Creamy butter beans are simmered with deeply caramelized onions, garlic, thyme, dry sherry, and a rich savory broth, then finished with Parmigiano-Reggiano and Gruyère. The result has the comforting flavor of French onion soup in a hearty skillet dish, with crusty bread for scooping up the creamy onion broth.

Prep Time: 15 minutes
Cook Time: 50–55 minutes
Total Time: About 1 hour 10 minutes
Servings: 4 as a main dish or 6 as a side
Difficulty: Easy
Cost: Economical

Ingredients

French Onion Butter Beans

• 2 tablespoons extra-virgin olive oil
• 2 tablespoons unsalted butter
• 3 large yellow onions, halved and thinly sliced
• 3/4 teaspoon kosher salt, plus more to taste
• 1/4 teaspoon freshly ground black pepper
• 3 cloves garlic, minced
• 1 teaspoon fresh thyme leaves, or 1/2 teaspoon dried thyme
• 1 tablespoon dry sherry
• 1 tablespoon balsamic vinegar
• 1 teaspoon Worcestershire sauce
• 1 1/2 cups low-sodium vegetable broth
• 2 (15-ounce) cans butter beans, drained and rinsed
• 1/2 cup freshly grated Parmigiano-Reggiano
• 1/2 cup freshly grated Gruyère cheese

For Serving

• Garlic Bread⁠, toasted

Instructions

Caramelize the Onions

1. Heat the olive oil and butter in a large 12-inch skillet over medium heat.
2. Add the onions and kosher salt. Cook for 10 minutes, stirring frequently, until the onions begin to soften.
3. Reduce the heat to medium-low and continue cooking for 25–30 minutes, stirring every few minutes, until the onions are deeply golden and significantly reduced.
4. If the skillet begins to develop excessive browned bits before the onions are ready, add 1–2 tablespoons water and scrape the bottom clean.

Build the Sauce

5. Add the garlic and thyme and cook for about 30 seconds, stirring constantly.
6. Add the dry sherry and balsamic vinegar. Scrape up any browned bits from the bottom of the skillet and cook for 1–2 minutes, until the liquid is mostly reduced.
7. Stir in the Worcestershire sauce and vegetable broth.
8. Add the butter beans and bring to a gentle simmer.
9. Simmer uncovered for 8–10 minutes, until the broth reduces and the flavors meld.
10. Mash about 1/2 cup of the beans directly in the skillet and stir them back into the sauce to create a naturally creamier texture.

Finish the Beans

11. Remove the skillet from the heat and let it stand for 1 minute.
12. Stir in the Parmigiano-Reggiano and Gruyère gradually until melted and smooth.
13. Taste and adjust with additional kosher salt or black pepper as needed.
14. Serve hot with toasted Garlic Bread for dipping.

Cook’s Notes

Onion Caramelization: Do not rush this step. The deeper the onions caramelize, the more convincing the French onion flavor will be.

No Added Sugar: Properly caramelized onions provide enough sweetness. Added sugar is unnecessary here.

Dry Sherry: A small amount adds the same savory complexity associated with classic French onion soup without making the dish taste alcoholic.

Balsamic Vinegar: Use it sparingly. It should deepen the onions, not make the dish noticeably tangy.

Worcestershire Sauce: This adds savory depth. If keeping the dish strictly vegetarian, use a vegetarian Worcestershire sauce.

Butter Beans: Mashing a small portion creates body without flour or cream.

Cheese: Add the cheese off the heat after the bubbling has stopped. This helps prevent stringiness or separation.

Broth: Start with 1 1/2 cups rather than 2 cups. The finished dish should be creamy and spoonable, not soupy.

Storage: Refrigerate leftovers in an airtight container for up to 4 days. Reheat gently with a splash of vegetable broth if needed.

Serving Suggestions

Garlic Bread⁠: The best existing match in the collection for soaking up the onion-rich sauce. 

Simple Green Salad: A bright vinaigrette provides useful acidity against the sweet onions and melted cheese.

Roasted Chicken or Pork: Serve a smaller portion of the beans as a rich side dish.

Main Dish: Serve in shallow bowls with toasted baguette or sourdough for a complete vegetarian meal.

Beverage Suggestions

Sauvignon Blanc: Bright acidity balances the caramelized onions and cheese.

Unoaked Chardonnay: Has enough body for the Gruyère without becoming heavy.

Dry Hard Cider: Particularly good with the sweet-savory onion flavor.

Nonalcoholic: Sparkling water with lemon keeps the pairing clean and refreshing.