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French Onion Soup · Classic

Classic French Onion Soup

6

Hands-free cooking

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Before you start

Gather your ingredients

  • Swaps for yellow onions

    Instead of onion

    • Another onion: The same amount. Yellow is the all-rounder; white is sharper and crisper; red is milder raw and adds color; sweet onions are mildest.
    • Shallots: The same amount, chopped. Milder and sweeter, with a hint of garlic.
    • Leeks: About 1½ times as much, white and light green parts. Milder and softer when cooked.

    All 4 swaps for onion

  • Swaps for unsalted butter

    Instead of butter

    • Salted butter: The same amount, with about ¼ tsp less salt per stick (½ cup) elsewhere in the recipe. Nothing noticeable once you cut the salt.
    • Plant-based butter sticks: The same amount. The closest swap.
    • Refined coconut oil: The same amount: solid when the butter is soft or cold, melted when it is melted. It is all fat, so bakes are a bit more tender and rich, with no butter flavor.

    All 4 swaps for butter

    Cooking for an allergy? Check every label.

  • Swaps for olive oil

    Instead of olive oil

    • Avocado oil or another neutral oil: The same amount. No olive flavor; avocado oil handles higher heat.
    • Butter: The same amount. Richer and nutty when browned.
    • A neutral oil + more seasoning: The same amount. Dressings lose the fruity, peppery note; a little extra lemon, garlic or mustard makes up for it.

    More for olive oil

  • Swaps for kosher salt

    Instead of salt

    • Table salt or fine sea salt: About half as much as Diamond Crystal kosher, about ¾ as much as Morton kosher. The same saltiness when measured this way.
    • Salt by weight: 1 tsp is about 6 grams of table salt, 5 grams of Morton kosher, 3 grams of Diamond Crystal kosher. The most reliable way to swap, especially in baking and brines.

    More for salt

  • Swaps for garlic

    Instead of garlic

    • Garlic powder: ⅛ tsp for each clove. Mellower and sweeter, with no bite.
    • Jarred minced garlic: ½ tsp for each clove. Milder and slightly sour from the preserving liquid.

    More for garlic

  • Swaps for all-purpose flour

    Instead of all-purpose flour

    • Gluten-free 1:1 baking flour: The same amount, a blend that includes xanthan gum. A little grittier and more crumbly, browns faster and dries out sooner.
    • Bread flour: The same amount. More gluten: chewier cookies and bread, tougher cakes.
    • Whole wheat flour: Up to half of the flour. Nuttier, darker and denser.

    All 4 swaps for all-purpose flour

    Cooking for an allergy? Check every label.

  • Swaps for dry white wine

    Instead of white wine

    • Broth + vinegar or lemon juice: The same amount of chicken or vegetable broth, plus 1 tsp white wine vinegar or lemon juice per cup. Savory and bright; a little less fruity.
    • Dry vermouth: The same amount. Herbal and a bit stronger.
    • White grape juice + vinegar: Half white grape juice and half broth, plus a splash of vinegar. Sweeter; fine in small amounts.

    All 4 swaps for white wine

    Cooking doesn't burn off all the alcohol: a dish simmered 15 minutes can keep close to half of it, and even after 2 hours some is left. Use an alcohol-free swap for anyone who avoids alcohol.

  • Swaps for beef broth

    Instead of broth

    • Vegetable broth: The same amount. Lighter and slightly sweeter.
    • Chicken broth: The same amount. Richer and more savory; not vegetarian.
    • Bouillon cube, powder or paste + water: Follow the label for the amount of liquid. Close in flavor; a little saltier.

    All 4 swaps for broth

  • Swaps for dried thyme

    Instead of thyme

    • Fresh thyme: 1 tbsp chopped fresh for each 1 tsp dried (three times as much). Brighter and more lemony.
    • Italian seasoning or dried marjoram: The same amount. Close; Italian seasoning adds oregano and basil.

    More for thyme

  • Swaps for worcestershire sauce

    Instead of Worcestershire sauce

    • Soy sauce + vinegar: 1 tbsp soy sauce + ¼ tsp vinegar + a pinch of sugar for each 1 tbsp. Savory and tangy, less complex.
    • Vegan Worcestershire: The same amount. Very close, with no anchovies.

    More for Worcestershire sauce

Step 1 of 13

Melt the butter with the oil in a Dutch oven over medium heat.

Step 2 of 13

Add the onions and salt and stir to coat. Cover and cook, stirring once or twice, until the onions have softened and released their liquid.

Step 3 of 13

Uncover, lower the heat to medium-low and cook, stirring and scraping the bottom every 5 minutes, until the onions are deep golden brown. Add a splash of water if the bottom starts to scorch.

