This post may contain affiliate links. Please read our disclosure policy.

Longing for a bowl of rich, savory, and cheesy French Onion Soup but don’t want to make a large pot? You’ve come to the right place! This single serving French Onion Soup recipe is the ultimate comfort food, capturing the essence of a Parisian bistro experience in one cozy bowl. It’s simple, satisfying, and perfect for anyone cooking for one or two people.

French Onion Soup can be a hearty meal on its own. For added variety, consider pairing it with a fresh Italian Chopped Salad, a single serving Crustless Quiche Lorraine, or an extra slice of homemade French Bread.

Why You’ll Love This French Onion Soup Recipe

  • Simple Ingredients: Made with just one onion and everyday pantry items, this recipe is as uncomplicated as it is delicious.
  • Comforting: The gooey cheese and hearty broth make this a perfect comfort food.
  • Restaurant-Quality: Savor the richness and complexity in every spoonful, comparable to a high-end restaurant serving.
  • Recipe can be doubled: This small batch soup recipe yields one large bowl of soup but if you’d like to make a second bowl, just double the ingredient amounts.

Watch How To Make This Soup

What Is French Onion Soup?

Originating from France, as the name suggests, French Onion Soup is a soul-warming dish featuring caramelized onions in a robust broth, topped with toasted bread and melted cheese.

Ingredients

For the best results in your single serve French Onion Soup, pay close attention to the ingredients you select. Here’s what you need:

  • Butter: It adds a layer of seasoning while sautéing the onions.
  • Onion: Choose one small yellow onion and slice it thinly for the perfect caramelization. Yellow onions are naturally sweet, making them ideal for this dish.
  • Garlic: A single clove delivers a subtle yet impactful aroma and flavor.
  • Seasonings: Opt for dried thyme, salt, and black pepper. These classic seasonings enhance the soup’s overall profile.
  • Red wine: Ideal for deglazing the pan and adding depth of flavor. If you’d rather skip the alcohol, using broth is a perfectly fine alternative.
  • Flour: All-purpose flour is my go-to for thickening the soup. If you’re following a gluten-free diet, a gluten-free blend works just as well.
  • Broth: While beef broth is traditional in French Onion Soup, quality store-bought options can be elusive. To avoid a metallic aftertaste, I use chicken broth for a consistently delicious outcome.
  • French bread and cheese: Gruyere is the cheese of choice for authenticity. But don’t worry if you don’t have it on hand; Gouda, Swiss, Fontina, or Mozzarella make great substitutes.

If you have any ingredients leftover from this French Onion Soup recipe, check out our Leftover Ingredients Recipe Finder

For this soup recipe, I use a 2-quart saucepan. For best results use a pot of similar size.

RELATED: Single Serving Comfort Food Recipes

A spoonful of french onion soup from a bowl on a metal tray with a glass and bottle of red wine.

The Art Of Caramelizing Onions For French Onion Soup

Caramelizing onions is the cornerstone of creating a luscious French Onion Soup. This process magically turns raw onion slices into sweet, sumptuous morsels that act as the dish’s flavorful foundation.

For this single serving recipe, you’ll need just one small onion, although the size isn’t a deal-breaker. Whether small or medium, you can’t really go wrong—the more onion goodness, the better the soup will be.

Start by slicing your onion into thin strips. Place these into a saucepan with melted salted butter and let the caramelization begin. During slow cooking, the onions release their natural sugars, giving them a delectable sweetness that elevates any dish they’re a part of. In terms of timing, aim for 25 minutes to achieve that perfect caramelized texture for this soup.

Save This Recipe!
Get this sent to your inbox, plus get weekly recipes from us – all for free.

How To Make French Onion Soup

See the recipe box below for ingredient amounts and full recipe instructions.

  1. Melt the butter in a 2-quart saucepan over medium heat. Add the onions, garlic, thyme, salt and pepper and cook until the onions are very soft and caramelized, about 25 minutes.
  2. Add the wine, bring to a boil, reduce the heat and simmer until the wine has evaporated, about 5 minutes.
  3. Sprinkle the flour over the onions and stir. Reduce the heat to medium-low and cook for 10 minutes, stirring occasionally so that the flour doesn’t burn.
  4. Stir in the chicken broth and bring the soup back to a simmer, cook for 10 minutes.
  5. Taste and add additional salt, if necessary.

Prepping The Perfect Bread For Your French Onion Soup

Looking to elevate your French Onion Soup game? The bread matters—here’s how to prep the perfect slice that’ll complement your soup without stealing the spotlight.

While the soup is simmering, prepare the bread.

  1. Heat the broiler. Place the slice of French bread on a baking sheet. Sprinkle the Gruyere cheese over the top and broil until bubbly and golden brown, 3-4 minutes.
  2. Place the bread in a soup bowl and pour the soup over the top. 
a wedge of french bread topped with melted cheese on a baking sheet.

Expert Tips

  • Gruyere Cheese: For that quintessential French Onion Soup flavor, you can’t go wrong with Gruyere. Its meltability and rich, smooth texture make it the top choice. For other cheese options, check out our Ingredient Notes.
  • Choosing the Right Broth: Traditional recipes call for beef broth, but a high-quality store-bought version is often elusive. Many tend to have a metallic tang. To guarantee a satisfying soup, opt for chicken broth instead.

RELATED: The Best Soup Recipes For One

Frequently Asked Questions

Which type of onion is best for French Onion Soup?

Yellow, white, or red onions can all be used in making French Onion Soup. However, I lean towards sweet yellow onions for their balanced flavor profile.

