Sourdough Croutons French Onion

Featured in: Oven & Pan Recipes

These sourdough croutons bring a golden crunch and tangy depth to your French onion soup. Cubed day-old sourdough bread is tossed in olive oil or melted butter, combined with minced garlic, salt, pepper, and optional herbs. Baked until crisp and optionally topped with melted Gruyère or Emmental cheese, these croutons add texture and richness to every spoonful. Prepare in just 30 minutes and store leftovers in an airtight container for freshness.

Updated on Tue, 17 Feb 2026 19:28:52 GMT
Golden sourdough croutons baked to perfection, ideal for topping rich French onion soup with a crunchy, tangy bite.  Save
Golden sourdough croutons baked to perfection, ideal for topping rich French onion soup with a crunchy, tangy bite. | tislitcravings.com

Sourdough bread brings a unique tang and sturdy structure that makes it the ideal choice for homemade croutons. When tossed with garlic and herbs, these golden cubes become the ultimate garnish for a classic French onion soup, absorbing the savory broth while maintaining a satisfying crunch.

Golden sourdough croutons baked to perfection, ideal for topping rich French onion soup with a crunchy, tangy bite.  Save
Golden sourdough croutons baked to perfection, ideal for topping rich French onion soup with a crunchy, tangy bite. | tislitcravings.com

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These aren't your average store-bought croutons; the combination of high-quality olive oil and sea salt creates a rustic, artisan texture that elevates any bowl of soup to restaurant quality. Each golden cube is infused with garlic, making every bite a savory delight.

Ingredients

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  • Bread
  • 4 cups (about 200 g) sourdough bread, cut into 1-inch cubes (preferably day-old)
  • Flavorings
  • 3 tbsp olive oil (or unsalted butter, melted)
  • 1 garlic clove, minced
  • 1/2 tsp sea salt
  • 1/4 tsp freshly ground black pepper
  • 1/4 tsp dried thyme or herbes de Provence (optional)
  • 1/2 cup (50 g) grated Gruyère or Emmental cheese (optional, for extra richness)

Instructions

Step 1
Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper.
Step 2
In a large bowl, combine olive oil (or melted butter), minced garlic, salt, pepper, and herbs (if using).
Step 3
Add the sourdough cubes to the bowl and toss well until evenly coated.
Step 4
Spread the bread cubes in a single layer on the prepared baking sheet.
Step 5
Bake for 15–18 minutes, stirring once halfway through, until golden and crisp.
Step 6
If desired, sprinkle grated cheese over the hot croutons and return to the oven for 2–3 minutes, until melted and bubbly.
Step 7
Let croutons cool slightly before using as a topper for French onion soup.

Zusatztipps für die Zubereitung

For an even more intense garlic aroma, try rubbing the cut surface of the sourdough bread with a halved garlic clove before you cut it into cubes. Using day-old bread is highly recommended as it has less moisture, leading to a crispier result in the oven that holds up better against hot soup.

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Varianten und Anpassungen

While Gruyère is the traditional choice for French onion soup, you can easily swap it for Comté or Swiss cheese. For a dairy-free version, simply stick to olive oil and omit the cheese entirely. For those with allergies, always check labels if using store-bought bread as it contains gluten.

Serviervorschläge

Place these croutons on top of your French onion soup just before serving. They also work wonderfully as a crunchy addition to salads. Each serving (with olive oil and cheese) contains approximately 210 calories, 10g of fat, 22g of carbohydrates, and 7g of protein.

Crunchy sourdough cubes tossed in garlic and herbs, ready to elevate your French onion soup with savory texture.  Save
Crunchy sourdough cubes tossed in garlic and herbs, ready to elevate your French onion soup with savory texture. | tislitcravings.com

Whether you're hosting a cozy dinner or preparing a quick weeknight meal, these sourdough croutons are the perfect finishing touch. They transform a simple bowl of soup into a gourmet experience with minimal effort and maximum flavor.

Recipe FAQs

What type of bread works best for croutons?

Day-old sourdough bread cubes hold their shape and provide the perfect texture when baked crispy.

Can I use butter instead of olive oil?

Yes, melted unsalted butter adds richness and complements the garlic and herbs beautifully.

How do the herbs influence the croutons?

Dried thyme or herbes de Provence add subtle aromatic notes that enhance the overall flavor depth.

Is it necessary to add cheese on top?

Sprinkling grated Gruyère or Emmental is optional but provides a melty, savory layer for extra indulgence.

How should I store leftover croutons?

Keep cooled croutons in an airtight container at room temperature for up to three days to maintain crunchiness.

Can croutons be made dairy-free?

Yes, skip the cheese and use olive oil instead of butter to keep them suitable for dairy-free diets.

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Sourdough Croutons French Onion

Golden, crunchy sourdough croutons enhance French onion soup with a tangy, herb-infused touch.

Prep time
10 minutes
Time to cook
20 minutes
Total duration
30 minutes
Author Wyatt OBrien


Skill level Easy

Cuisine French

Portions 4 Serving size

Diet details Vegetarian-friendly

What You Need

Bread

01 4 cups sourdough bread, cut into 1-inch cubes, preferably day-old

Flavorings

01 3 tablespoons olive oil or unsalted butter, melted
02 1 garlic clove, minced
03 1/2 teaspoon sea salt
04 1/4 teaspoon freshly ground black pepper
05 1/4 teaspoon dried thyme or herbes de Provence, optional
06 1/2 cup grated Gruyère or Emmental cheese, optional

Directions

Step 01

Preheat and prepare: Preheat oven to 375°F and line a baking sheet with parchment paper.

Step 02

Create coating mixture: In a large bowl, combine olive oil or melted butter, minced garlic, salt, pepper, and herbs if using.

Step 03

Coat bread cubes: Add sourdough cubes to the bowl and toss thoroughly until evenly coated with the oil mixture.

Step 04

Arrange on baking sheet: Spread coated bread cubes in a single layer on the prepared baking sheet.

Step 05

Bake croutons: Bake for 15 to 18 minutes, stirring once halfway through, until golden and crisp.

Step 06

Add cheese topping: If desired, sprinkle grated cheese over hot croutons and return to oven for 2 to 3 minutes until melted and bubbly.

Step 07

Cool before serving: Let croutons cool slightly before using as a topper for French onion soup.

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Tools Needed

  • Large mixing bowl
  • Baking sheet
  • Parchment paper
  • Knife and cutting board

Allergy notice

Review all ingredients for allergens and reach out to a healthcare provider if unsure.
  • Contains gluten from wheat bread
  • Contains dairy if cheese or butter is used
  • Always verify labels on store-bought bread and cheese products

Nutritional facts (per serving)

Nutritional values provided as a guide—always check with a specialist for health needs.
  • Caloric value: 210
  • Fat content: 10 g
  • Carbohydrates: 22 g
  • Proteins: 7 g

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