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French onion butter beans in a skillet with a silver spoon and bright daylight.

French Onion Butter Beans (Easy 30-Minute Skillet)

Prep Time: 10 minutes
Cook Time: 35 minutes
Total Time: 45 minutes
Servings: 4 people
Author: Nico Pallotta

  • 3 tablespoons extra virgin olive oil
  • 3 large yellow onions cut in half and thinly sliced (about 21 oz /600 g)
  • ¾ teaspoon salt add more to taste
  • ¼ teaspoon black pepper
  • 2 teaspoons sugar
  • ½ cup (120 ml) water
  • 2 tablespoons balsamic vinegar or apple cider vinegar
  • 3 cloves garlic grated or pressed
  • 2 cups (500 ml) vegetable broth low-sodium
  • 2 cans butter beans 15 oz / 400 g each can or 3 cups / 460 g cooked beans – drained and rinsed
  • 1 teaspoon dried thyme
  • ½ cup (50 g) grated parmesan
  • 1 baguette or slices of crusty bread for serving

  • Caramelize the onions: Peel, halve, and thinly slice 3 large yellow onions. Heat 3 tablespoons extra virgin olive oil oil in a large 12-inch (30 cm) skillet over medium heat. Add the onions, ¾ teaspoon salt, ¼ teaspoon black pepper, and 2 teaspoons sugar, and cook for 5 minutes, stirring often.
    Pour in ½ cup water, reduce the heat to medium-low, and cook for about 20 minutes, stirring occasionally, until the water has evaporated and the onions are soft and golden.
    Turn the heat to high, stir in 2 tablespoons balsamic vinegar, and cook for 2 minutes.
    Step 1 Sliced onions caramelizing in olive oil until soft and golden.
  • Add the beans: Stir in 3 cloves garlic (grated) and cook for 30 seconds.
    Add 2 cups vegetable broth, 2 cans butter beans, and 1 teaspoon dried thyme. Bring to a gentle simmer and cook uncovered for 10 minutes. For a creamier broth, mash a few of the beans with the back of a spoon.
    Step 2 Butter beans simmering with broth, garlic, thyme, and caramelized onions.
  • Finish: Turn off the heat and let the skillet sit for 1 minute, until it stops bubbling. Stir in ½ cup grated parmesan until the broth looks creamy. Taste and add more salt and pepper if needed.
    Step 3 Grated Parmesan melting into creamy French onion butter beans.
  • Serve: Serve hot with toasted baguette, sourdough, or other crusty bread for dipping into the rich onion broth.
    Step 4 French onion butter beans served with toasted sourdough on white marble.
Substitutions
  • Yellow onions → White onions or sweet onions.
  • Extra virgin olive oil → Avocado oil.
  • Sugar → Brown sugar or maple syrup. You can skip it if you prefer; the onions may just take a little longer to brown.
  • Balsamic vinegar → Apple cider vinegar or red wine vinegar.
  • Garlic → Omit it or use garlic-infused olive oil.
  • Butter beans → Cannellini beans or Great Northern beans.
  • Dried thyme → Herbes de Provence or dried oregano.
  • Parmesan → Pecorino Romano or a vegetarian hard cheese.
  • Crusty bread → Baguette, sourdough, or country loaf.
 
Tips
  • Trust the process: Salt, sugar, water, and vinegar caramelize the onions in about 30 minutes.
  • Use a large skillet: A 12-inch (30 cm) skillet helps the onions caramelize instead of steam.
  • Choose low-sodium broth: Parmesan adds salt, so you can season to taste at the end.
  • Mash a few beans: It naturally thickens the broth without flour or cream.
  • Wait before adding Parmesan: Let the bubbling stop so the cheese blends in smoothly.
  • Grate your own Parmesan: It melts much better than pre-grated cheese.
  • Toast the bread: Crisp bread is best for soaking up the rich onion broth.
  • Store leftovers: Refrigerate for up to 4 days and reheat gently. Toast fresh bread just before serving.
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