Do I really need to parboil the zucchini first?

Parboiling isn’t absolutely required, but it helps prevent a watery casserole. Zucchini holds a lot of moisture, and the quick boil draws some of that out before baking. If you skip it, expect a softer texture and plan to add extra baking time.

Why did my cheesy zucchini casserole turn out watery?

This usually happens when the zucchini releases too much liquid during baking. Make sure the zucchini is well drained after parboiling and avoid overcrowding the dish. Letting the casserole rest for a few minutes after baking also helps it set up properly.

Can I use yellow squash instead of zucchini?

Yes, yellow squash works just as well in this recipe. It has a similar moisture level and mild flavor, so the texture and taste will stay very close to the original. You can even use a mix of both if that’s what you have.

Can I make this easy cheesy zucchini casserole ahead of time?

You can assemble the casserole a few hours in advance and refrigerate it until ready to bake. For best results, add the breadcrumb topping right before it goes into the oven. This keeps the top from getting soggy.

Easy Cheesy Zucchini Casserole That Feels Like Home

Description

A creamy, comforting easy cheesy zucchini casserole made with tender zucchini, sharp cheddar cheese, and a golden breadcrumb topping. This simple vegetable casserole uses everyday ingredients and bakes into a warm, family-friendly side dish that works for weeknights, potlucks, and holiday meals.

Ingredients

Scale

4 cups zucchini, diced into 1-inch pieces
1 cup mayonnaise
1 cup shredded cheddar cheese
2 large eggs, slightly beaten
1 teaspoon black pepper
3/4 to 1 teaspoon garlic powder
1/4 cup panko breadcrumbs
1 tablespoon butter, melted

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Instructions

Bring a pot of water to a boil, add the diced zucchini, and cook for 3 minutes to lightly soften and release excess moisture. Drain well and allow the zucchini to cool slightly.
Preheat the oven to 350°F and lightly grease a 1½-quart baking dish.
In a large bowl, combine the zucchini, mayonnaise, shredded cheddar cheese, beaten eggs, black pepper, and garlic powder, stirring gently until evenly coated and creamy.
Spread the mixture evenly into the prepared baking dish.
In a small bowl, mix the panko breadcrumbs with the melted butter, then sprinkle evenly over the top of the casserole.
Bake uncovered for about 35 minutes, until the top is lightly golden, the edges are bubbling, and the center feels set.
Remove from the oven and let the casserole rest for 5 to 10 minutes before serving.

Notes

Parboiling the zucchini helps prevent excess moisture and keeps the casserole from becoming watery.
If skipping the parboiling step, expect a softer texture and add additional baking time as needed.
For make-ahead prep, assemble the casserole a few hours in advance and add the breadcrumb topping just before baking.
Yellow squash can be used in place of zucchini, or combined with it, with similar results.

Prep Time: 10 minutes
Cook Time: 45 minutes
Category: Side Dish
Method: Baking
Cuisine: American

Nutrition

Serving Size: 1 serving
Calories: 220
Sugar: 3 g
Sodium: 360 mg
Fat: 18 g
Saturated Fat: 6 g
Unsaturated Fat: 10 g
Trans Fat: 0 g
Carbohydrates: 8 g
Fiber: 1 g
Protein: 6 g
Cholesterol: 75 mg