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Home » Recipes » Dinner

Summer Squash Delight Casserole

Published: May 27, 2025 by Janet · This post may contain affiliate links · Leave a Comment

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Why You’ll Love This Recipe

This casserole is a celebration of summer's bounty, transforming simple yellow squash into a flavorful and satisfying dish. The creamy interior, enhanced by cheddar cheese and mayonnaise, is complemented by the crispy cornflake topping, creating a delightful contrast in every bite. It's easy to prepare, making it an ideal choice for both weeknight meals and special occasions.

Ingredients

  • 2 small yellow summer squash, sliced

  • ¼ cup chopped onion

  • ½ teaspoon salt, divided

  • 1 large egg

  • ¼ cup mayonnaise

  • 2 teaspoons sugar

  • Pepper to taste

  • ¼ cup shredded cheddar cheese

  • 2 tablespoons crushed cornflakes

  • 1-½ teaspoons butter, melted

(Tip: You'll find the full list of ingredients and measurements in the recipe card below.)

Directions

  1. Prepare the Squash: In a small saucepan, combine the sliced squash, chopped onion, and ¼ teaspoon of salt. Cover with water and bring to a boil over medium-high heat. Reduce heat and simmer, uncovered, until the squash is crisp-tender, about 2 minutes. Drain thoroughly to remove excess water.

  2. Make the Casserole Mixture: In a small bowl, whisk together the egg, mayonnaise, sugar, pepper, and the remaining ¼ teaspoon of salt until well blended. Stir in the shredded cheddar cheese and the drained squash mixture, ensuring everything is evenly combined.

  3. Assemble the Casserole: Preheat your oven to 350°F (175°C). Grease a 2-cup baking dish. Transfer the squash mixture into the prepared dish, spreading it out evenly.

  4. Prepare the Topping: In a small bowl, combine the crushed cornflakes and melted butter, tossing to coat the cornflakes evenly. Sprinkle the buttered cornflakes over the top of the casserole.

  5. Bake the Casserole: Place the baking dish in the preheated oven and bake, uncovered, until the top is golden brown and the casserole is bubbly, about 25-30 minutes. Allow to cool slightly before serving.

Servings and Timing

  • Servings: Approximately 4

  • Prep Time: 10 minutes

  • Cook Time: 25-30 minutes

  • Total Time: 35-40 minutes

Variations

  • Add Vegetables: Incorporate other vegetables like zucchini, bell peppers, or mushrooms to enhance the dish's flavor and nutrition.

  • Cheese Options: Experiment with different cheeses such as Monterey Jack, Gruyère, or a blend of cheeses for varied taste profiles.

  • Spice It Up: Add a pinch of cayenne pepper or red pepper flakes for a subtle heat that complements the sweetness of the squash.

Storage/Reheating

  • Storage: Store any leftover casserole in an airtight container in the refrigerator for up to 3 days.

  • Reheating: Reheat in a preheated oven at 350°F (175°C) for 10-15 minutes, or until heated through.

FAQs

How can I make this dish ahead of time?

Assemble the casserole up to the baking step, cover, and refrigerate for up to 24 hours. When ready to bake, add the cornflake topping and bake as directed.

Can I use frozen squash?

Fresh squash is recommended for the best texture and flavor. If using frozen squash, ensure it is thoroughly drained to prevent excess moisture in the casserole.

Is there a gluten-free version of this recipe?

Yes, substitute the crushed cornflakes with gluten-free breadcrumbs or crushed gluten-free crackers to make the dish gluten-free.

Can I freeze this casserole?

Yes, you can freeze the assembled casserole (without baking). Cover tightly and freeze for up to 2 months. Thaw in the refrigerator overnight before baking as directed.

What can I serve this casserole with?

This casserole pairs well with grilled meats like chicken, pork chops, or steak, and complements other summer side dishes like corn on the cob or a fresh garden salad.

Can I use a different type of cheese?

Absolutely! Feel free to experiment with different cheeses such as Monterey Jack, Gruyère, or a blend of cheeses to suit your taste preferences.

