There’s something incredibly satisfying about a casserole—especially one that’s hearty, wholesome, and layered with flavors that remind you of home. This Ground Beef Zucchini Casserole is one of those dishes I return to again and again. It brings together the savory depth of seasoned ground beef with the mild sweetness of zucchini, all nestled in a creamy, cheesy sauce and baked until perfectly golden.
This recipe is inspired by a classic countryside Italian-style casserole my Nonna used to make during zucchini season. It was her way of using up the bounty from the garden, and let me tell you, nothing ever went to waste in her kitchen. Today, it’s one of those comfort foods that fits beautifully into modern kitchens—whether you’re cooking for a hungry family or meal prepping for the week ahead.
Why You’ll Love This Ground Beef Zucchini Casserole
Ground beef zucchini casserole is not only delicious but also a fantastic way to enjoy a low-carb meal packed with protein and fiber. It’s perfect for summer when zucchini is in abundance, but comforting enough to enjoy during colder months. Plus, it’s easy to adapt to your preferences—swap out cheeses, change the herbs, or even add a bit of spice.
Let’s walk through how to make this savory, cheesy, vegetable-packed masterpiece from scratch.
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Ground Beef Zucchini Casserole: A Hearty Classic with a Fresh Twist
- Total Time: 65 minutes
- Yield: 6 servings 1x
- Diet: Gluten Free
Description
A hearty, savory casserole that combines seasoned ground beef, tender zucchini, and three kinds of cheese into a wholesome and comforting dish. This Ground Beef Zucchini Casserole is easy to prepare, low in carbs, and perfect for any weeknight dinner or family gathering. With rich flavors and simple ingredients, it’s a go-to meal you’ll love to make again and again.
Ingredients
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1 lb ground beef (80/20)
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4 medium zucchinis, sliced ¼-inch thick
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1 medium onion, diced
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2 garlic cloves, minced
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1 can (14.5 oz) diced tomatoes, drained
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2 tbsp tomato paste
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1 cup shredded mozzarella cheese
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½ cup grated Parmesan cheese
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1 cup ricotta cheese (or cottage cheese)
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2 large eggs
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2 tsp Italian seasoning
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1 tsp dried oregano
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Salt and black pepper to taste
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2 tbsp olive oil
Instructions
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Preheat oven to 375°F (190°C).
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Lightly salt zucchini slices and let rest in a colander for 15 minutes. Pat dry.
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In a large skillet, heat olive oil. Sauté diced onions until soft, then add garlic and cook for 30 seconds.
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Add ground beef and cook until browned. Drain excess fat.
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Stir in tomato paste, drained tomatoes, Italian seasoning, oregano, salt, and pepper. Simmer for 10 minutes.
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In a bowl, combine ricotta, eggs, half the Parmesan, salt, and pepper.
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In a greased 9×13 baking dish, layer half the zucchini, half the beef, half the ricotta mixture, and mozzarella. Repeat.
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Top with remaining mozzarella and Parmesan.
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Cover with foil and bake for 25 minutes. Remove foil and bake another 15–20 minutes until golden.
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Let rest 10 minutes before serving.
Notes
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Let zucchini sweat with salt to prevent a watery casserole.
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Swap ricotta for cottage cheese for a lighter version.
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Add red pepper flakes for extra heat.
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Freezes well in portions for meal prep.
- Prep Time: 25 minutes
- Cook Time: 40 minutes
- Category: Main Dish
- Method: Baked
- Cuisine: Italian-American
Nutrition
- Serving Size: 1 slice
- Calories: 410
- Sugar: 4g
- Sodium: 580mg
- Fat: 28g
- Saturated Fat: 13g
- Unsaturated Fat: 13g
- Trans Fat: 0g
- Carbohydrates: 10g
- Fiber: 2g
- Protein: 28g
- Cholesterol: 105mg
Keywords: Ground Beef Zucchini Casserole, Beef Casserole, Low Carb Dinner, Baked Zucchini
Ingredients
This casserole features simple, pantry-friendly ingredients that come together to create layers of rich, creamy, and savory flavors.
