Flavorful Zucchini Dill Casserole
Zucchini Dill Casserole is one of those dishes that has become a favorite in my household, especially when zucchini is in season. I’ve tried several casserole recipes over the years, but most were either too watery or lacked the bright, fresh flavor I was craving. After a few experiments, I finally perfected a version that balances creamy texture, a hint of dill, and just enough crispiness on top. It’s now a go-to for weeknight dinners and even potlucks.

This casserole is light, flavorful, and versatile enough to pair with chicken, fish, or even to enjoy as a vegetarian main dish. The fresh dill really elevates the flavor, giving it that unmistakable, herbaceous aroma.
Ingredients
- 3 medium zucchini, thinly sliced
- 1 small onion, finely chopped
- 1 cup sour cream or Greek yogurt
- 1 cup shredded cheddar or Swiss cheese
- ½ cup breadcrumbs or panko
- 2 tablespoons fresh dill, chopped (or 1 teaspoon dried dill)
- 2 tablespoons butter, melted
- Salt and black pepper, to taste
- 1 teaspoon garlic powder
Preparing the Zucchini
Step 1: Slice and Drain
- Wash and dry the zucchini thoroughly
- Slice into ¼-inch thick rounds
- Sprinkle lightly with salt and let sit for 10 minutes to draw out excess moisture
- Pat dry with a paper towel
Removing extra moisture is key to preventing a soggy casserole.
Step 2: Preheat the Oven
- Preheat oven to 375°F (190°C)
- Grease a 9×13-inch baking dish with butter or oil
Mixing the Casserole
Step 3: Combine Ingredients
- In a large bowl, mix sour cream (or yogurt), half of the cheese, garlic powder, chopped dill, salt, and pepper
- Stir in the zucchini and onion until everything is coated evenly
Step 4: Layer and Top
- Pour the zucchini mixture into the prepared baking dish
- Spread evenly
- Sprinkle the remaining cheese on top
- Mix breadcrumbs with melted butter and sprinkle over the cheese
This creates a crispy, golden topping that contrasts perfectly with the creamy interior.
Baking Instructions
Step 5: Bake
- Bake uncovered for 30–35 minutes
- Check the top for golden brown color and bubbly edges
- For extra crispiness, broil the casserole for the last 2–3 minutes, watching carefully
Tips for the Best Zucchini Dill Casserole
- Drain zucchini thoroughly to avoid a watery casserole
- Use fresh dill if possible for a more vibrant flavor
- Mix cheeses for a richer taste (cheddar, Swiss, or Gruyère)
- Do not overcrowd the dish—spread zucchini evenly for uniform cooking
- Let it rest for a few minutes before serving to set the layers

Variations
- Add cooked chicken or turkey for a protein boost
- Mix in cooked rice or quinoa for a heartier version
- Include other herbs like parsley or chives
- Add a sprinkle of paprika or nutmeg for subtle warmth
Serving Suggestions
- Serve alongside roasted meats or grilled fish
- Pair with a fresh salad for a light meal
- Enjoy as a vegetarian main course
- Reheat leftovers in the oven to maintain the crispy topping
Storage and Reheating
Storing
- Let cool completely
- Store 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
- Cover with foil to prevent the top from burning if needed
FAQs
Can I make this casserole ahead of time?
Yes, assemble it a few hours in advance and bake when ready to serve. You can also refrigerate overnight.
Can I freeze it?
Yes, bake it first, let it cool, then freeze it in a covered container. Reheat in the oven before serving.
Can I use frozen zucchini?
Yes, but make sure to thaw and squeeze out all excess liquid before using.
Can I substitute yogurt for sour cream?
Yes, Greek yogurt works well and adds a slightly tangy flavor while keeping it creamy.
Can I make it dairy-free?
Yes, use a non-dairy yogurt and dairy-free cheese alternatives, and replace butter with olive oil for the topping.
This Zucchini Dill Casserole has become a staple in my cooking because it’s easy, flavorful, and satisfying. The combination of creamy zucchini, bright dill, and a crunchy topping makes it a recipe that always gets rave reviews. It’s perfect for weeknights, gatherings, or even as a cozy solo meal when you want something comforting yet light.

Zucchini Dill Casserole
Ingredients
- 3 medium zucchini thinly sliced
- 1 small onion finely chopped
- 1 cup sour cream or Greek yogurt
- 1 cup shredded cheddar or Swiss cheese divided
- ½ cup breadcrumbs or panko
- 2 tablespoons fresh dill chopped (or 1 teaspoon dried dill)
- 2 tablespoons butter melted
- 1 teaspoon garlic powder
- Salt and black pepper to taste
Instructions
- Preheat oven to 375°F (190°C) and grease a 9×13-inch baking dish with butter or oil.
- Wash and dry zucchini, slice into ¼-inch thick rounds.
- Sprinkle zucchini lightly with salt and let sit 10 minutes to draw out excess moisture.
- Pat zucchini dry with a paper towel.
- In a large bowl, mix sour cream (or yogurt), half of the cheese, garlic powder, chopped dill, salt, and pepper.
- Stir in zucchini and chopped onion until evenly coated.
- Pour zucchini mixture into the prepared baking dish and spread evenly.
- Sprinkle remaining cheese on top.
- Mix breadcrumbs with melted butter and sprinkle over the cheese layer.
- Bake uncovered for 30–35 minutes until bubbly and golden on top.
- Optional: broil for 2–3 minutes at the end for extra crispiness, watching carefully.
- Let casserole rest for a few minutes before serving to set the layers.
