Fresh Summer Squash Casserole

A serving of yellow squash casserole with a crumb topping on a white plate, with more casserole and round crackers in the background.

This summer squash casserole is creamy, comforting, and easy to bring together with simple ingredients. Tender yellow squash bakes into a rich filling topped with just the right amount of crunch, making it a reliable side for family meals or potlucks.

Course Main Course, Main Dishes, Side Dish, Sides

Cuisine American, International

Keyword casserole, casserole dish, cheddar, cracker, onion, ritz, ritz crackers, side dish, sour cream, squash casserole, squash casserole recipe, squash mixture, summer squash, topping, yellow squash, zucchini

Prep Time 10

Cook Time 30

Servings Servings

Calories 587kcal

Author Zuzana Paar

Equipment

Ingredients

1 Tablespoon Butter
½ Cup Sweet Onion chopped
2 Pounds Yellow Squash about 5 medium, sliced into ⅓-inch pieces
10.5 Ounce Cream of Mushroom Soup
4 Ounce Cream Cheese softened
1 Egg
8 Ounce Sharp Cheddar shredded, divided
½ teaspoon Salt
½ teaspoon Black Pepper cracked
25 Pieces Crackers crushed
4 Tablespoons Butter melted

US Customary - Metric

Instructions

Preheat the oven to 375°Fahrenheit (190°Celsius), grease a casserole dish, and prep the onion, cheese, and crushed crackers.
Slice the yellow squash into thick rounds and place them in a large bowl so they’re ready to mix.
Sauté the onion in butter until soft and golden, then stir in the cream cheese until smooth and creamy.
Combine the squash with the onion mixture, cream of mushroom soup, egg, half the cheese, salt, and pepper until evenly coated.
Mix crushed crackers with melted butter and the remaining cheese to create a crumbly topping.
Transfer the squash mixture to the dish, add the topping, and bake for 20–25 minutes until golden and bubbly, then serve warm.

Notes

Use a Mix of Cheeses: Combining sharp cheddar cheese with a milder cheese gives the dish a richer flavor. A little grated parmesan on top also adds a nice golden crust.
Add a Crispy Topping: Crushed ritz crackers or breadcrumbs mixed with melted butter create a crunchy layer that balances the creamy filling. Don’t skip buttery crackers, it makes the casserole extra special.
Make Ahead Friendly: You can prep the casserole a few hours in advance and keep it in the fridge until baking time. This is perfect if you’re hosting or want less stress at dinnertime.

Nutrition