Comfort Classics

Beef And Onion Casserole

Name: Beef And Onion Casserole
Prep time: 20 min
Cook time: 35 min
Total time: 55 min
Yield: 6 servings
Ingredients: 1 lb (450g) ground beef; 2 large onions, chopped; 2 cups (250g) pasta; 2 cups (220g) grated cheese; 1 tsp (5g) dried oregano; 1 tsp (5g) garlic powder; 1/2 tsp (2g) salt; 1/4 tsp (1g) black pepper; 2 tbsp (30g) olive oil; 1 cup (250ml) beef broth; 1 cup (120g) breadcrumbs; 2 tbsp (30g) chopped fresh parsley

By Priya Norwood · June 19, 2026 · Comfort Classics

Prep20 min

Cook35 min

Total55 min

Serves6

Beef And Onion Casserole — Warm, savory beef and onion casserole

There's something special about a warm, comforting casserole that brings everyone together. As a home cook, I've always loved creating dishes that are not only delicious but also easy to make and perfect for sharing. My Beef And Onion Casserole is one of those recipes that never fails to impress. It's a classic comfort food dish that combines tender beef, caramelized onions, and a rich, savory sauce, all topped with a crispy, golden-brown crust.

I remember making this casserole for my family on a chilly winter evening, and the aroma that filled the kitchen was incredible. The combination of slow-cooked beef and onions, mixed with the perfect blend of spices and herbs, created a dish that was both hearty and flavorful. It's a recipe that I've perfected over the years, and I'm excited to share it with you.

This Beef And Onion Casserole is perfect for a weeknight dinner or a special occasion. It's easy to make ahead and can be refrigerated or frozen for later use. The best part is that it's a one-dish wonder, meaning you can cook and serve it all in the same dish. No fuss, no muss. Just a delicious, satisfying meal that's sure to become a family favorite.

So, what makes this casserole so special? For starters, it's the combination of tender beef and caramelized onions. The beef is slow-cooked in a rich, savory sauce that's made with a blend of spices and herbs, while the onions are cooked until they're sweet and caramelized. The result is a dish that's both flavorful and textured, with a crispy crust on top and a tender, juicy interior.

In this recipe, I'll walk you through the steps to create this delicious Beef And Onion Casserole. From preparing the ingredients to cooking and serving, I'll share my tips and tricks for making this dish a success. So, let's get started and make some memories around the dinner table!

Why You’ll Love This Recipe

This Beef And Onion Casserole is a one-dish wonder that's easy to make and perfect for sharing.
The combination of tender beef and caramelized onions creates a dish that's both flavorful and textured.
The casserole is made with a blend of spices and herbs that adds depth and complexity to the dish.
The crispy, golden-brown crust on top adds a satisfying crunch to the dish.
The casserole is perfect for a weeknight dinner or a special occasion.
It's easy to make ahead and can be refrigerated or frozen for later use.

Why This Recipe Works

The key to a great Beef And Onion Casserole is in the layering of the ingredients. By starting with a layer of sautéed onions and beef, you create a flavorful foundation for the dish. The onions are cooked until they're caramelized, which brings out their natural sweetness and adds depth to the dish. The beef is then added, along with a blend of spices and herbs, to create a rich and savory sauce.

The next layer is the pasta, which helps to soak up the sauce and adds texture to the dish. I like to use a combination of pasta and grated cheese to create a creamy, cheesy sauce that's both comforting and indulgent. Finally, the top layer is a crispy, golden-brown crust that's made with a blend of breadcrumbs and grated cheese. This crust adds a satisfying crunch to the dish and helps to keep the casserole moist and flavorful.

The cooking process is also important, as it helps to bring all the flavors together. By cooking the casserole in a moderate oven, you allow the flavors to meld together and the sauce to thicken, creating a rich and satisfying dish. The result is a Beef And Onion Casserole that's both comforting and delicious, with a crispy crust and a tender, juicy interior.

Ingredients You’ll Need

To make this delicious Beef And Onion Casserole, you'll need a few simple ingredients. The key players are ground beef, onions, pasta, grated cheese, and a blend of spices and herbs. You'll also need some olive oil, salt, and pepper to bring out the flavors. When shopping for the ingredients, look for high-quality ground beef that's lean and flavorful, and choose a good-quality pasta that will hold up well to the sauce.

