Easy Asparagus Casserole With Mushrooms

Easy Asparagus Casserole With Mushrooms
Diana Rattray
Prep: 15 mins
Cook: 25 mins
Total: 40 mins
Servings: 6 servings
Nutrition Facts (per serving)
377 Calories
17g Fat
54g Carbs
8g Protein
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Nutrition Facts
Servings: 6
Amount per serving
Calories 377
% Daily Value*
Total Fat 17g 21%
Saturated Fat 9g 46%
Cholesterol 39mg 13%
Sodium 435mg 19%
Total Carbohydrate 54g 20%
Dietary Fiber 5g 18%
Protein 8g
Calcium 177mg 14%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
(Nutrition information is calculated using an ingredient database and should be considered an estimate.)

This easy asparagus casserole is made with a simple white sauce and sauteed mushrooms. The casserole is topped with buttered bread crumbs, but you could use crushed potato chips or crumbled French fried onions.

For more crunch and interest, add some toasted slivered almonds to the topping.


  • 2 to 2 1/2 pounds asparagus spears (trimmed and cut in 1 1/2-inch pieces)
  • 1 cup sliced mushrooms
  • 6 tablespoons butter (divided)
  • 5 tablespoons all-purpose flour
  • Kosher salt and freshly ground black pepper, to taste
  • 2 cups milk
  • 1 teaspoon Worcestershire sauce
  • 1/2 to 1 cup buttered breadcrumbs 

Steps to Make It

  1. Gather the ingredients.

  2. Preheat the oven to 375 F/190 C/Gas 5. Lightly butter a 1 1/2- to 2-quart baking dish.

  3. Cook asparagus in boiling salted water just until tender; drain well and place in the prepared baking dish. If using frozen asparagus, cook following the package directions.

  4. In a large saucepan over medium-low heat, saute the sliced mushrooms in 4 tablespoons of butter. Blend in flour and continue cooking, stirring, for 2 minutes. Gradually add the milk, stirring constantly. Add Worcestershire sauce. Continue to cook, stirring constantly, until thickened. Taste and add kosher salt and freshly ground black pepper, as needed.

  5. Pour the sauce over the asparagus. 

  6. Melt the remaining 2 tablespoons of butter and toss with the bread crumbs until well blended.

  7. Top the casserole with the buttered bread crumbs. Bake in the preheated oven for 20 to 25 minutes.

  8. Serve and enjoy!

Recipe Variations

  • With Cheddar Cheese: Add 1 cup of shredded cheddar cheese to the thickened sauce; stir until melted. Proceed with the recipe.
  • With Parmesan Cheese: Toss 1/4 cup of fresh grated Parmesan cheese with the bread crumbs. Sprinkle over the casserole and bake as directed.
  • Add about 1/4 cup of toasted pecans or slivered almonds to the breadcrumb topping.
  • Omit the breadcrumbs and 2 tablespoons of butter and top the casserole with crushed potato chips or French fried onions.