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Green Bean Casserole with Caper–Brown Butter Mushrooms & Toasted Walnuts

Prep Time 20 mins
Cook Time 30 mins
Total Time 50 mins
Cuisine: ,
Courses:
Difficulty: Intermediate
Servings: 8
Best Season: Fall, Winter
Dietary: green beans, Vegetables, Roots + Plant Forward
Description

A modern Swedish-American twist on the beloved Thanksgiving classic, featuring a silky brown-butter mushroom sauce, briny capers, toasted walnuts, and classic French’s onion crunch.

Ingredients
    Green Beans
  • 1 ½ lbs fresh green beans, trimmed & halved
  • Salt for blanching
  • Caper–Brown Butter Mushroom Sauce
  • 4 Tbsp unsalted butter (for browning)
  • 1 small yellow onion, finely diced
  • 8 oz portabella mushrooms, finely chopped
  • 2 cloves garlic, minced
  • 2 Tbsp flour (or GF flour)
  • 1 cup vegetable or chicken broth
  • 1 cup milk or half & half
  • 1-2 Tbsp capers, rinsed & finely chopped
  • ½ tsp white pepper
  • ¼ tsp ground allspice (subtle Nordic warmth)
  • 1½ tsp Dijon mustard (optional but recommended)
  • ¼ tsp lemon juice or sherry vinegar (optional brightness)
  • ½ tsp salt (adjust to taste)
    • Crunchy Topping
  • 1 can French’s Crispy Fried Onions
  • ½ cup toasted walnuts, roughly chopped
  • chopped parsley or chives for garnish (Optional)
Instructions
    1. Prepare the Green Beans
  1. 1
    Bring a large pot of salted water to a boil.
  2. 2
    Blanch green beans 5–6 minutes, until crisp-tender.
  3. 3
    Drain and shock in an ice bath; set aside.
    4. 2. Toast the Walnuts
  4. 4
    In a dry skillet over medium heat, toast walnuts 3–4 minutes until fragrant.
  5. 5
    Set aside.
    6. 3. Make the Caper–Brown Butter Mushroom Sauce
  6. 6
    In a large skillet, melt butter and cook until deep golden brown with a nutty aroma.
  7. 7
    Add onions and mushrooms; sauté until deeply caramelized.
  8. 8
    Add garlic; cook 1 minute.
  9. 9
    Sprinkle flour over mixture; cook 1 minute.
  10. 10
    Slowly whisk in broth until smooth and thickened.
  11. 11
    Stir in milk or half & half.
  12. 12
    Add chopped capers, white pepper, allspice, and Dijon.
  13. 13
    Taste and add salt + optional ¼ tsp lemon or vinegar for brightness.
    14. 4. Assemble the Casserole
  14. 14
    Combine green beans with the caper–brown butter mushroom sauce.
  15. 15
    Transfer to a baking dish.
  16. 16
    Top with half the French’s onions.
    17. 5. Bake
  17. 17
    Bake at 375°F for 20–25 minutes.
  18. 18
    Add remaining French’s onions and toasted walnuts for the final 5 minutes until golden and crisp.
    19. 6. Finish (Swede Dish Touch)
  19. 19
    Sprinkle with:
  20. 20
    Extra toasted walnuts
  21. 21
    A tiny pinch of white pepper
  22. 22
    Parsley or chives for color
Keywords: swedish green bean casserole, caper mushroom sauce, brown butter green bean casserole, swede dish holiday recipe, thanksgiving side dish, modern green bean casserole, frenchs onion casserole, toasted walnut casserole, scandinavian thanksgiving recipe, nordic comfort food, swedish american casserole, cozy holiday sides, green bean casserole from scratch
Read it online: https://swededish.com/recipe/green-bean-casserole-with-caper-brown-butter-mushrooms-toasted-walnuts/
Abby Phillips
Foodie + Boy Mom