Cheesy Mashed Potato & Ground Beef Casserole Recipe

I love cooking a delicious, hearty meal. But I absolutely dread the mountain of dirty pots, pans, and utensils that inevitably follows.

If you’re like me, you’ve probably wondered if a truly satisfying dinner and a clean kitchen can coexist. I’m here to tell you they absolutely can with this Cheesy Mashed Potato & Ground Beef Casserole.

This recipe is my ultimate weeknight savior. It delivers incredible comfort food with a cleanup process so simple, it almost feels like magic. If you enjoy this style of cooking, you should definitely try our One-Pan Garlic Shrimp Scampi for easy cleanup too.

Recipe Overview

Let’s get straight to the good stuff. Here’s everything you need to know about this lifesaver of a meal.

• Cuisine: American
• Category: Main Course
• Prep Time: 15 minutes
• Cook Time: 35 minutes
• Total Time: 50 minutes
• Servings: 6

The Magic of a One-Pot (or One-Pan) Meal

I remember the first time I successfully made a complete meal in one dish. It felt like I had unlocked a secret level of adulthood.

This casserole is the epitome of that efficiency. We brown the beef, build the flavors, and bake it all in a single oven-safe skillet or casserole dish.

You get layers of savory beef, creamy potatoes, and melted cheese without a sink full of evidence. It’s a game-changer for busy lives.

PREPARATION

Part of the beauty of this dish is its humble ingredient list. I bet you have most of these staples in your kitchen right now.

We’re focusing on simple, flavorful components that work together beautifully. The star, of course, is that glorious cheesy potato topping. For another fantastic chicken dish with amazing flavor, check out our delicious Pesto Chicken recipe.

Recipe

Cheesy Mashed Potato & Ground Beef Casserole Recipe

Make Cheesy Mashed Potato & Ground Beef Casserole Recipe with simple ingredients and clear steps. Prep, cook, and enjoy—perfect for cozy evenings.

Author: Jennifer McDonallds

Prep: 15 min | Cook: 35 min | Total: 50 min

Serves: - 4 + bites

★ Rate 🖨 Print

The Full Ingredient List

• 1 lb lean ground beef
• 1 medium yellow onion, diced
• 2 cloves garlic, minced
• 1 cup frozen corn
• 1 (15 oz) can tomato sauce
• 1 tsp dried oregano
• 1 tsp smoked paprika
• Salt and black pepper to taste
• 4 cups prepared mashed potatoes (homemade or store-bought)
• 1 ½ cups shredded cheddar cheese, divided
• 2 tbsp chopped fresh parsley for garnish (optional)

My “Less Mess” Cooking Method (Step-by-Step)

1

Preheat your oven to 375°F (190°C). This is the only waiting you’ll have to do.

2

In a large, oven-safe skillet, brown the ground beef over medium-high heat. I break it up with a spoon as it cooks.

3

Add the diced onion and cook until the beef is no longer pink and the onion is soft. This builds a fantastic flavor base.

4

Stir in the minced garlic and cook for one more minute until fragrant. Your kitchen will smell amazing.

5

Drain any excess grease from the skillet. This is a key step for a non-greasy final dish.

6

Add the frozen corn, tomato sauce, oregano, paprika, salt, and pepper. Stir everything until it’s perfectly combined.

7

Let the beef mixture simmer for about 5 minutes. This allows all the flavors to meld together wonderfully.

8

Meanwhile, in a separate bowl, mix your prepared mashed potatoes with 1 cup of the shredded cheddar cheese.

9

Spread the cheesy mashed potatoes evenly over the beef mixture in the skillet. I use a spatula to create pretty swirls on top.

10

Sprinkle the remaining ½ cup of cheese over the potato layer. More cheese is always a good idea in my book.

11

Transfer the skillet to the preheated oven and bake for 20-25 minutes. You’ll know it’s done when the cheese is bubbly and golden.

12

Let it rest for 5 minutes before serving. Garnish with fresh parsley if you’re feeling fancy. Then, dig in!

Notes

Enjoy your homemade Cheesy Mashed Potato & Ground Beef Casserole Recipe!

Nutrition Information

Calories: ~450

Protein: 28g

Carbohydrates: 35g

Fat: 22g

Fiber: 4g

Did You Make This?

Leave a review and tag us on social media!

The Full Ingredient List

Gather these simple ingredients. I promise, the result is so much greater than the sum of its parts.

