---
title: "French Onion & Kale Soup with Gruyère Croutons"
servings: 4
source:
  name: HelloFresh
  url: https://www.hellofresh.com/recipes/french-onion-kale-soup-with-gruyere-croutons-5654b7d479a52af8b4567
prep time: 15 minutes
cook time: 45 minutes
time required: 60 minutes
difficulty: medium
allergens:
  - Soy
  - Wheat
  - Milk
tags:
  - Veggie
rating: 3.5
rating_count: 467
source_chef: Recipe Development Team
nutrition:
  calories: 515
  protein: 24
  fat: 25
  saturated fat: 16
  carbohydrates: 52
  sugar: 9
  fiber: 6
  sodium: 1358
image: "https://images.recipes.furrysalamander.com/Soup%20Recipes/Veggie/french-onion-kale-soup-with-gruyere-croutons.avif"
---

Wash and dry all produce. Halve, peel, and thinly slice the @Yellow Onion{4%unit}. Drain and rinse the @Tuscan Kale{8%ounce}.

In a #large pot{}, heat @Butter{2%tablespoon} over medium heat. Add the @Yellow Onion{} and cook, stirring, until beginning to soften, ~{8-10%minutes}. Sprinkle with @Sugar{1%teaspoon} and cook, stirring occasionally, until deep golden brown and fully caramelized, ~{20-25%minutes}. TIP: If the bottom of the pot begins to scorch, add a splash of water and scrape up the brown bits with a wooden spoon.

Preheat the broiler to 500°F. While the onion caramelizes, cut @Demi-Baguette{2%unit} on a sharp angle. Cut @Garlic{1%clove} in half, then mince the remaining. Remove the leaves from @Thyme{½%ounce} and chop them. Destem and finely slice the @Tuscan Kale{}.

Once the onion is fully caramelized, stir the garlic and thyme into the pot and cook until fragrant, ~{30%seconds}. Stir in 1 1/2 cups stock, @Veggie Stock Concentrate{4%unit}, and @Soy Sauce{6%teaspoon}. Bring to a boil, then reduce to a simmer for ~{5-7%minutes}. Stir the kale into the soup to wilt. Season generously with salt and pepper.

Meanwhile, place the @Daguette slices{} on a #baking sheet{} and toast in the oven until golden, ~{1-2%minutes}. Remove from oven and rub with the halved @Garlic{}. Sprinkle the @Gruyère Cheese{8%ounce} over the toasts. Return to the broiler until melted and bubbling, ~{1-2%minutes}.

To serve, ladle the soup into bowls and top with the remaining gruyère croutons. Serve extra gruyère croutons on the side for dipping.