Asparagus Casserole

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Super creamy Asparagus Casserole with a french-fried onion topping.

 

A creamy and rich Asparagus Casserole with fresh asparagus and a crunchy fried onion topping is the perfect spring casserole and would be a great addition to your Easter menu.

In addition to fresh asparagus, this casserole has mushrooms, onion, sour cream, mayonnaise, and two kinds of cheese. How can it not be good?

Asparagus Casserole is super creamy with a french-fried onion topping.

No cream of anything soup is needed. Instead milk is added to a butter and flour roux.

Asparagus Casserole is super creamy with a french-fried onion topping.

 

The crunchy onion topping is my favorite. In addition to scattering them on top, I also like to crush some fried onions and mix them into the casserole. Not only do they provide flavor, but they act as a thickener as well.

Asparagus Casserole is super creamy with a french-fried onion topping.

As a time saver, Asparagus Casserole can be assembled a day in advance and baked just before serving.

It’s a rich and decadent spring casserole and there’s no better way to enjoy fresh asparagus.

Asparagus Casserole is super creamy with a french-fried onion topping.

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4 from 1 vote
Super creamy Asparagus Casserole with a french-fried onion topping.
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Asparagus Casserole
Prep Time
20 mins
Cook Time
30 mins
Total Time
50 mins
 

Asparagus Casserole, made with fresh asparagus, is creamy and rich with a crunchy fried onion topping.

Course: Side Dish
Servings: 8 servings
Calories: 368 kcal
Author: Christin Mahrlig
Ingredients
  • 4 tablespoons (1/2 stick) butter
  • 2 1/2 pounds asparagus, trimmed and cut into 1-inch pieces
  • 1 (8-ounce) package white mushrooms, sliced
  • 1/2 medium sweet onion, chopped
  • 1/4 cup all-purpose flour
  • 1 1/4 cup milk
  • 1/2 cup mayonnaise
  • 1/2 cup sour cream
  • 1/2 cup shredded cheddar cheese
  • 1/2 cup shredded swiss cheese
  • 1/2 teaspoon salt
  • 1/2 teaspoon lemon pepper
  • 1/4 teaspoon paprika
  • 1 (6-ounce) can french-fried onions.
Instructions
  1. Grease a casserole dish and preheat oven to 350 degrees.
  2. Melt butter in a large pan over medium heat. Add asparagus, mushrooms, and onions and cook, stirring occasionally, for about 6 minutes.
  3. Sprinkle flour over vegetables and cook, stirring continuously, for 1 to 2 minutes.
  4. Gradually stir in milk. Cook until thickened.
  5. Reduce heat to low and mix in mayonnaise, sour cream, both cheeses, salt, lemon pepper, and paprika. Remove from heat.
  6. Crush about 1/3 of the can of french-fried onions and mix them into the asparagus mixture.
  7. Transfer mixture to prepared casserole dish.
  8. Sprinkle remaining french-fried onions on top.
  9. Place in oven and bake for 30 minutes.

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Disclosure: This post contains affiliate links.

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15 thoughts on “Asparagus Casserole


  1. I just saw this great looking recipe. I would probably add some water chestnuts to give it a little more crunch. I look forward to trying it.

  2. Yes indeed a really fine recipe and great alternative to that old nasty green bean casserole
    This is delicious , creative and most of all no cream of mushroom soup
    I love we get to make our own mushroom mixture
    Way to go Christin
    Thanks ,
    Dave and family

  3. This looks delicious! Going to make for Thanksgiving! Do you think I could prep the day before (do all stovetop cooking then refrigerate overnight) and bake right before serving?

  4. Delicious….I used a bit of blue cheese instead of swiss (didn’t have it). Also added a bit of pastrami I had in fridge for a little more protein…..Wonderful!!

  5. my rule is if i eat an 8 oz. steak i have to eat a green vegetable like steamed asparagus with mayonaise, no potato or bread–no carb. i’m trying high fat low carbs like uncured bacon and eggs every day but i don’t seem to be losing my belly fat from sweets like pastries which i’ve decreased 75% or so.
    fruit is like medicine and vegetables are like torture.

  6. Asparagus is looking so good right now and I’ve been loading up ! This casserole looks awesome. Love a bit of crunch from the asparagus and onion topping against the creaminess. Yum!

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