Old School Cheesy Squash Casserole

Old School Cheesy Squash Casserole – a must for your holiday table!! Loaded with 3 types of cheeses – cheddar, Swiss and parmesan. Seriously delicious! Squash, onion, butter, eggs, sour cream, mayonnaise, cheddar, Swiss, thyme, salt, pepper, crushed Ritz crackers, and parmesan. NO cream of anything soup! Substitute crushed pork rinds for a gluten-free/low-carb/keto-friendly dish. Can make ahead of time and refrigerate overnight. #casserole #squash #sidedish #thanksgiving #christmas

Old School Squash Casserole - a must for your holiday table!!! Loaded with 3 types of cheeses - cheddar, Swiss and parmesan. Seriously delicious! Squash, onion, butter, eggs, sour cream, mayonnaise, cheddar, swiss, thyme, salt, pepper, crushed Ritz crackers and parmesan. Can make ahead of time and refrigerate overnight. SO easy and SO delicious! Everyone LOVES this yummy side dish. #casserole #squash #sidedish #thanksgiving #christmas

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Best Squash Casserole

This Old School Cheesy Squash Casserole is a must at our holiday table. Everyone loves this easy make-ahead side dish! Not only is this casserole ridiculously good it is also ridiculously easy to make with NO cream of anything soup! It only has squash, onion, butter, eggs, sour cream, mayonnaise, cheddar, swiss, thyme, salt, pepper, crushed Ritz crackers, and parmesan.

Old School Squash Casserole - a must for your holiday table!!! Loaded with 3 types of cheeses - cheddar, Swiss and parmesan. Seriously delicious! Squash, onion, butter, eggs, sour cream, mayonnaise, cheddar, swiss, thyme, salt, pepper, crushed Ritz crackers and parmesan. Can make ahead of time and refrigerate overnight. SO easy and SO delicious! Everyone LOVES this yummy side dish. #casserole #squash #sidedish #thanksgiving #christmas

How to Make Squash Casserole

This casserole is super easy to make. Start with cooking the squash and onion in a skillet until tender. Drain the squash for 5 minutes. After you have drained the squash, mix in sour cream, eggs, cheddar cheese, swiss cheese, mayonnaise, thyme, salt, and pepper. Spread the mixture into a baking dish and top with crushed Ritz crackers, parmesan cheese, and melted butter and bake.

You can make this casserole a day in advance and refrigerate it overnight. I think make-ahead recipes are a must for the holidays! Nobody wants to spend all day in the kitchen. You want to be able to spend time with your family and relax.

Old School Squash Casserole - a must for your holiday table!!! Loaded with 3 types of cheeses - cheddar, Swiss and parmesan. Seriously delicious! Squash, onion, butter, eggs, sour cream, mayonnaise, cheddar, swiss, thyme, salt, pepper, crushed Ritz crackers and parmesan. Can make ahead of time and refrigerate overnight. SO easy and SO delicious! Everyone LOVES this yummy side dish. #casserole #squash #sidedish #thanksgiving #christmas

Tips for Making Cheesy Squash Casserole

The most important step in this recipe is to drain the onion and squash after cooking. You want to make sure as much of the liquid is removed before adding the rest of the ingredients. Squash is really watery. If you don’t let the squash really drain, it will make your casserole watery. Nobody wants to eat a watery casserole.

If you need a gluten-free/low-carb/keto-friendly dish, you can substitute crushed pork rinds for the Ritz Crackers.

For a vegetarian dish, look for an animal-free rennet Parmesan cheese such as Trader Joe’s grated parmesan cheese.

Old School Squash Casserole - a must for your holiday table!!! Loaded with 3 types of cheeses - cheddar, Swiss and parmesan. Seriously delicious! Squash, onion, butter, eggs, sour cream, mayonnaise, cheddar, swiss, thyme, salt, pepper, crushed Ritz crackers and parmesan. Can make ahead of time and refrigerate overnight. SO easy and SO delicious! Everyone LOVES this yummy side dish. #casserole #squash #sidedish #thanksgiving #christmas

What to Serve with Old School Cheesy Squash Casserole

We love this cheesy squash casserole any time of the year but especially at Easter, Thanksgiving and Christmas! It is so simple to make and tastes great!! It will make a great addition to your holiday meal. Here are a few of our favorite recipes from the blog that go great with this side dish:

scooping squash casserole from baking dish

Cheesy Squash Casserole

Yield: 8 people
Prep Time 20 mins
Cook Time 20 mins
Total Time 40 mins
Old School Cheesy Squash Casserole – a must for your holiday table!!! Loaded with 3 types of cheeses – cheddar, Swiss and parmesan. Seriously delicious! Squash, onion, butter, eggs, sour cream, mayonnaise, cheddar, swiss, thyme, salt, pepper, crushed Ritz crackers and parmesan. Can make ahead of time and refrigerate overnight. SO easy and SO delicious! Everyone LOVES this yummy side dish. #casserole #squash #sidedish #thanksgiving #christmas

Ingredients:

  • 6 Tbsp butter, divided
  • 3 lb yellow squash, sliced 1/4-inch thick
  • 1 medium onion, chopped
  • 2 tsp kosher salt divided
  • 2 eggs, lightly beaten
  • 1 (8-oz) container sour cream
  • 1 cup shredded cheddar cheese
  • ½ cup shredded Swiss cheese
  • ½ cup mayonnaise
  • ½ tsp dried thyme
  • ½ tsp black pepper
  • 2 sleeves Ritz crackers, crushed
  • 1/4 cup grated parmesan cheese

Instructions:

  • Preheat oven to 350ºF. Lightly spray a 9×13-inch baking dish with cooking spray. Set aside.
  • Melt 3 Tbsp butter in large skillet over medium-high heat. Add squash and onion and 1 tsp salt. Cook until squash is tender, about 10 minutes.
  • Transfer squash mixture to a colander and drain for 5 minutes. Discard any liquid.
  • Mix together eggs, sour cream, cheddar cheese, Swiss cheese, mayonnaise, thyme, remaining 1 tsp salt and pepper. Add cooked squash mixture.
  • Pour squash mixture into prepared pan.
  • Melt remaining 3 Tbsp butter. Combine crushed Ritz crackers, melted butter and parmesan cheese. Sprinkle over casserole.
  • Bake uncovered for 20 minutes.

Notes:

Can assemble casserole in advance and refrigerate overnight.
Substitute crushed pork rinds for a gluten-free/low-carb/keto-friendly dish.

Steph

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Old School Squash Casserole - a must for your holiday table!!! Loaded with 3 types of cheeses - cheddar, Swiss and parmesan. Seriously delicious! Squash, onion, butter, eggs, sour cream, mayonnaise, cheddar, swiss, thyme, salt, pepper, crushed Ritz crackers and parmesan. Can make ahead of time and refrigerate overnight. SO easy and SO delicious! Everyone LOVES this yummy side dish. #casserole #squash #sidedish #thanksgiving #christmas
spoonful of squash casserole

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