• 1 lb lean ground beef
• 1 medium yellow onion, diced
• 2 cloves garlic, minced
• 1 cup frozen corn
• 1 (15 oz) can tomato sauce
• 1 tsp dried oregano
• 1 tsp smoked paprika
• Salt and black pepper to taste
• 4 cups prepared mashed potatoes (homemade or store-bought)
• 1 ½ cups shredded cheddar cheese, divided
• 2 tbsp chopped fresh parsley for garnish (optional)

My “Less Mess” Cooking Method (Step-by-Step)

Follow these steps, and you’ll have dinner on the table with minimal fuss. I’ve included my personal tips for keeping the mess contained.

1. Preheat your oven to 375°F (190°C). This is the only waiting you’ll have to do.
2. In a large, oven-safe skillet, brown the ground beef over medium-high heat. I break it up with a spoon as it cooks.
3. Add the diced onion and cook until the beef is no longer pink and the onion is soft. This builds a fantastic flavor base.
4. Stir in the minced garlic and cook for one more minute until fragrant. Your kitchen will smell amazing.
5. Drain any excess grease from the skillet. This is a key step for a non-greasy final dish.
6. Add the frozen corn, tomato sauce, oregano, paprika, salt, and pepper. Stir everything until it’s perfectly combined.
7. Let the beef mixture simmer for about 5 minutes. This allows all the flavors to meld together wonderfully.
8. Meanwhile, in a separate bowl, mix your prepared mashed potatoes with 1 cup of the shredded cheddar cheese.
9. Spread the cheesy mashed potatoes evenly over the beef mixture in the skillet. I use a spatula to create pretty swirls on top.
10. Sprinkle the remaining ½ cup of cheese over the potato layer. More cheese is always a good idea in my book.
11. Transfer the skillet to the preheated oven and bake for 20-25 minutes. You’ll know it’s done when the cheese is bubbly and golden.
12. Let it rest for 5 minutes before serving. Garnish with fresh parsley if you’re feeling fancy. Then, dig in!

Pro-Tips for Perfect One-Pot Cooking

I’ve made this dish dozens of times. These little tips make a big difference in both flavor and cleanup.

First, use the right size pot. A 10-inch or 12-inch oven-safe skillet is ideal. Too small, and it will bubble over. Too large, and the layers will be too thin.

Don’t stir the casserole once it’s in the oven. Let the heat work its magic to create those beautiful, distinct layers we all love.

If you don’t have an oven-safe skillet, no problem. Simply transfer the beef mixture to a standard 9×13 inch casserole dish before adding the potato topping.

Storing & Reheating (Easy!)

This casserole is fantastic for meal prep. It reheats like a dream, making your future self very happy.

Let the casserole cool completely. Then, store it in an airtight container in the refrigerator for up to 4 days.

To reheat, I prefer the oven. Cover it with foil and warm at 350°F until heated through. The microwave works in a pinch, but the oven keeps the topping texture perfect.

Nutrition Notes

While this is a comfort food dish, it’s helpful to know what you’re enjoying. These are approximate values per serving.

• Calories: ~450
• Protein: 28g
• Carbohydrates: 35g
• Fat: 22g
• Fiber: 4g

If you’re looking for another comforting pasta dish that’s just as easy to make, don’t miss our hearty Chicken Spaghetti recipe.

Your One-Pot Questions, Answered

I get a lot of questions about this recipe. Here are answers to the most common ones.

Can I make this casserole ahead of time?

Absolutely! You can assemble the entire casserole, cover it tightly, and refrigerate it for up to 24 hours before baking. Just add a few extra minutes to the baking time since it will be going in cold.

What can I use instead of ground beef?

Ground turkey or chicken work wonderfully as a leaner alternative. For a plant-based version, your favorite plant-based ground “meat” is a fantastic swap.

My mashed potatoes are runny. Will that work?

Thicker mashed potatoes are best here. If yours are runny, you can stir in a tablespoon or two of grated Parmesan cheese to help thicken them up before spreading.

This casserole is proof that you don’t have to choose between a delicious, home-cooked meal and a clean kitchen. It’s the ultimate win-win for us food lovers who value our time.

I hope this recipe brings as much joy and ease to your table as it has to mine. It’s a family favorite that never fails to impress.

Enjoy all that flavor (and your clean kitchen!). Let me know how it went by leaving a comment and rating below!