Caramelized Onion and Blue Cheese Soup

Highlighted under: Comfort Cravings Kitchen

I love making Caramelized Onion and Blue Cheese Soup, especially when the weather turns chilly. The rich, savory aroma that fills my kitchen as the onions gently caramelize is simply irresistible. Each spoonful of this creamy soup evokes a comforting warmth, while the blue cheese adds a unique depth of flavor. Whether enjoyed on a cozy night in or as a starter for a gathering, this soup offers a delightful twist on a classic. Trust me, the blend of sweet and tangy is perfection in a bowl!

Emma

Created by

Emma

Last updated on 2026-01-08T15:50:35.652Z

During one of my culinary experiments, I discovered the magic of caramelized onions when they mix with rich blue cheese. I was skeptical at first, wondering if the sweetness of the onions would overpower the cheese's bold flavor. To my surprise, the blend created a balanced and complex dish that left my guests raving. It’s a perfect example of how contrasting flavors can come together harmoniously.

Another tip I learned along the way is to cook the onions slowly, allowing them to develop their natural sugars. I find that stirring them occasionally prevents burning while promoting even caramelization. The result is a deep, rich flavor that shines through in each delightful bowl of soup.

Why You Will Love This Recipe

  • Rich, deep flavor from perfectly caramelized onions
  • Creaminess balanced with the tang of blue cheese
  • Comforting dish perfect for chilly nights
  • Simple ingredients that create a gourmet experience

The Art of Caramelizing Onions

Caramelizing onions is a technique that requires patience but yields beautiful results. Start on medium heat to allow the onions to cook evenly without burning. Stir them occasionally, scraping the bottom of the pot to release any flavorful bits that cling on. If your onions start to stick, a splash of water or broth can help deglaze the pan, preventing them from burning and enhancing their sweetness as they develop a deep golden color.

The onions’ natural sugars caramelize over time, transforming them into rich, sweet goodness. You’ll know they’re ready when they become soft, golden, and fragrant, usually after about 30 to 35 minutes. Don’t rush this process; it’s essential for building the soup’s flavor foundation.

Texture Matters

For a smooth and creamy texture, you may choose to blend the soup after incorporating the cream and blue cheese. Using an immersion blender directly in the pot can yield great results and make cleanup easier. If you prefer a chunkier soup, simply stir the ingredients together without blending. Both variations allow the distinct flavors of the blue cheese and caramelized onions to shine.

The type of blue cheese you use can also influence the soup's flavor and texture. Stilton will provide a milder taste, while Roquefort adds a sharper bite. Experiment with what you enjoy best, but remember to crumble the cheese well to ensure it melts and integrates smoothly into the soup.

Ingredients

Gather these ingredients to create your delicious soup:

Ingredients

  • 4 large onions, thinly sliced
  • 3 tablespoons olive oil
  • 1 tablespoon butter
  • 4 cups vegetable broth
  • 1 cup heavy cream
  • 150g blue cheese, crumbled
  • Salt and pepper to taste
  • Fresh thyme for garnish

Ensure everything is fresh and ready before starting the cooking process.

Instructions

Follow these steps to prepare your soup:

Caramelize the Onions

In a large pot, heat olive oil and butter over medium heat. Add the sliced onions and a pinch of salt, stirring occasionally. Cook for about 30-35 minutes until the onions turn a deep golden brown.

Add the Broth

Pour in the vegetable broth and bring the mixture to a boil. Reduce the heat and let it simmer for 10 minutes to blend the flavors.

Incorporate Cream and Cheese

Stir in the heavy cream and crumbled blue cheese. Cook for an additional 5 minutes until the cheese melts and the soup is heated through. Season with salt and pepper to taste.

Serve

Ladle the soup into bowls and garnish with fresh thyme. Enjoy your cozy bowl of Caramelized Onion and Blue Cheese Soup!

This soup pairs wonderfully with crusty bread.