One of the best things about this recipe is that it's easy to customize to your tastes. You can use different types of cheese, such as cheddar or mozzarella, and add other ingredients like diced bell peppers or mushrooms to the sauce. The possibilities are endless, and I encourage you to experiment and find your favorite combination.

1 lb (450g) ground beefLook for high-quality ground beef that's lean and flavorful, with a fat content of around 20%. This will help to keep the casserole moist and juicy.
2 large onions, choppedChoose onions that are sweet and flavorful, such as Vidalia or yellow onions. Caramelize them slowly over low heat to bring out their natural sweetness.
2 cups (250g) pastaUse a good-quality pasta that will hold up well to the sauce, such as penne or rotini. Cook it al dente, then drain and set aside.
2 cups (220g) grated cheeseChoose a cheese that's rich and creamy, such as cheddar or mozzarella. You can also use a combination of cheeses for a unique flavor profile.
1 tsp (5g) dried oreganoThis herb adds a pungent, earthy flavor to the sauce. Use fresh or dried oregano, depending on your preference.
1 tsp (5g) garlic powderThis spice adds a savory, slightly sweet flavor to the sauce. Use it sparingly, as it can be overpowering.
1/2 tsp (2g) saltUse a high-quality salt that's free of additives and preservatives. This will help to bring out the flavors of the other ingredients.
1/4 tsp (1g) black pepperUse freshly ground black pepper for the best flavor. This will help to add depth and complexity to the sauce.
2 tbsp (30g) olive oilChoose a high-quality olive oil that's rich and flavorful. This will help to add moisture and flavor to the casserole.
1 cup (250ml) beef brothUse a low-sodium beef broth to avoid adding too much salt to the sauce. You can also use homemade broth for a richer flavor.
1 cup (120g) breadcrumbsChoose a good-quality breadcrumb that's crispy and golden. This will help to add texture and crunch to the casserole.
2 tbsp (30g) chopped fresh parsleyUse fresh parsley for the best flavor and texture. This will help to add a bright, fresh flavor to the casserole.

Ingredients for Beef And Onion Casserole

Equipment You’ll Need

Large heavy skillet or wokSharp chef's knifeInstant-read thermometerLarge bowlMeasuring cups and spoonsWooden spoon or spatula9x13 inch baking dish

How to Make Beef And Onion Casserole

1
Preheat the oven to 350°F (180°C).
2
In a large skillet, heat 1 tablespoon of olive oil over medium-high heat. Add the chopped onions and cook until they're caramelized, stirring occasionally. This should take about 20-25 minutes, or until the onions are dark golden brown and fragrant.
3
Add the ground beef to the skillet, breaking it up with a spoon as it cooks. Cook until the beef is browned, about 5-7 minutes.
4
Add the dried oregano, garlic powder, salt, and black pepper to the skillet, stirring to combine. Cook for 1-2 minutes, until the spices are fragrant.
5
Add the beef broth to the skillet, stirring to combine. Bring the mixture to a simmer and cook until the liquid has reduced by half, about 5-7 minutes.
6
While the sauce is cooking, cook the pasta according to the package instructions until it's al dente. Drain and set aside.
7
In a large bowl, combine the cooked pasta, sauce, and grated cheese. Stir until the cheese is melted and the sauce is well combined.
8
Transfer the pasta mixture to a 9x13 inch baking dish. Top with the breadcrumbs and chopped parsley.
9
Drizzle the remaining 1 tablespoon of olive oil over the top of the casserole.
10
Cover the dish with aluminum foil and bake for 25-30 minutes, or until the casserole is hot and the sauce is bubbly.
11
Remove the foil and continue baking for an additional 10-15 minutes, or until the top is golden brown and crispy.
12
Remove the casserole from the oven and let it rest for 10-15 minutes before serving.
13
Serve hot, garnished with additional parsley if desired.

Expert Tips

To add extra flavor to the casserole, use a combination of cheeses, such as cheddar and mozzarella.
If using frozen pasta, thaw it first before cooking.
To make the casserole more substantial, add some diced bell peppers or mushrooms to the sauce.
For a crispy top, broil the casserole for an additional 2-3 minutes after baking.
To make ahead, assemble the casserole up to a day in advance, then refrigerate or freeze until ready to bake.
To reheat, bake the casserole in a preheated oven at 350°F (180°C) for 20-25 minutes, or until hot and bubbly.
To add some extra crunch, sprinkle some chopped nuts or seeds on top of the casserole before baking.

