Cheese Yellow Squash Casserole

Indulge in the comforting flavors of a classic Cheese Yellow Squash Casserole, a crowd-pleasing side dish that's perfect for family gatherings, potlucks, or weeknight dinners. This easy-to-make casserole spotlights tender, sautéed yellow squash and sweet onions coated in a rich, creamy cheddar cheese sauce, all nestled under a golden, crispy breadcrumb and parmesan crust. Made with simple pantry staples like butter, milk, and flour, this dish transforms humble ingredients into a flavorful masterpiece. With just 20 minutes of prep and a quick bake in the oven, this cheesy casserole blends the perfect balance of creamy, crunchy, and savory in every bite. Serve it alongside roast chicken or grilled steak for a meal that will have everyone asking for seconds!

Nutriscore Rating: 63/100

Prep Time:20 mins

Cook Time:30 mins

Total Time:50 mins

Servings: 6

Ingredients

• 6 cups yellow squash
• 1 cup onion
• 1 teaspoon salt
• 0.5 teaspoon black pepper
• 4 tablespoons butter
• 3 tablespoons all-purpose flour
• 1.5 cups milk
• 2 cups sharp cheddar cheese, shredded
• 1 cup breadcrumbs
• 0.25 cup parmesan cheese, grated
• 2 tablespoons olive oil or melted butter
• 0.5 cup water

Directions

Step 1

Preheat the oven to 375°F (190°C).

Step 2

Wash and slice the yellow squash into 1/4-inch thick rounds. Dice the onion finely.

Step 3

In a large skillet, combine the sliced squash, onion, and 1/2 cup of water over medium heat. Cook until the squash is tender, about 5–7 minutes. Drain any excess liquid and set aside.

Step 4

In the same skillet, melt 2 tablespoons of butter over medium heat. Add the flour and whisk constantly to create a roux, cooking for about 1–2 minutes.

Step 5

Gradually pour in the milk while whisking continuously to prevent lumps. Continue whisking until the mixture thickens into a creamy sauce, about 3–5 minutes.

Step 6

Remove the skillet from heat and stir in 1 1/2 cups of shredded cheddar cheese. Add salt and black pepper, and mix until the cheese has melted and the sauce is smooth.

Step 7

Gently fold the cooked squash and onion mixture into the cheese sauce until evenly coated.

Step 8

Transfer the mixture to a greased 9x9-inch casserole dish and spread it out evenly.

Step 9

In a separate bowl, mix the breadcrumbs, grated parmesan cheese, and 2 tablespoons of olive oil or melted butter until combined.

Step 10

Sprinkle the breadcrumb mixture evenly over the squash casserole.

Step 11

Top with the remaining 1/2 cup of shredded cheddar cheese for added richness.

Step 12

Bake in the preheated oven for 20–25 minutes, or until the casserole is bubbly and the topping is golden brown.

Step 13

Remove from the oven and let the casserole cool slightly for 5 minutes before serving.

Step 14

Serve warm and enjoy your cheesy yellow squash casserole!

Nutrition Facts

Serving size	(1847.9g)

Amount per serving	% Daily Value*
Calories	2526.2

Total Fat 167.0g	0%
Saturated Fat 87.8g	0%
Polyunsaturated Fat 2.2g
Cholesterol 424.5mg	0%
Sodium 6292.5mg	0%
Total Carbohydrate 174.4g	0%
Dietary Fiber 14.5g	0%
Total Sugars 55.6g
Protein 104.0g	0%

Vitamin D 218.0IU	0%
Calcium 2548.3mg	0%
Iron 11.6mg	0%
Potassium 2743.0mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 57.4%

Protein: 15.9%

Carbs: 26.7%