Cheesy Ritz Squash Casserole

This easy Cheesy Ritz Squash Casserole will make a squash lover out of anybody! Tender squash and sweet onion are tucked into a creamy cheddar filling, all topped with a golden, buttery Ritz cracker crust. Just 20 minutes of prep is all you need, and then the oven does the rest. This comfort food will be a hit with the whole table, and it’s perfect with some Southern fried chicken!

A spoon taking a scoop out of squash casserole.

A Quick Look At The Recipe

  • Recipe Name: How to Make Squash Casserole
  • Serves: 8
  • Main Ingredients: yellow squash, sliced, onion, Ritz crackers, shredded cheddar cheese, eggs, beaten, milk, melted butter, salt
  • Why You'll Love It: This squash casserole recipe includes gooey cheese, buttery cracker crumbs adding a hint of crunch, and the taste of garden-fresh squash.

Gooey, Crunchy, and Delicious

I’ll admit, I’m a recent convert to squash. But in my defense, I never actually tried it until a few years ago. I don’t know what exactly held me off, but I do know that when I finally did taste it, I was won over on the first bite. Now I love making dishes like this Stove-Top Zucchini and Squash, Vegan Butternut Squash Soup, and this Summer Squash Pasta.

Squash casserole is one of those dishes that varies so widely… I swear there are at least a hundred different variations out there! But this one is my favorite: gooey cheese, buttery cracker crumbs for a hint of crunch, and the taste of garden-fresh squash (even though I use frozen squash most of the time!). Fortunately, this is a cinch to make and very filling for a side dish.

The children might need a little convincing, but if they had any decent judgment in things, they wouldn’t need parents now, would they? Just don’t mention the squash, and I’m sure they will clean their plates!

Ingredients for squash casserole, featuring squash, onion, butter, Ritz crackers, cheddar cheese, salt, pepper, milk, and eggs.

Ingredients

  • Squash (either yellow or zucchini)
  • Onion
  • Butter
  • Ritz crackers (or generic)
  • Cheddar cheese (or your favorite cheese!)
  • Salt & pepper
  • Milk
  • Eggs

Tips for a Delicious Squash Casserole

  • If you want to add even more vegetables to your casserole, sauté some diced red bell pepper with the other veggies in the skillet. It goes great with the squash!
  • For even more flavor, add some fresh herbs to your casserole. Chop them and add them to the skillet with the butter. I sometimes like to use parsley, thyme, oregano, basil, or chives.
  • After draining the squash, squeeze out any excess moisture. Too much liquid will make your casserole soggy!
  • Let the casserole sit for about 5 minutes after pulling it out of the oven. It helps everything set up nicely before you start scooping it out.

How to Make a Squash Casserole

1. Preheat the Oven

Preheat your oven to 350°F, then grease your casserole dish with a little butter or cooking spray.

2. Cook the Squash & Onions

Now pour about a cup and a half of water into a large skillet.

Pouring water into a skillet.

Then add your diced onion and squash. Cook over medium heat for about 5 to 10 minutes until they’re nice and tender.

When done, drain the water from the skillet and add your butter, letting it melt.

Butter sliced over squash in skillet.

3. Make the Ritz Topping

Now in a medium bowl, crush your crackers and stir in the shredded cheese. Then mix in the salt and pepper.

Once it’s all mixed together, fold half of the cracker mixture into the squash. Set the remaining half aside – you’re gonna save the rest to sprinkle on top of your casserole.

Cracker and shredded cheese piled on sliced squash in a skillet.

4. Add Milk & Eggs

In a small bowl, whisk together your milk and eggs until well combined.

Beating together milk and eggs in separate measuring cup.

Then go ahead and pour that mixture right into the skillet with your squash, giving it a good stir until everything comes together.

5. Assemble & Bake

Transfer your filling to a casserole dish, sprinkle the remaining cracker mixture right on top, and dot it with a little butter.

Bake at 350°F for 25-30 minutes, or until the top is golden brown.

6. Serve & Enjoy!

Let your casserole sit for at least 5 minutes, then dig in!! Enjoy this delicious squash casserole recipe.

Squash casserole out of the oven.

Storage

Store casserole leftovers in an airtight container in the fridge for up to 4 days. However, it can get soggy over time, so it’s best to eat ASAP. Reheat in the microwave, oven, or air fryer. Alternatively, store leftovers in the freezer for up to 3 months. However, once again, the casserole might be soggy once thawed.

Bowl of squash casserole

Cheesy Ritz Squash Casserole FAQs

Should I use fresh squash or frozen squash in my casserole?

I use fresh squash when it is given to me, but if I am buying it, I just get frozen squash, as I’ve found the quality and size of fresh squash at the grocery store vary widely. It is rare to find any decent-sized squash that is still somewhat firm, and when you do, they are priced out the wazoo for the quantity you need.

When you buy frozen squash, you get nice thick slices and a quality that has never been less than excellent from what I’ve seen. To yield the same amount of nice, thickly sliced squash from the produce section, I’d pay twice as much and likely end up with overripe squash anyway. Perhaps it is different where you are, but that is how it is in ‘Bama.

What can I use other than Ritz crackers?

If you don’t have access to Ritz crackers, any knockoff brand works just as well, or you can swap them out for corn flakes, panko bread crumbs, or crumbled croutons.

Can I make my cheesy squash casserole ahead of time?

Yes, you can assemble the casserole in advance and then cover and refrigerate it for up to 24 hours. When it’s time to bake, let the dish come to room temperature for at least 30 minutes before it goes into the oven. You can also cook the casserole and then reheat leftovers as well.