Common Mistakes to Avoid

Not cooking the onions long enough, resulting in a lack of caramelization and flavor.
Overcooking the pasta, resulting in a mushy texture.
Not using enough cheese, resulting in a dry and flavorless casserole.
Not letting the casserole rest before serving, resulting in a messy and difficult-to-serve dish.
Not using a high-quality ground beef, resulting in a tough and dry casserole.
Not seasoning the casserole enough, resulting in a bland and flavorless dish.

Variations and Substitutions

Add some diced ham or bacon to the sauce for a smoky flavor.
Use different types of cheese, such as feta or parmesan, for a unique flavor profile.
Add some chopped fresh herbs, such as parsley or basil, to the sauce for added flavor.
Use a combination of ground meats, such as beef and pork, for a more complex flavor.
Add some chopped bell peppers or mushrooms to the sauce for added texture and flavor.
Use a different type of pasta, such as penne or rotini, for a change of pace.
Add some chopped nuts or seeds to the top of the casserole for extra crunch.

What to Serve With Beef And Onion Casserole

This Beef And Onion Casserole is perfect for serving with a side of garlic bread or a green salad. You can also serve it with some roasted vegetables, such as broccoli or Brussels sprouts, for a well-rounded meal. If you're looking for a comforting and satisfying meal, this casserole is sure to hit the spot.

Some other ideas for serving this casserole include:

- A side of sautéed spinach or kale for a nutritious and flavorful addition.

- A simple green salad with a light vinaigrette for a refreshing contrast.

- A side of roasted sweet potatoes or carrots for a sweet and satisfying accompaniment.

Garlic breadGreen saladRoasted vegetablesSimple green saladSautéed spinach or kaleRoasted sweet potatoes or carrots

Make-Ahead, Storage, Freezing and Reheating

This Beef And Onion Casserole can be made ahead and stored in the refrigerator for up to a day or frozen for up to 3 months. To reheat, simply bake the casserole in a preheated oven at 350°F (180°C) for 20-25 minutes, or until hot and bubbly.

To freeze, assemble the casserole up to the point of baking, then wrap it tightly in plastic wrap or aluminum foil and place it in a freezer-safe bag. When you're ready to bake, simply thaw the casserole overnight in the refrigerator, then bake as directed.

To reheat a frozen casserole, bake it in a preheated oven at 350°F (180°C) for 30-35 minutes, or until hot and bubbly.

Some tips for storing and reheating this casserole include:

- Letting it cool completely before refrigerating or freezing to prevent moisture from accumulating.

- Using a high-quality freezer bag or container to prevent freezer burn.

- Labeling the casserole with the date and contents, so you can easily keep track of how long it's been stored.

Frequently Asked Questions

Can I use ground turkey or pork instead of beef?

Yes, you can use ground turkey or pork as a substitute for beef. Just keep in mind that the flavor and texture may be slightly different.

Can I add other ingredients to the sauce, such as diced bell peppers or mushrooms?

Yes, you can add other ingredients to the sauce to suit your tastes. Just be sure to cook them until they're tender before adding them to the casserole.

Can I make this casserole in advance and refrigerate or freeze it?

Yes, you can make this casserole in advance and refrigerate or freeze it. Just be sure to follow the storage and reheating instructions above.

Can I use a different type of cheese, such as feta or parmesan?

Yes, you can use a different type of cheese to suit your tastes. Just keep in mind that the flavor and texture may be slightly different.

Can I serve this casserole with a side of garlic bread or a green salad?

Yes, this casserole is perfect for serving with a side of garlic bread or a green salad. You can also serve it with some roasted vegetables or a simple green salad for a well-rounded meal.

How long does it take to cook the casserole?

The casserole takes about 35-40 minutes to cook, including the time it takes to preheat the oven and cook the pasta.

Can I use leftover cooked pasta instead of cooking it from scratch?

Yes, you can use leftover cooked pasta instead of cooking it from scratch. Just be sure to reheat it before adding it to the casserole.

Can I make this casserole in a slow cooker?

Yes, you can make this casserole in a slow cooker. Just cook the onions and beef in a skillet, then add all the ingredients to the slow cooker and cook on low for 3-4 hours.

The Full Recipe

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