Main Ingredients
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1 pound ground beef (preferably 80/20 for flavor)
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4 medium zucchinis, sliced into ¼-inch rounds
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1 medium onion, diced
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2 cloves garlic, minced
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1 can (14.5 oz) diced tomatoes, drained
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1 cup shredded mozzarella cheese
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½ cup grated Parmesan cheese
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1 cup ricotta cheese (or cottage cheese for a lighter version)
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2 large eggs
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2 tablespoons tomato paste
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2 teaspoons Italian seasoning
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1 teaspoon dried oregano
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Salt and black pepper to taste
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2 tablespoons olive oil
Step-by-Step Instructions
1. Prepare the Zucchini
Start by slicing your zucchini into rounds. Lightly salt them and let them sit in a colander for about 15 minutes to draw out excess moisture. This helps prevent a watery casserole. After 15 minutes, pat them dry with paper towels.
2. Brown the Beef
In a large skillet over medium-high heat, add olive oil and sauté the onions until translucent, about 3-4 minutes. Add minced garlic and cook for another 30 seconds. Stir in the ground beef, breaking it apart with a spoon, and cook until no longer pink. Drain excess fat.
3. Season and Combine
Add tomato paste, diced tomatoes, Italian seasoning, oregano, salt, and pepper to the beef mixture. Simmer on low for about 10 minutes, allowing the flavors to meld and the sauce to thicken.
4. Prepare the Cheese Mixture
In a separate bowl, whisk together ricotta cheese, eggs, half of the Parmesan cheese, and a pinch of salt and pepper. This mixture adds a creamy layer and helps bind the casserole.
5. Assemble the Casserole
Preheat your oven to 375°F (190°C). In a greased 9×13-inch baking dish, layer half of the zucchini slices on the bottom. Spread half of the beef mixture over the zucchini, followed by dollops of the ricotta mixture. Sprinkle with a layer of mozzarella.
Repeat the layers: zucchini, beef, ricotta, and finish with mozzarella and the remaining Parmesan on top.
6. Bake to Perfection
Cover the dish with foil and bake for 25 minutes. Remove the foil and bake for another 15-20 minutes, or until the top is bubbly and golden brown.
7. Let It Rest
Allow the casserole to rest for 10 minutes before slicing. This helps the layers set and makes serving easier.
Tips for the Best Ground Beef Zucchini Casserole
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Don’t skip salting the zucchini: This step draws out water and keeps the casserole from becoming soggy.
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Use fresh herbs if possible: While dried herbs are convenient, fresh basil or parsley adds brightness and depth.
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Make it spicy: Add crushed red pepper flakes or chopped jalapeños to the beef mixture for a little heat.
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Meal prep ready: This casserole keeps well in the fridge for up to 4 days and freezes beautifully.
Variations and Substitutions
This recipe is flexible and easily adaptable based on dietary needs or what’s in your pantry.
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Low-Carb/Keto Version: This dish is naturally low in carbs, but you can make it even more keto-friendly by omitting the tomatoes or using a sugar-free version.
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Vegetarian Twist: Swap the ground beef for sautéed mushrooms, lentils, or a plant-based crumble.
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Extra Veggies: Add layers of spinach, chopped bell peppers, or shredded carrots for extra nutrients and color.
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Different Cheeses: Feel free to mix in sharp cheddar, gouda, or a smoky provolone for a unique flavor profile.
What to Serve with Ground Beef Zucchini Casserole
While this dish is a meal in itself, here are some great pairings to make it a feast:
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Garlic bread or crusty Italian loaf
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Fresh green salad with lemon vinaigrette
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Roasted or steamed vegetables
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Creamy polenta or mashed cauliflower
Storing and Reheating
This casserole is fantastic for leftovers.
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Storage: Refrigerate in an airtight container for up to 4 days.
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Freezing: Freeze individual portions or the whole dish for up to 2 months. Wrap well with foil or plastic wrap.
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Reheating: Warm in the oven at 350°F until heated through, or microwave individual slices for 2-3 minutes.
Final Thoughts
There’s nothing quite like the comforting aroma of a ground beef zucchini casserole bubbling away in the oven. It’s one of those back-pocket recipes you can make without much fuss and feel good about serving to family and guests alike.
Whether you’re using up fresh summer zucchini or reaching for something hearty during cooler months, this dish satisfies every time. The combination of seasoned beef, tender zucchini, creamy ricotta, and melted cheese is simply irresistible.
So the next time you’re looking for a filling, delicious, and wholesome dinner idea, give this Ground Beef Zucchini Casserole a try. I promise it’ll earn a permanent spot in your meal rotation.