Step 4 of 13

Add the garlic and stir until fragrant.

Step 5 of 13

Sprinkle in the flour and stir to coat.

Step 6 of 13

Pour in the wine and
scrape up the browned bits (how to deglaze) Deglaze Pour liquid into a hot pan and scrape up the browned bits stuck to the bottom, which hold a lot of flavor. 1. After browning, pour off all but a spoonful of fat.2. With the pan still hot, pour in wine, broth or water; it will sizzle and steam.3. Scrape the bottom with a wooden spoon or flat spatula until the brown layer dissolves.4. Let it bubble down, as the recipe says, into the base of a sauce. Done when: The bottom of the pan is clean and the liquid has turned brown and tasty. Safety: Take the pan off the flame before pouring in wine or spirits, and turn your face away from the steam.How to deglaze a pan: mistakes to avoid
, then
simmer (how to simmer) Simmer Cook liquid just below a boil, with small bubbles breaking the surface now and then. 1. Bring the liquid up over medium-high heat.2. As soon as bubbles rise steadily, turn the heat down.3. Adjust until only a few small bubbles break the surface every second or two.4. Stir now and then and check that it hasn't crept back to a boil. Done when: You see lazy, small bubbles, not a rolling boil. A "bare" simmer has just a bubble here and there. Safety: Steam burns fast: lift lids and foil away from your face, tipping the far edge up first.How to simmer: mistakes to avoid
until nearly gone.

Step 7 of 13

Add the broth, thyme, bay leaf, Worcestershire if using and pepper. Bring to a
boil (how to boil) Boil Heat liquid until big bubbles rise and break all over the surface. 1. Use a pot big enough that the water fills it no more than three quarters.2. Cover it to boil faster, over high heat.3. Salt pasta or vegetable water once it boils.4. Add the food, stir, and bring it back to a boil before you start timing. Done when: A rolling boil keeps bubbling hard even when you stir. Safety: Turn pot handles toward the back of the stove, and drain pasta into a colander in the sink, pouring away from you. Steam burns fast: lift lids and foil away from your face, tipping the far edge up first.How to boil water for pasta and vegetables: mistakes to avoid
, then lower the heat and
simmer (how to simmer) Simmer Cook liquid just below a boil, with small bubbles breaking the surface now and then. 1. Bring the liquid up over medium-high heat.2. As soon as bubbles rise steadily, turn the heat down.3. Adjust until only a few small bubbles break the surface every second or two.4. Stir now and then and check that it hasn't crept back to a boil. Done when: You see lazy, small bubbles, not a rolling boil. A "bare" simmer has just a bubble here and there. Safety: Steam burns fast: lift lids and foil away from your face, tipping the far edge up first.How to simmer: mistakes to avoid
.

Step 8 of 13

While the soup
simmers (how to simmer) Simmer Cook liquid just below a boil, with small bubbles breaking the surface now and then. 1. Bring the liquid up over medium-high heat.2. As soon as bubbles rise steadily, turn the heat down.3. Adjust until only a few small bubbles break the surface every second or two.4. Stir now and then and check that it hasn't crept back to a boil. Done when: You see lazy, small bubbles, not a rolling boil. A "bare" simmer has just a bubble here and there. Safety: Steam burns fast: lift lids and foil away from your face, tipping the far edge up first.How to simmer: mistakes to avoid
, heat the oven to 400°F (200°C). Bake the baguette slices on a sheet pan until dry and crisp.

400°F

Step 9 of 13

Remove the bay leaf. Taste and add salt if needed.

Step 10 of 13

Turn the oven to
broil (how to broil) Broil Cook or brown food with strong heat from the top of the oven, like an upside-down grill. 1. Move an oven rack so the food will sit 3 to 6 inches from the heat.2. Turn the broiler on and give it a few minutes to heat.3. Use a metal pan (never glass that isn't broiler-safe) and put the food in.4. Stay at the oven and check every minute; things go from brown to burnt fast.5. Turn the food if the recipe says to. Done when: The top is browned and bubbly or charred in spots, usually in 1 to 5 minutes. Safety: Don't use parchment or wax paper under the broiler; it can catch fire. Use foil or a bare pan.How to broil: mistakes to avoid
on high. Set 6 oven-safe soup crocks on a sheet pan.

Step 11 of 13

Ladle the soup into the crocks, float 2 toasts in each and pile the cheese on top so it covers the bread.

