crockpot onion soup recipe

Written ByJenny Smyth Posted on
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The Best crockpot onion soup recipe

This crockpot onion soup recipe has been a staple in our household for years. I first discovered it when my sister-in-law shared it with me after a family gathering.

It was love at first sip – the combination of caramelized onions, rich beef broth, and aromatic thyme was absolute perfection. I’ve tweaked the recipe over the years to suit our tastes, but the core ingredients remain the same.

This soup is perfect for a chilly evening or a quick weeknight meal. The best part?

It’s incredibly easy to make and requires minimal effort from me, which is always a win in my book. I love serving this soup with crusty bread or over rice for a filling meal.

The flavors meld together beautifully, and the aroma is simply divine. My kids devour it like wolves, and my husband requests it whenever he’s feeling under the weather.

As for me, I adore it because it’s a healthy option that still satisfies our cravings. Plus, it’s an excellent way to get some vegetables into our diet without feeling like we’re eating ‘rabbit food.’

Crockpot French Onion Soup

4.5 from 671 votes

A rich and comforting French onion soup made effortlessly in the crockpot. Caramelized onions, beef broth, and melted cheese on toasted bread make up this classic dish.

Prep Time15 mins
Cook Time8 hours
Resting Time0 mins
Total Time8 hours 15 mins
Servings: 4Cuisine: InternationalCalories: 350 kcal

🥘Ingredients

For the Soup

2 lbs yellow onions, thinly sliced
2 tbsp butter
2 tbsp olive oil
4 cloves garlic, minced
2 tbsp all-purpose flour
6 cups beef broth
1 tsp salt
1/2 tsp black pepper
1 tsp dried thyme

For the Topping

4 slices baguette
1 cup grated Gruyere cheese
1/4 cup grated Parmesan cheese

👨‍🍳Directions

1Place the butter and olive oil in the crockpot on high heat until the butter is melted and the oil is hot.
2Add the sliced onions and cook for 30 minutes, stirring occasionally until the onions are soft and lightly browned.
3Add the minced garlic to the crockpot and cook for an additional 5 minutes, stirring frequently to prevent burning.
4Sprinkle the flour over the onion mixture and stir to combine.
5Cook for 2 minutes, stirring constantly.
6Gradually pour in the beef broth while stirring continuously.
7Add the salt, black pepper, and dried thyme.
8Stir well to combine all ingredients.
9Cover and cook on low heat for 6-8 hours until the flavors are well combined and the onions are very soft.
10The soup should have a rich, deep flavor and the onions should be very tender.
11Preheat the broiler to high.
12Place the baguette slices on a baking sheet and broil for 2-3 minutes, turning once, until the bread is toasted and lightly golden.
13Sprinkle the grated Gruyere and Parmesan cheese evenly over the toasted bread.
14Broil for an additional 2-3 minutes, or until the cheese is melted and bubbly.
15Ladle the hot soup into oven-safe bowls.
16Place two slices of the cheese-topped baguette on top of each bowl.
17Return the bowls to the broiler for 1-2 minutes, or until the cheese is fully melted and lightly golden.
18Serve immediately while hot.

🔧Equipment

Crockpot
Cutting board
Knife
Spoon

📊Nutrition Facts (per serving)

🔥Calories: 350 kcal🧈Total Fat: 15g💛Saturated Fat: 8g❤️Cholesterol: 35mg🧂Sodium: 1200mg🌾Total Carbs: 35g🥦Dietary Fiber: 4g🍬Sugars: 10g🥩Protein: 18g

📝Notes

Tips: For a spicier soup, add a pinch of cayenne pepper. You can also garnish with fresh parsley before serving.

I’ve found that this crockpot onion soup recipe is perfect for any occasion – whether it’s a quick weeknight meal or a special gathering with friends and family. The key to making this recipe shine lies in its simplicity and versatility.

You can serve it hot or cold, with crusty bread or over rice, and adjust the seasoning to suit your taste preferences. One of my favorite ways to enjoy leftover soup is by reheating it with some fresh herbs and serving it over egg noodles or rice.

It’s also an excellent way to repurpose last night’s dinner into something new and exciting.

❓ Frequently Asked Questions About Crockpot French Onion Soup

Q: What type of onions are best for this recipe?

For this crockpot onion soup recipe, I recommend using yellow or white onions as they caramelize nicely and add a depth of flavor to the soup.

Q: Can I use beef broth instead of stock?

Yes, you can use beef broth as a substitute for stock in this recipe. In fact, beef broth will give your soup a richer flavor profile.

Q: Do I need to soak the onions before adding them to the crockpot?

No, soaking the onions is not necessary before adding them to the crockpot.

Q: How long does it take to cook this soup?

The cooking time for this crockpot onion soup recipe is approximately 6-8 hours on low heat or 3-4 hours on high heat.

Q: Can I add other ingredients to customize this recipe?

Absolutely! Feel free to add your favorite herbs and spices to make this recipe your own.

Q: How do I store leftover soup?

You can store leftover soup in an airtight container in the refrigerator for up to 3 days or freeze it for up to 2 months.

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