How do I prevent the casserole from becoming watery?

Ensure that the squash is thoroughly drained after cooking to remove excess moisture. This step is crucial to achieving the desired casserole consistency.

Can I add meat to this casserole?

Yes, you can add cooked ground sausage or bacon bits to the casserole mixture for added flavor.

Is this casserole suitable for vegetarians?

Yes, this dish is vegetarian-friendly. Ensure all ingredients used are vegetarian-certified if needed.

How do I know when the casserole is done?

The casserole is done when the top is golden brown and the edges are bubbling. A knife inserted into the center should come out clean.

Conclusion

The Cheesy Summer Squash Casserole is a delightful dish that showcases the versatility of summer squash. Its creamy interior and crispy topping make it a crowd-pleaser at any meal. Whether served as a side dish or a main course, it's sure to become a family favorite.

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Summer Squash Delight Casserole

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A comforting cheesy summer squash casserole featuring tender squash, sharp cheddar cheese, and a crunchy cornflake topping, perfect for family dinners or potlucks.

  • Author: Janet
  • Prep Time: 10 minutes
  • Cook Time: 25-30 minutes
  • Total Time: 35-40 minutes
  • Yield: 4 servings
  • Category: Side Dish
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Ingredients

2 small yellow summer squash, sliced

¼ cup chopped onion

½ teaspoon salt, divided

1 large egg

¼ cup mayonnaise

2 teaspoons sugar

Pepper to taste

¼ cup shredded cheddar cheese

2 tablespoons crushed cornflakes

1-½ teaspoons butter, melted

Instructions

  1. Prepare the Squash: In a small saucepan, combine the sliced squash, chopped onion, and ¼ teaspoon of salt. Cover with water and bring to a boil over medium-high heat. Reduce heat and simmer, uncovered, until the squash is crisp-tender, about 2 minutes. Drain thoroughly to remove excess water.
  2. Make the Casserole Mixture: In a small bowl, whisk together the egg, mayonnaise, sugar, pepper, and the remaining ¼ teaspoon of salt until well blended. Stir in the shredded cheddar cheese and the drained squash mixture, ensuring everything is evenly combined.
  3. Assemble the Casserole: Preheat your oven to 350°F (175°C). Grease a 2-cup baking dish. Transfer the squash mixture into the prepared dish, spreading it out evenly.
  4. Prepare the Topping: In a small bowl, combine the crushed cornflakes and melted butter, tossing to coat the cornflakes evenly. Sprinkle the buttered cornflakes over the top of the casserole.
  5. Bake the Casserole: Place the baking dish in the preheated oven and bake, uncovered, until the top is golden brown and the casserole is bubbly, about 25-30 minutes. Allow to cool slightly before serving.

Notes

  • Add other vegetables like zucchini, bell peppers, or mushrooms for extra flavor and nutrition.
  • Try different cheeses such as Monterey Jack or Gruyère for varied taste.
  • Add a pinch of cayenne pepper or red pepper flakes for a subtle heat.
  • Store leftovers in an airtight container in the refrigerator for up to 3 days.
  • Reheat in a 350°F (175°C) oven for 10-15 minutes until heated through.
  • For gluten-free, substitute crushed cornflakes with gluten-free breadcrumbs or crackers.
  • You can freeze the assembled casserole (without baking) for up to 2 months; thaw overnight before baking.
  • Ensure squash is thoroughly drained to avoid a watery casserole.
  • Optionally add cooked ground sausage or bacon bits for added flavor.
  • This casserole is vegetarian-friendly.

Nutrition

  • Serving Size: ¼ of casserole
  • Calories: 190
  • Sugar: 3g
  • Sodium: 350mg
  • Fat: 12g
  • Saturated Fat: 3g
  • Unsaturated Fat: 8g
  • Trans Fat: 0g
  • Carbohydrates: 15g
  • Fiber: 2g
  • Protein: 6g
  • Cholesterol: 75mg

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Hi, I’m Janet! Welcome to Recipes by Janet, where I share simple, delicious, and reliable recipes for every meal.

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