Step 12 of 13

Broil (how to broil) Broil Cook or brown food with strong heat from the top of the oven, like an upside-down grill. 1. Move an oven rack so the food will sit 3 to 6 inches from the heat.2. Turn the broiler on and give it a few minutes to heat.3. Use a metal pan (never glass that isn't broiler-safe) and put the food in.4. Stay at the oven and check every minute; things go from brown to burnt fast.5. Turn the food if the recipe says to. Done when: The top is browned and bubbly or charred in spots, usually in 1 to 5 minutes. Safety: Don't use parchment or wax paper under the broiler; it can catch fire. Use foil or a bare pan.How to broil: mistakes to avoid
until the cheese is bubbly and browned in spots, watching closely.

Step 13 of 13

Let the crocks cool a few minutes before serving. They are very hot; use oven mitts and warn your guests.

All done

Enjoy!

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Ingredients

  • Swaps for yellow onions

    Instead of onion

    • Another onion: The same amount. Yellow is the all-rounder; white is sharper and crisper; red is milder raw and adds color; sweet onions are mildest.
    • Shallots: The same amount, chopped. Milder and sweeter, with a hint of garlic.
    • Leeks: About 1½ times as much, white and light green parts. Milder and softer when cooked.

    All 4 swaps for onion

  • Swaps for unsalted butter

    Instead of butter

    • Salted butter: The same amount, with about ¼ tsp less salt per stick (½ cup) elsewhere in the recipe. Nothing noticeable once you cut the salt.
    • Plant-based butter sticks: The same amount. The closest swap.
    • Refined coconut oil: The same amount: solid when the butter is soft or cold, melted when it is melted. It is all fat, so bakes are a bit more tender and rich, with no butter flavor.

    All 4 swaps for butter

    Cooking for an allergy? Check every label.

  • Swaps for olive oil

    Instead of olive oil

    • Avocado oil or another neutral oil: The same amount. No olive flavor; avocado oil handles higher heat.
    • Butter: The same amount. Richer and nutty when browned.
    • A neutral oil + more seasoning: The same amount. Dressings lose the fruity, peppery note; a little extra lemon, garlic or mustard makes up for it.

    More for olive oil

  • Swaps for kosher salt

    Instead of salt

    • Table salt or fine sea salt: About half as much as Diamond Crystal kosher, about ¾ as much as Morton kosher. The same saltiness when measured this way.
    • Salt by weight: 1 tsp is about 6 grams of table salt, 5 grams of Morton kosher, 3 grams of Diamond Crystal kosher. The most reliable way to swap, especially in baking and brines.

    More for salt

  • Swaps for garlic

    Instead of garlic

    • Garlic powder: ⅛ tsp for each clove. Mellower and sweeter, with no bite.
    • Jarred minced garlic: ½ tsp for each clove. Milder and slightly sour from the preserving liquid.

    More for garlic

  • Swaps for all-purpose flour

    Instead of all-purpose flour

    • Gluten-free 1:1 baking flour: The same amount, a blend that includes xanthan gum. A little grittier and more crumbly, browns faster and dries out sooner.
    • Bread flour: The same amount. More gluten: chewier cookies and bread, tougher cakes.
    • Whole wheat flour: Up to half of the flour. Nuttier, darker and denser.

    All 4 swaps for all-purpose flour

    Cooking for an allergy? Check every label.

  • Swaps for dry white wine

    Instead of white wine

    • Broth + vinegar or lemon juice: The same amount of chicken or vegetable broth, plus 1 tsp white wine vinegar or lemon juice per cup. Savory and bright; a little less fruity.
    • Dry vermouth: The same amount. Herbal and a bit stronger.
    • White grape juice + vinegar: Half white grape juice and half broth, plus a splash of vinegar. Sweeter; fine in small amounts.

    All 4 swaps for white wine

    Cooking doesn't burn off all the alcohol: a dish simmered 15 minutes can keep close to half of it, and even after 2 hours some is left. Use an alcohol-free swap for anyone who avoids alcohol.

  • Swaps for beef broth

    Instead of broth

    • Vegetable broth: The same amount. Lighter and slightly sweeter.
    • Chicken broth: The same amount. Richer and more savory; not vegetarian.
    • Bouillon cube, powder or paste + water: Follow the label for the amount of liquid. Close in flavor; a little saltier.

    All 4 swaps for broth

  • Swaps for dried thyme

    Instead of thyme

    • Fresh thyme: 1 tbsp chopped fresh for each 1 tsp dried (three times as much). Brighter and more lemony.
    • Italian seasoning or dried marjoram: The same amount. Close; Italian seasoning adds oregano and basil.

    More for thyme

  • Swaps for worcestershire sauce

    Instead of Worcestershire sauce

    • Soy sauce + vinegar: 1 tbsp soy sauce + ¼ tsp vinegar + a pinch of sugar for each 1 tbsp. Savory and tangy, less complex.
    • Vegan Worcestershire: The same amount. Very close, with no anchovies.

    More for Worcestershire sauce