What should I do with the leftover wine from this French Onion Soup recipe?

If you find yourself with extra wine after cooking (it happens), you have a couple of options. For those who don’t drink wine regularly, try freezing it in ice cube trays. Next time you need a splash for a recipe, simply pop out a wine cube.

Do I have to make French Onion Soup with wine?

Not a fan of cooking with wine? No worries! While wine adds depth, it’s not essential. Feel free to use dry vermouth, brandy, or even just extra broth to deglaze the pan, as noted in the recipe steps.

What’s the best way to store and reheat French Onion Soup?

You can store the soup sans the cheesy bread in an airtight container in the fridge for up to 3-4 days. To reheat, simply bring it to a boil on the stovetop. The cheesy bread should be prepared fresh for the best experience.

More Single Serving Soup Recipes You’ll Love

Looking for more comforting, easy-to-make single serving soup recipes? Check out these culinary gems perfect for anyone cooking for one.

Ways To Use Leftover Ingredients

If you have any ingredients leftover from this recipe, check out our Leftover Ingredients Recipe Finder or you might like to consider using them in any of these single serving and small batch recipes:

If you would like additional information on the cooking and baking dishes I use in our “recipes for one”, please visit our FAQ page.
For examples of the dishes used at One Dish Kitchen, please visit our Store page.

If you’ve tried this small batch French onion soup or any recipe on One Dish Kitchen please let me know how you liked it by rating the recipe and telling me about it in the comment section below.

If you take a picture please tag us on Instagram (@onedishkitchen) we’d love to see it!


Your Cooking For One Source
Because you’re worth it

French Onion Soup For One

4.93 from 27 votes
Prep: 10 minutes
Cook: 50 minutes
Total: 1 hour
Servings: 1 serving
Indulge in a comforting bowl of French Onion Soup. Rich, savory, and topped with melted cheese, this easy soup recipe brings gourmet flavor to your kitchen.

Ingredients 
 

  • 3 tablespoons salted butter
  • 1 small yellow onion , halved lengthwise, then thinly sliced
  • 1 clove garlic , chopped
  • ½ teaspoon dried thyme
  • ¼ teaspoon kosher salt
  • teaspoon coarsely ground black pepper
  • ¼ cup red wine
  • 1 tablespoon all-purpose flour
  • 2 cups low sodium chicken broth
  • 1 thick slice French bread
  • ¼ cup shredded Gruyere cheese
Save this Recipe!
Get this recipe sent to your inbox, plus get weekly recipes from us – all for free.

Instructions 

  • Melt the butter in a 2-quart saucepan over medium heat. Add the onions, garlic, thyme, salt and pepper and cook until the onions are very soft and caramelized, about 25 minutes.
  • Add the wine, bring to a boil, reduce the heat and simmer until the wine has evaporated, about 5 minutes.
  • Sprinkle the flour over the onions and stir. Reduce the heat to medium-low and cook for 10 minutes, stirring occasionally so that the flour doesn’t burn.
  • Stir in the chicken broth and bring the soup back to a simmer, cook for 10 minutes.
  • Taste and add additional salt, if necessary.
  • Heat the broiler. Place the slice of French bread on a baking sheet. Sprinkle the Gruyere cheese over the top and broil until bubbly and golden brown, 3-4 minutes.
  • Place the bread in a soup bowl and pour the soup over the top. 

Notes

  • Gruyere Cheese: For that quintessential French Onion Soup flavor, you can’t go wrong with Gruyere. Its meltability and rich, smooth texture make it the top choice. For other cheese options, check out our Ingredient Notes.
  • Choosing the Right Broth: Traditional recipes call for beef broth, but a high-quality store-bought version is often elusive. Many tend to have a metallic tang. To guarantee a satisfying soup, opt for chicken broth instead.

Nutrition

Serving: 1serving, Calories: 628kcal, Carbohydrates: 21g, Protein: 21g, Fat: 47g, Saturated Fat: 28g, Cholesterol: 126mg, Sodium: 1145mg, Potassium: 584mg, Fiber: 1g, Sugar: 4g, Vitamin A: 1365IU, Vitamin C: 6.1mg, Calcium: 379mg, Iron: 2.2mg

The information shown is an estimate provided by an online nutrition calculator. It should not be considered a substitute for a professional nutritionist’s advice.

Receive Our Latest Single Serving Recipes!
Sign Up for the weekly One Dish Kitchen Newsletter!!

Red 5-inch square baking dish with One Dish Kitchen branded paper sleeve around it.

Make 80+ Recipes With This Dish!

Ideal for home chefs, this individual square ceramic baking dish is safe for oven, microwave, freezer, and dishwasher. Simple to use & easy to clean!

Welcome!

I’m Joanie and I’m incredibly happy you’re here! Our aim is to inspire individuals with access to single serving recipes, education, and a supportive community that will enable them to enjoy the preparation of a meal that will nourish both body and soul.

Leave a comment

Your email address will not be published. Required fields are marked *

Recipe Rating




48 Comments

  1. Jubilet says:

    Made this today for lunch– tasted great and was exactly what I was craving. The recipe was easy to follow and the result was so good I almost wish I had leftovers!

  2. J. Hegyi says:

    Terrific recipe.

  3. Linds says:

    This was decadent and delicious. Thanks for the recipe! I made a few tweaks: deglazed pan with an aged balsamic vinegar, substituted Italian seasoning for the thyme (because I didn’t have any thyme on hand), and used shredded mozzarella cheese for the bread.

  4. Christina says:

    This tasted amazing!