the soup to a gentle simmer so the flavors can blend evenly without losing the sweetness of the onions.

Step 4: Finishing & Final Simmer
Simmer the soup gently for 15–20 minutes. Taste and adjust seasoning. Remove the bay leaf. Optional: top with shredded cheese just before serving or melt under a broiler for a classic, warm finish that adds richness.

Why This Recipe Works for Busy Days

Onion Soup is simple and forgiving, perfect for busy schedules. It uses a single pot, minimal ingredients, and cooks mostly on its own while you prep other things. It reheats beautifully, making it ideal for leftover lunches or quick dinners later in the week.

Tips & Tricks

  • Cook onions slowly: High heat can burn them, giving a bitter taste. Patience produces a naturally sweet and rich flavor.
  • Stir occasionally: This prevents sticking and ensures even caramelization for a smooth texture.
  • Use a mix of butter and oil: The butter adds flavor while oil prevents the butter from burning.
  • Adjust seasoning at the end: Salt too early can reduce sweetness. Taste after simmering before final seasoning.

Variations

  • Meaty Version: Add small pieces of cooked ham or bacon for a smoky, savory twist. Stir in during the last 5 minutes of simmering to keep the flavor balanced without overwhelming the sweet onions.
  • Vegetarian Option: Use vegetable broth and skip the meat. Add a splash of soy sauce or miso paste for extra depth while keeping the soup light, cozy, and fully plant-based.
  • Ingredient Swap: Try red onions or shallots for a slightly different sweetness and color. They caramelize faster and offer a subtle twist while keeping the soup rich and comforting.
  • Flavor or Herb Boost: Add fresh rosemary or a splash of sherry or white wine near the end. These simple additions enhance aroma and create a more complex flavor profile without changing the base recipe.

Serving Suggestions

  • With Crusty Bread: Serve alongside toasted bread or baguette slices to soak up the broth. This adds texture and makes the meal feel more substantial.
  • Cheesy Finish: Top each bowl with shredded Gruyère or Swiss cheese. Broil briefly for a warm, melty crust for extra comfort.
  • Casual Family Style: Serve directly from the pot, letting everyone ladle their own portion. It’s relaxed and cozy for shared family dinners.
  • Side Salad: Pair with a simple green salad for freshness. The crisp leaves complement the rich, sweet soup for a balanced meal.

Storage Instructions

  • Fridge Storage: Cool completely and store in an airtight container for up to 4 days. Flavors deepen over time, making leftovers extra comforting.
  • Reheating: Warm gently on the stove over low heat. Stir occasionally and add a splash of broth if needed to maintain the texture.
  • Freezing: Freeze in a sealed container for up to 2 months. Avoid freezing if topped with cheese. Thaw overnight before reheating.
  • Make-Ahead Tips: Cook fully and cool before storing. Reheat slowly and top with cheese at the last moment to maintain texture and flavor.

Recipe Timing

  • Prep Time: 10 minutes
  • Cook Time: 40 minutes
  • Rest Time: Not applicable
  • Total Time: 50 minutes

Nutrition Information

Calories: 150–200 per serving depending on broth and cheese
Protein: 4–6 grams per serving
Key nutrients: Vitamin C from onions, small fiber content
Values vary based on portion size and ingredient choices.

FAQs

Yes, it tastes even better the next day after flavors meld.

Cooking onions too quickly can make them bitter instead of sweet.

Vegetable broth works well for a lighter version.

Simmer uncovered for a few extra minutes to reduce liquid naturally.

Up to 4 days in an airtight container.

Conclusion

Onion Soup is simple, cozy, and flexible, making it a staple for chilly evenings or quick weeknight dinners. You can customize it with herbs, toppings, or a splash of wine to suit your taste. It’s forgiving for beginners, reheats beautifully, and fills your kitchen with a warm, comforting aroma. Once you make this Onion Soup, it’s easy to return to whenever you need something soothing, satisfying, and homey.

Onion Soup
Print

Onion Soup

Recipe by Edan Salamon
Servings

4

servings
Prep time

10

minutes
Cooking time

40

minutes
Calories

200

kcal

A cozy, comforting soup with sweet caramelized onions and rich broth. Perfect for chilly nights, weeknight dinners, or simple meal prep.

Ingredients

  • 4 large yellow onions, thinly sliced

  • 2 tablespoons butter

  • 1 tablespoon olive oil

  • 2 cloves garlic, minced

  • 4 cups beef or vegetable broth

  • 1 teaspoon fresh thyme leaves or ½ teaspoon dried thyme

  • 1 bay leaf

  • Salt, to taste

  • Black pepper, to taste

  • Optional: ½ cup shredded Gruyère or Swiss cheese

Directions

  • Prep: Peel and thinly slice onions. Mince garlic and measure broth and spices.
  • Cook Onions: Heat butter and oil in a large pot. Add onions and cook slowly until golden brown and sweet, stirring occasionally.
  • Add Flavor: Stir in garlic, broth, thyme, bay leaf, salt, and pepper. Bring to a gentle simmer.
  • Simmer & Serve: Simmer 15–20 minutes. Remove bay leaf. Optional: top with shredded cheese or melt under a broiler.

Related Posts