Cheesy Shredded Zucchini Casserole Recipe

1. Introduction: Why You’ll Love This Dish

Ever stare at a pile of zucchinis in your fridge and think, What on earth am I going to do with all these? You’re not alone. That’s where this Shredded Zucchini Casserole swoops in like a dinnertime hero. It’s hearty, cheesy, super flavorful, and a fantastic way to sneak veggies into your meals—especially for picky eaters.

Whether you’re looking for a comforting side dish or a light vegetarian main, this casserole checks all the boxes. Plus, it’s budget-friendly, easy to prep, and makes great leftovers.

2. Ingredients: Your Shopping List

Here’s everything you’ll need to whip up this cozy casserole. Most of these items are pantry staples, and you might already have them at home!

Produce:

4 medium zucchinis (about 5 cups shredded)
1 small yellow onion, finely chopped
2 cloves garlic, minced

Dairy:

1 cup shredded cheddar cheese (sharp cheddar works great)
½ cup grated Parmesan cheese
½ cup sour cream (full fat for best flavor)
2 large eggs

Pantry/Other:

¾ cup breadcrumbs (Italian-seasoned or plain with Italian herbs added)
1 tsp salt
½ tsp black pepper
½ tsp dried oregano
¼ tsp red pepper flakes (optional, for a slight kick)
2 tbsp olive oil or melted butter

Recommended Brands:

Cheddar Cheese: Tillamook or Cabot for bold flavor
Parmesan: Use freshly grated if possible (Parmigiano-Reggiano if you want to splurge)
Breadcrumbs: Progresso Italian-style is a solid choice

3. Preparation Steps: Breaking It Down Step-by-Step

Let’s keep it simple and easy to follow—Barney style.

Step 1: Prep the Zucchini

Wash and trim the ends off your zucchinis.
Shred them using a box grater or food processor.
Place the shredded zucchini in a clean kitchen towel or cheesecloth, then squeeze out as much moisture as possible. This step is super important—wet zucchini = soggy casserole.

Step 2: Preheat the Oven

Preheat your oven to 375°F (190°C).
Lightly grease a 9×9-inch baking dish with olive oil or cooking spray.

Step 3: Mix the Ingredients

In a large mixing bowl, combine the shredded zucchini, chopped onion, garlic, cheddar cheese, Parmesan, sour cream, eggs, and all your seasonings (salt, pepper, oregano, red pepper flakes).
Mix until everything is well combined.

Step 4: Add Breadcrumbs

Stir in ½ cup of breadcrumbs into the mixture.
Save the remaining ¼ cup for topping.

4. Cooking Instructions: Let’s Bake!

Step 1: Transfer & Top

Pour the zucchini mixture into your prepared baking dish.
Smooth out the top with a spatula.
Sprinkle the remaining ¼ cup of breadcrumbs on top and drizzle with olive oil or melted butter. This gives it a golden, crispy finish.

Step 2: Bake It

Bake uncovered for 35–40 minutes, or until the top is golden brown and the center is set.
You’ll know it’s done when it’s firm to the touch and no longer jiggly in the center.

Secret Tips for Success:

Don’t skip draining the zucchini! Extra moisture can ruin the texture.
For extra crunch, mix some crushed Ritz crackers or panko with the breadcrumbs for the topping.
Add a handful of chopped fresh herbs like parsley or basil for brightness.

5. Serving Suggestions: What to Pair It With

This dish is super versatile! Here are a few serving ideas:

Main Dish: Serve with grilled chicken, salmon, or baked tofu for a complete meal.
Side Dish: It pairs beautifully with roasted meats or a fresh summer salad.
Garnish Ideas: Sprinkle with chopped parsley, basil, or chives for a fresh pop of color and flavor. A dollop of sour cream or Greek yogurt on top is chef’s kiss.

6. Additional Tips & Variations

Want to switch things up or make it diet-friendly? Here are some ideas:

Low-Carb/Keto:

Swap breadcrumbs with almond flour or crushed pork rinds.

Gluten-Free:

Use gluten-free breadcrumbs or rolled oats (pulsed in a food processor).

Add Protein:

Mix in cooked shredded chicken, bacon bits, or Italian sausage.

More Veggies:

Add in grated carrot, corn, or chopped spinach for more color and nutrients.

Vegan Option:

Use flax eggs (1 tbsp flax + 3 tbsp water = 1 egg), plant-based cheese, and vegan sour cream.

7. Wrap-Up: Final Thoughts & Fun Facts

So there you have it—your new go-to zucchini recipe. This Shredded Zucchini Casserole is one of those dishes that surprises you with how simple yet satisfying it is. It’s creamy, cheesy, and full of texture, while letting the humble zucchini shine.

Fun Fact:

Zucchinis are technically a fruit! But we treat them like veggies because they work so well in savory dishes.

Whether you’re meal prepping or feeding a crowd, this casserole is a total win. Plus, it freezes well—so make a double batch and thank yourself later!