Roasted Green Beans with Onions and Walnuts

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Oven Roasted Green Beans! Drizzled and cooked with balsamic vinegar, honey, thyme, and garlic.

Photography Credit: Elise Bauer

Have you ever tried roasting fresh green beans in the oven? It works! The trick to keep them from drying out in the oven is to toss them well with extra virgin olive oil.

This is a recipe from Cooks Illustrated that we found years ago. In this recipe we are roasting green beans with onion wedges in a hot 450°F oven. About half way through the roasting, we coat the green beans with a balsamic vinegar honey thyme dressing. The natural sugar in the dressing helps the green beans and onions caramelize. So good!

We then toss the green beans with chopped toasted walnuts to serve.

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Roasted Green Beans with Onions and Walnuts Recipe

  • Prep time: 5 minutes
  • Cook time: 25 minutes
  • Yield: Serves 4


  • 1 lb green beans, stem ends snapped off
  • 1/2 medium yellow or red onion, cut into 1/2 inch thick wedges
  • 1 Tbsp extra virgin olive oil
  • Salt and pepper
  • 1 Tbsp balsamic vinegar
  • 1 teaspoon honey
  • 1 teaspoon minced fresh thyme
  • 2 medium thin-sliced garlic cloves
  • 1/3 cup toasted chopped walnuts


1 Preheat oven, prepare sheet pan: Place rack in middle position, preheat oven to 450°F. Line a sheet pan with aluminum foil or Silpat.

2 Toss beans and onions with olive oil and salt, roast 10 minutes: Spread the beans and onions on the baking sheet. Drizzle the beans with olive oil and use your hands to coat the beans evenly.

Sprinkle the beans with 1/2 teaspoon of salt, toss to coat, and distribute in an even layer.

Roast at 450°F for 10 minutes.

3 Make balsamic honey garlic mixture: While roasting the beans, combine the balsamic vinegar, honey, thyme, and garlic slices in a small bowl.

4 Brush beans with balsamic honey mixture, return to oven: After the beans and onions have roasted for 10 minutes, remove from oven. Drizzle the balsamic honey mixture over the beans and onions; use tongs to coat evenly.

Put back in the oven and continue to roast until onions and beans are dark golden brown in spots and beans have started to shrivel, about 12-15 minutes longer.

5 Season to taste with salt and pepper.

Transfer to serving dish, sprinkle with toasted chopped walnuts, and serve.

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Adapted from recipe in Cook's Illustrated.

Roasted Green Beans with Onions and Walnuts

Elise Bauer

Elise Bauer is the founder of Simply Recipes. Elise launched Simply Recipes in 2003 as a way to keep track of her family's recipes, and along the way grew it into one of the most popular cooking websites in the world. Elise is dedicated to helping home cooks be successful in the kitchen. Elise is a graduate of Stanford University, and lives in Sacramento, California.

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6 Comments / Reviews

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Did you make it? Rate it!

  1. Sonya

    I guess I should clarify that I have made the original recipe from Cook’s Illustrated as I have that issue. Just seconding that this recipe is FANTASTIC! I’ve made it twice and it just blows me away how delicious they are. That roasting is magic! I love Cook’s Illustrated :) I also love your website – your red velvet cupcakes, which my sister showed me many years ago, are my husband’s all time favorite red velvet recipe!


  2. Jena

    Made this with pork chops and potatoes. Yummy. But I was doing it from memory and added the walnuts to the honey mixture before the second go in the oven. I also only did it at 400 and for about half the time. Will follow directions better next time.

  3. Amanda

    Oh my goodness! We tried this recipe with marinated steaks and mashed potatoes tonight and it was absolutely fabulous! The carmelized onions were out of this world! In fact, I might double the onions next time just so there is more to enjoy! I give this one 5 STARS!


  4. Alayna

    I made this for my mom and I for dinner last night as a side dish to some scallops. It was absolutely delicious and made the entire downstairs smell wonderful! The walnuts made it one hundred times better. This recipe is definitely a keeper and was very easy to make – the sauce combination of vinegar, honey, and garlic was very distinct and tasty.


  5. Elise Bauer

    Hi Kathy – It’s definitely a different way to do beans. They are chewier, and loaded with flavor. Toasted walnuts make a big difference.

    Hi Sara – Let us know how they turn out!

    Hi Beth – I don’t see problem with using frozen green beans, as long as you have defrosted them. Green beans from a can, however, no dice.

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Roasted Green Beans with Onions and WalnutsRoasted Green Beans with Onions and Walnuts