Secondary image

Pro Tips

  • For a deeper flavor, add a splash of balsamic vinegar during the caramelization process.

Dietary Substitutions

If you're looking for a lighter version of this soup, consider substituting half of the heavy cream with unsweetened almond milk or a low-fat milk alternative. This adjustment will still provide creaminess without the additional calories. Additionally, for a dairy-free option, use a cashew cream or silken tofu blended with a little vegetable broth to achieve a similar texture.

For those sensitive to gluten, this recipe is inherently gluten-free as it relies on vegetable broth instead of any wheat-based products. Always check labels, as some packaged broths may contain gluten.

Storage and Reheating Tips

This soup can be stored in an airtight container in the fridge for up to three days, making it a great meal prep option. When you're ready to enjoy your leftovers, gently reheat on the stovetop over low heat, stirring occasionally to prevent sticking. If using a microwave, heat in short increments, stirring in between to ensure even warming.

For longer storage, you can freeze the soup for up to three months. To freeze, let the soup cool completely, portion it into freezer-safe bags or containers, and remove as much air as possible before sealing. Thaw overnight in the fridge before reheating, and consider adding a splash of broth or cream to bring back its original texture.

Questions About Recipes

→ Can I prepare this soup in advance?

Yes, you can make the soup a day ahead and reheat it on the stovetop. The flavors will deepen overnight.

→ Can I use a different cheese?

While blue cheese is recommended, you can substitute it with gorgonzola or even goat cheese for a milder flavor.

→ Is there a vegetarian option?

Yes, simply use vegetable broth instead of chicken broth to keep it vegetarian.

→ How can I store leftovers?

Store any leftover soup in an airtight container in the refrigerator for up to 3 days. Reheat gently on the stove.

Caramelized Onion and Blue Cheese Soup

I love making Caramelized Onion and Blue Cheese Soup, especially when the weather turns chilly. The rich, savory aroma that fills my kitchen as the onions gently caramelize is simply irresistible. Each spoonful of this creamy soup evokes a comforting warmth, while the blue cheese adds a unique depth of flavor. Whether enjoyed on a cozy night in or as a starter for a gathering, this soup offers a delightful twist on a classic. Trust me, the blend of sweet and tangy is perfection in a bowl!

Prep Time15 minutes
Cooking Duration45 minutes
Overall Time60 minutes

Created by: Emma

Recipe Type: Comfort Cravings Kitchen

Skill Level: Intermediate

Final Quantity: 4 servings

What You'll Need

Ingredients

  1. 4 large onions, thinly sliced
  2. 3 tablespoons olive oil
  3. 1 tablespoon butter
  4. 4 cups vegetable broth
  5. 1 cup heavy cream
  6. 150g blue cheese, crumbled
  7. Salt and pepper to taste
  8. Fresh thyme for garnish

How-To Steps

Step 01

In a large pot, heat olive oil and butter over medium heat. Add the sliced onions and a pinch of salt, stirring occasionally. Cook for about 30-35 minutes until the onions turn a deep golden brown.

Step 02

Pour in the vegetable broth and bring the mixture to a boil. Reduce the heat and let it simmer for 10 minutes to blend the flavors.

Step 03

Stir in the heavy cream and crumbled blue cheese. Cook for an additional 5 minutes until the cheese melts and the soup is heated through. Season with salt and pepper to taste.

Step 04

Ladle the soup into bowls and garnish with fresh thyme. Enjoy your cozy bowl of Caramelized Onion and Blue Cheese Soup!

Extra Tips

  1. For a deeper flavor, add a splash of balsamic vinegar during the caramelization process.

Nutritional Breakdown (Per Serving)

  • Calories: 320 kcal
  • Total Fat: 24g
  • Saturated Fat: 12g
  • Cholesterol: 70mg
  • Sodium: 450mg
  • Total Carbohydrates: 22g
  • Dietary Fiber: 2g
  • Sugars: 9g
  • Protein: 6g