Cheesy Squash Casserole

Cheesy Squash Casserole Recipe – squash tossed in a white cheddar cheese sauce and baked – this is like macaroni and cheese without noodles. Even squash haters will love this easy casserole! Squash, onion, butter, salt, pepper, flour, milk, white cheddar cheese, and breadcrumbs. Super simple to make and packs a ton of great flavor. Can make in advance and refrigerate until ready to bake.

scooping squash casserole from baking dish with text overlay

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White Cheddar Squash Casserole Recipe

This White Cheddar and Squash Casserole is like a macaroni and cheese casserole with squash instead of noodles. This tastes SO good! It will make squash haters change their minds! Squash, onion, butter, salt, pepper, flour, milk, white cheddar cheese, and breadcrumbs. The best part is that this casserole can be made ahead of time and baked later for entertaining. Perfect for a Memorial Day cookout, dinner party, or a hectic weeknight!

baking dish of squash casserole

How to Make Easy Squash Casserole

This casserole is super easy to make with only a few simple ingredients. In a large skillet, melt butter over medium-high heat. Add sliced squash and chopped onion. Saute until tender. Season with salt and pepper to taste. Remove vegetables from the skillet and drain any excess moisture. 

In the same skillet, add two tablespoons butter and melt. Add flour and whisk to form a paste. Slowly whisk in milk. Bring to a boil. Cook over medium heat until the sauce starts to thicken. Remove the skillet from the heat and stir in shredded white cheddar cheese. Add the squash mixture to the sauce and stir. Spoon into a baking dish. Sprinkle breadcrumbs over the top of the casserole and bake until bubbly.

Helpful Tips & Frequently Asked Questions

  • You can substitute Ritz cracker crumbs or parmesan cheese for breadcrumbs.
  • I use yellow summer squash. Feel free to substitute zucchini.
  • You can use any cheese that you enjoy. Sharp cheddar cheese is equally delicious.
  • If your skillet is not large enough, you can mix the cooked squash and cheese sauce together in a bowl.
  • For a gluten-free dish, substitute cornstarch for the flour and omit the breadcrumbs.
  • Can Squash Casserole be made in advance? Yes! Assemble the casserole and cover the baking dish with plastic wrap or aluminum foil. Refrigerate until ready to bake. You may need to add a few minutes to the baking time if baking straight out of the refrigerator.
  • Can Squash Casserole be frozen? Yes! Assemble the casserole and cool completely. Cover the baking dish with plastic wrap and aluminum foil. Freeze until ready to bake. 
    • To bake the casserole after freezing, thaw, and bake as directed.
  • Store leftovers in an airtight container in the refrigerator.
scooping squash casserole from baking dish with text overlay

What to Serve with Squash Casserole

This easy side dish has quickly become a family favorite! This goes with just about everything! Grilled chicken, pork chops, steak, and casseroles. This also makes a great holiday side dish with turkey or ham. Add this easy casserole recipe to your menu. You won’t be disappointed.

Looking for more recipes to go with this casserole? Here are a few of our favorites from the blog:

Steakhouse Filets

Steakhouse Filets – get the secret to cooking steak at home better than the restaurant! Filets seasoned with Montreal Steak…

scooping squash casserole from baking dish with text overlay

Cheesy Squash Casserole

Yield: 8 people
Prep Time 25 mins
Cook Time 20 mins
Total Time 45 mins
Cheesy Squash Casserole Recipe – squash tossed in a white cheddar cheese sauce and baked – this is like macaroni and cheese without noodles. Even squash haters will love this easy casserole! Squash, onion, butter, salt, pepper, flour, milk, white cheddar cheese, and breadcrumbs. Super simple to make and packs a ton of great flavor. Can make in advance and refrigerate until ready to bake.

Ingredients:

  • 4 Tbsp butter, divided
  • 1 medium onion, chopped
  • 3 lb yellow squash, sliced
  • 2 tsp salt, divided
  • ¾ tsp pepper
  • 2 Tbsp all-purpose flour
  • cups milk
  • 2 cups shredded white cheddar cheese
  • 2 Tbsp Italian breadcrumbs

Instructions:

  • Preheat oven to 400ºF. Lightly spray an 11×7-inch dish with cooking spray. Set aside.
  • In a large skillet over medium-high heat, melt 2 Tbsp butter. Add onion and cook for 5 minutes, or until tender. Add squash, 1½ tsp salt, and pepper. Cover and cook, stirring occasionally, 15 minutes, or until squash is tender. Drain well.
  • Melt the remaining 2 Tbsp butter in a saucepan over medium-high heat. Whisk in flour until smooth. Slowly whisk in milk. Bring to a boil; reduce heat and simmer for 2 minutes. Remove from heat and stir in cheese and remaining ½ tsp salt.
  • Gently stir together the squash mixture and cheese sauce. Pour into prepared pan. Sprinkle with breadcrumbs.
  • Bake for 20 minutes, or until bubbly. Let stand 10 minutes before serving.

Notes:

  • You can substitute Ritz cracker crumbs or parmesan cheese for breadcrumbs.
  • I use summer squash. Feel free to substitute zucchini.
  • You can use any cheese that you enjoy. Sharp cheddar cheese is equally delicious.
  • If your skillet is not large enough, you can mix the cooked squash and cheese sauce together in a bowl.
  • For a gluten-free dish, substitute cornstarch for the flour and omit the breadcrumbs.
  • Can Squash Casserole be made in advance? Yes! Assemble the casserole and cover the baking dish with plastic wrap or aluminum foil. Refrigerate until ready to bake. You may need to add a few minutes to the baking time if baking straight out of the refrigerator.
  • Can Squash Casserole be frozen? Yes! Assemble the casserole and cool completely. Cover the baking dish with plastic wrap and aluminum foil. Freeze until ready to bake. 
    • To bake the casserole after freezing, thaw, and bake as directed.
  • Store leftovers in an airtight container in the refrigerator.

Steph

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Comments

  1. So tired of the same vegetables, I decided to give this a try and serve it along side some grilled chicken. This dish makes a few dishes, but totally worth it!! So cheesy and delicious. My kids loved it too which is a huge bonus. I wasn't sure how they would feel about squash. But then again, you could cover just about anything in a cheese sauce and it'd be awesome. Love, love, LOVE this recipe!

  2. Do you think this would work mixing some squash and some zucchini? (planning for zucchini overload towards summer end!!)

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