Emily Lopez 11/16/2025

Introduction

This easy and tasty dish is a great mix of green beans, creamy mushroom sauce, and crunchy fried onions. It’s perfect for family dinners, holidays, or any time you want to enjoy a comforting meal with loved ones.

 

The goal of these instructions is to help you make Emily's Cheesy Green Bean Casserole with Walnuts step by step. You’ll learn how to gather the ingredients, prepare them, and cook the casserole so that it comes out delicious every time. Plus, it’s a great way to add some veggies to your meals! 

 

Before you start, it’s good to have some basic cooking skills, like chopping vegetables, measuring ingredients, and using a stovetop and oven. Knowing how to work with common kitchen tools like mixing bowls and baking dishes will make things easier.

 

There are a few important things to keep in mind. Be careful when using sharp knives and handling hot dishes. Make sure your ingredients are fresh to avoid any kitchen mishaps. If someone has food allergies or special diet needs, adjust the recipe to keep everyone safe.

 

This instructions will give you everything you need to know to make this delicious casserole, including a list of ingredients, simple cooking steps, and tips for serving it. With this guide, you’ll be ready to make Emily's Green Bean Casserole with Walnuts, a favorite dish for your family and friends. Happy cooking!

1. Gather all Ingredients and Tools Needed for the Recipe

The first step in making the casserole is to gather all the necessary ingredients. This will ensure you have everything you need before you start cooking.

Ingredients

(Image 2) 

  • 1 1/2 tablespoons butter 
  • 1 1/2 tablespoons olive oil 
  • 12 oz. sliced baby portabella mushrooms 
  • 24 oz. green beans 
  • 11 oz. portabella mushroom soup
  • 1/2 cup water 
  • 1/2 cup swiss cheese, shredded 
  • 1/2 cup gruyere cheese, shredded 
  • 1/4 cup  walnuts 
  • 4 oz. fried onion pieces 

Tools Needed

(Image 2)

  • Measuring cups
  • Cutting board
  • Mixing spoon
  • Spatula
  • Knife
  • Baking dish
  • Large skillet 

                                                  Image 1                                                                                                        Image 2 

2. Preheat the Oven 

  • Preheat oven to 375°F. 

3. Prepare the Casserole

  • Heat olive oil and butter in skillet on medium heat 
  • Add walnuts and toast for 2 minutes 
  • Add mushrooms and sauté until they become soft and lightly browned (Image 3)
  • Add green beans and sauté until heated through (Image 4)
  • Add soup and water to skillet, mix and heat through (Image 5)
  • Add mixture to a medium size casserole dish (Image 6)
  • Top with cheese and fried onion pieces (Image 7)

Image 3

Image 5

Image 4

Image 6 

Image 7

7. Bake the Casserole 

  • Place the baking dish in the preheated oven and bake for 20 minutes or until the topping is golden brown and the casserole is bubbly.

8. Serve the Dish

  •  Remove the casserole from the oven, let it cool slightly, and serve warm. Enjoy the dish!

 

9. Additional Information 

  • Safety Information:
    • Use oven mitts when handling hot dishes and to be careful with sharp utensils during preparation.
  • Suggestions for Sides:
    • Consider serving the casserole as a side dish or with a salad to complete the meal

  •  Customization Ideas:

    • Add Cooked Bacon: For a smoky flavor, mix in 1 cup of cooked and crumbled bacon into the ingredients

    • Different Cheeses: Experiment with different types of cheese such as pepper jack or gouda for a unique flavor