What do you serve with yellow squash casserole?

This casserole is the perfect side dish to accompany all kinds of main meals, like my Crock Pot Turkey Breast, Butter Roasted Chicken, Baked Ham, Fried Chicken, Fried Catfish, and Pan-Seared Pork Chops. It’s also delicious served with other side dishes, such as creamy mashed potatoes and old-fashioned macaroni salad.

Did this recipe make a squash lover out of you? Leave a star rating and tell me all about it in the comments below.
scoop of squash casserole
Southern Plate Recipe

How to Make Squash Casserole

5 from 2 votes
This squash casserole recipe includes gooey cheese, buttery cracker crumbs adding a hint of crunch, and the taste of garden-fresh squash.
Prep Time 20 minutes
Cook Time 30 minutes
Total Time 50 minutes
Servings 8

Ingredients 

  • 4 cups yellow squash sliced
  • ½ cup onion
  • 35 Ritz crackers (a sleeve of buttery round Ritz crackers)
  • 1 cup shredded cheddar cheese
  • 2 eggs, beaten
  • ¾ cup milk
  • ¼ cup melted butter
  • 1 teaspoon salt
  • Ground black pepper to taste
  • 2 tablespoons butter

Instructions

  • Preheat the oven to 350°F and grease a casserole dish.
    4 cups yellow squash
  • Put the squash, onion, and about 1 ½ cups of water in a large skillet over medium heat. Cook until the squash and onions are tender (about 5-10 minutes). Drain well. Add a half stick of margarine and let it melt.
    ½ cup onion, ¼ cup melted butter
  • In a medium bowl, crush the crackers and stir in the shredded cheese. Add salt and pepper, and stir. Then stir half of the cracker mixture into the squash.
    35 Ritz crackers, 1 cup shredded cheddar cheese, 1 teaspoon salt, Ground black pepper to taste
  • In a small bowl, mix together the milk and two eggs. Pour into the squash mixture and stir well. Pour into a casserole dish.
    2 eggs, beaten, ¾ cup milk
  • Top with the remaining cracker topping and dot with the remaining butter. Bake for 25-30 minutes, or until the top is golden brown.
    2 tablespoons butter

Notes

Store casserole leftovers in an airtight container in the fridge for up to 4 days. Keep in mind that it can get soggy over time, so it’s best to eat ASAP. Reheat in the microwave, oven, or air fryer. You can also store leftovers in the freezer for up to 3 months, but again, the casserole might be soggy once thawed.
Course: Appetizer
Cuisine: American
Keyword: casserole, squash

Nutrition

Calories: 171kcal | Carbohydrates: 13g | Protein: 8g | Fat: 10g | Saturated Fat: 5g | Cholesterol: 59mg | Sodium: 533mg | Potassium: 253mg | Fiber: 1g | Sugar: 5g
Tried this recipe?Mention @southernplate or tag #southernplate!

79 Comments

  1. my mom makes one every year similar to this one. only she uses sour cream and one egg instead of two, and cheese-itz instead of ritz crackers. i recently wanted to make it and cant seem to find the exact receipe but this one is pretty close. also she puts green onions in the sour cream mixture.
    and since i made it last year i have several people at my office who hate squash, beg me to make it again. =]

  2. I enjoy your blog so much and have learned quite a few things. I have fixed this squash casserole twice in the last week. One for church and one for family. Everyone loves it and it was all eaten up. Which sure lets me know it’s a hit. Thanks for sharing and caring. Blessings, Karen

  3. I was freaking out because i have a whole bunch of squash and didnt know what to do with them and i have never made squash casserole…shoot i barely know how to cook…then i found this recipe….it is cooking now,smells great and it was easy. Thanks so much for posting this 🙂

  4. I am trying this recipe for the first time. I have never done a squash casserole, but I love it. My gramma use to make all of this yummy country cooking and she recently passed away and now I am attempting to figure out some of her recipes that I didn’t get from her. I figured out her Chicken broccoli casserole (It is divine) and her fried peach pies and some others, but I hadn’t attempted to figure out the squash casserole yet, these ingredients sound very similar to grammas so we shall see. Its in the over now, I’ve got pork chops to get started and some mashed potatoes so let’s hope the squash is a hit with the rest! Thanks so much for this recipe, I can smell it bubbling in the oven and it smells like grammas kitchen! Many thanks and God Bless~Erin

  5. The first time I made this recipe, which was on July 19th, my Italian husband comes home from work while it was in the oven and asked “What stinks?” I told him it was his dinner!! Well, he actually tried it and loved it! We just got back from his surprise 50th birthday party that his niece graciously offered to have at her house, I made it again, and all of his relatives loved it, too! That’s why I’m back here again, I’m making copies for 3 of his nieces and his sister-in-law. Thanks Christy! It’s a keeper!

    Veronica

  6. I will try this recipe. I am go glad I found this website. I tried the crockpot chickn/dressing this weekend. It was so good. I think I may have used too much chicken stock, would have liked it a little drier. Will use less next time but it was so good. Thanks for the Southern recipes and tips that you give and the pics. Barbara

  7. These comments reminded me, I once had a recipe for a squash,coconut pie. I’m sure it had eggs and sugar in it too. You made the filling and poured it into a pie shell and baked it. Does anyone know the recipe. It’s one of those you don’t write down because it’s unusual and you know you’ll never forget it ! Well, I forgot it !!

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