Go Back
white plate of asparagus casserole with a silver fork.

Easy Asparagus Casserole

Lindsay
Easy, cheesy asparagus casserole comes together in just a few steps and is the perfect make-ahead side dish. Seriously the best!
4.89 from 195 ratings
Prep Time 15 minutes
Cook Time 45 minutes
Course Side Dish
Cuisine American

Ingredients
  

  • 2 pounds asparagus trimmed and cut into 2-inch pieces
  • ½ cup mayonnaise
  • 6 ounces sharp cheddar cheese grated
  • ½ onion diced
  • 2 tablespoons flour
  • 2 cloves garlic minced
  • 1 cup milk
  • salt and pepper
  • 15 Ritz crackers or similar crushed

Instructions
 

  • Place the asparagus, mayo, and cheese together in a large bowl.
  • In a skillet over medium heat, add the onion with a drizzle of oil. Saute the onion for about 5 minutes until soft and slightly browned. Sprinkle the garlic and flour all over the onion mixture. Stir to create a roux and let the flour cook for a minute or two.
  • Very slowly pour the milk into the skillet, stirring as you go to incorporate the milk into the flour mixture. Let the milk sauce come to a bubble. Sprinkle with salt and pepper.
  • When the milk sauce is slightly thick, pour it into the bowl with the asparagus and other ingredients. Stir to mix everything together, and pour the mixture into a baking dish, 9x13 or similar. Sprinkle the crushed crackers over the casserole.
  • Bake the asparagus casserole at 375F for 40-50 minutes or until the asparagus is just tender and the cheese is bubbly. Broil the top for one minute if you'd like to brown the crackers.
  • Serve. Eat. Enjoy!

Notes

  • Asparagus: This works beautifully with fresh asparagus, but canned/drained asparagus or thawed frozen asparagus are also delicious in this casserole.
  • Make this in advance up to the baking step, it will keep in the fridge for 3 days or so. Then bake right before eating.
  • To make this gluten free, skip the flour and instead whisk 2 teaspoons cornstarch into the milk mixture BEFORE streaming it into the onion skillet. Stream in the milk/cornstarch mixture, and proceed with the rest of the recipe. Swap the crackers for a gluten free cracker or crushed chip of your choice.
 
Tried this recipe?Let me know how it was!