How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Caramelized Onion Soup?

You need 13 ingredients. The key ingredients include: 1/4 c. (1/2 stick) unsalted butter, 3/4 lb. white onions, coarsely chopped, 1 lb. red onions, coarsely chopped, 1 lb. leeks (white and pale green parts only), coarsely chopped, and more.

Is Caramelized Onion Soup suitable as soups & stews?

Yes, Caramelized Onion Soup falls under the Soups & Stews category and is a great choice for this type of meal.

How do I store leftover Caramelized Onion Soup?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Caramelized Onion Soup Recipe

Name: Caramelized Onion Soup
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1/4 c. (1/2 stick) unsalted butter; 3/4 lb. white onions, coarsely chopped; 1 lb. red onions, coarsely chopped; 1 lb. leeks (white and pale green parts only), coarsely chopped; 3 large shallots, coarsely chopped; 4 garlic cloves; 1 large bay leaf; 1/2 tsp. dried sage; pinch of dried thyme, crumbled; 2 c. Madeira; 8 c. chicken stock or canned low-salt broth; 1 c. whipping cream; crumbled Stilton cheese or other Blue cheese

Warm up with this hearty Caramelized Onion Soup recipe. Made with butter, white onions, red onions and leeks. Easy step-by-step instructions included.

This Caramelized Onion Soup relies on simple, everyday ingredients such as (1/2 stick) unsalted butter, red onions, coarsely chopped, garlic cloves and large bay leaf. It comes together quickly and makes 4 servings, at about 1335 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It works as a light main on its own or as a starter alongside crusty bread, and it's just as good for a cozy night in as it is for feeding a crowd. Leftovers keep well, so it's a smart choice for meal prep too.

Updated Jun 30, 2026

Serves 4 Soups & Stews

1335

kcal

Calories

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Use a neutral oil or a plant-based spread in place of butter for a dairy-free version.
Coconut cream is a reliable plant-based alternative to dairy cream.

No specific allergen information. Please check the ingredient list for possible allergens.

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Caramelized Onion Soup

Tips for the best results

Variations & substitutions

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