Mashed Potato Casserole Recipe

If you're looking for a comforting and crowd-pleasing side dish, this mashed potato casserole recipe is just what you need. With creamy mashed potatoes, rich cheese, and a crispy topping, this casserole is perfect for family dinners, holidays, or potlucks. Read on to learn how to create this delicious and satisfying dish.

What is Mashed Potato Casserole?

Mashed potato casserole is a baked dish that combines creamy mashed potatoes with cheese, butter, and seasonings, often topped with breadcrumbs or crispy onions for added texture. This dish takes traditional mashed potatoes to the next level, making it a favorite comfort food that’s perfect for any occasion.

Ingredients List for Mashed Potato Casserole

To make this delicious casserole, you'll need the following ingredients:

• Potatoes: 4 pounds of russet or Yukon gold potatoes, peeled and cut into chunks
• Butter: ½ cup (1 stick), plus extra for greasing the baking dish
• Milk: 1 cup
• Sour Cream: 1 cup
• Cheddar Cheese: 2 cups, shredded
• Garlic Powder: 1 teaspoon
• Onion Powder: 1 teaspoon
• Salt and Pepper: To taste
• Green Onions: ¼ cup, chopped (optional)
• Breadcrumbs: 1 cup (optional, for topping)
• Parmesan Cheese: ½ cup, grated (optional, for topping)
• Crispy Fried Onions: 1 cup (optional, for topping)

Substitutions and Variations

Customize your mashed potato casserole with these substitutions and variations:

• Potatoes: Use sweet potatoes or a mix of potatoes and cauliflower for a different flavor and texture.
• Butter and Milk: Substitute with plant-based alternatives like margarine and almond milk for a dairy-free version.
• Sour Cream: Use Greek yogurt or a dairy-free yogurt alternative.
• Cheddar Cheese: Experiment with different cheeses like mozzarella, Monterey Jack, or a blend of your favorites.
• Toppings: Swap breadcrumbs for crushed crackers or omit the topping entirely for a simpler dish.

Step-by-Step Cooking Instructions

Follow these detailed steps to prepare your mashed potato casserole:

1. Preheat the Oven: Preheat your oven to 375°F (190°C). Grease a 9x13-inch baking dish with butter or cooking spray.
2. Prepare the Potatoes: Place the potato chunks in a large pot and cover with cold water. Add a generous pinch of salt. Bring to a boil over medium-high heat and cook until the potatoes are tender, about 15-20 minutes. Drain well.
3. Mash the Potatoes:
   • Return the drained potatoes to the pot.
   • Add the butter, milk, sour cream, garlic powder, onion powder, salt, and pepper.
   • Mash until smooth and creamy. Adjust seasoning to taste.
4. Add the Cheese: Stir in 1 ½ cups of shredded cheddar cheese until well combined.
5. Assemble the Casserole:
   • Spread the mashed potato mixture evenly in the prepared baking dish.
   • Sprinkle the remaining ½ cup of cheddar cheese on top.
   • If using, sprinkle breadcrumbs, grated Parmesan cheese, and crispy fried onions over the top.
6. Bake the Casserole:
   • Bake in the preheated oven for 25-30 minutes, or until the cheese is melted and the top is golden brown.
   • If the topping starts to brown too quickly, cover the dish with aluminum foil.
7. Garnish and Serve: Remove from the oven and let the casserole cool for a few minutes. Garnish with chopped green onions before serving, if desired.

How to Cook Mashed Potato Casserole: A Step-by-Step Guide

Creating the perfect mashed potato casserole involves a few key steps. Here’s a detailed guide to ensure your dish turns out perfectly:

1. Selecting the Potatoes: Choose starchy potatoes like russet or Yukon gold for the creamiest texture.
2. Cooking the Potatoes: Start with cold water and bring to a boil. This ensures even cooking. Test for doneness by piercing with a fork; they should be tender and easily break apart.
3. Mashing the Potatoes: Use a potato masher or ricer for smooth, lump-free mashed potatoes. Avoid over-mixing to prevent a gluey texture.
4. Seasoning the Potatoes: Season generously with salt and pepper. Taste as you go to ensure the flavors are balanced.
5. Layering the Casserole: Spread the mashed potatoes evenly and ensure the cheese and toppings cover the entire surface.
6. Baking Time: Bake until the cheese is melted and the top is golden brown. Keep an eye on the casserole to prevent burning.

Common Mistakes to Avoid

Avoid these common mistakes to ensure your mashed potato casserole turns out perfect every time:

• Overcooking the Potatoes: This can make them waterlogged. Drain them well to avoid watery mashed potatoes.
• Undermashing the Potatoes: Ensure the potatoes are smooth and creamy before baking.
• Not Seasoning Enough: Potatoes can be bland without proper seasoning. Taste and adjust as needed.
• Burning the Topping: Keep an eye on the casserole in the oven. Cover with foil if the topping browns too quickly.

Serving and Presentation Tips

Enhance your mashed potato casserole with these serving and presentation tips:

• Use a Decorative Baking Dish: A nice dish can make your casserole look more appealing.
• Garnish Generously: Sprinkle fresh herbs like parsley or chives on top for a pop of color.
• Serve Hot: Mashed potato casserole is best enjoyed hot and fresh from the oven.

How to Serve Mashed Potato Casserole

Here are some ideas for serving your mashed potato casserole:

• As a Side Dish: Perfect alongside roasted meats, poultry, or grilled vegetables.
• At a Potluck: This dish is a crowd-pleaser and easy to transport. Keep it warm until serving.
• For Holidays: A great addition to holiday meals, especially Thanksgiving and Christmas.

Presentation Ideas for Mashed Potato Casserole

Make your mashed potato casserole visually appealing with these presentation ideas:

• Layered Look: Use a clear glass baking dish to show off the layers of mashed potatoes and cheese.
• Colorful Garnishes: Top with colorful vegetables or herbs to brighten up the dish.
• Individual Portions: Serve in small ramekins or mini cast-iron skillets for a cute and portable option.

Mashed Potato Casserole Recipe Tips

Here are some additional tips to help you perfect your mashed potato casserole:

• Make Ahead: Prepare the casserole up to the baking step, cover, and refrigerate. Bake when ready to serve.
• Reheat Gently: If reheating leftovers, do so in the oven to maintain the creamy texture and prevent the cheese from becoming rubbery.
• Experiment with Add-Ins: Add cooked bacon, ham, or sautéed vegetables to the mashed potatoes for extra flavor and texture.

Frequently Asked Questions (FAQs)

Q: Can I use instant mashed potatoes? A: While homemade mashed potatoes are recommended for the best flavor and texture, you can use instant mashed potatoes in a pinch. Prepare them according to the package instructions before assembling the casserole.

Q: How do I store leftovers? A: Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat in the oven for best results.

Q: Can I freeze mashed potato casserole? A: Yes, you can freeze the casserole. Assemble the dish without baking, cover tightly with plastic wrap and aluminum foil, and freeze for up to 2 months. Thaw in the refrigerator before baking.

Q: What can I use instead of sour cream? A: Greek yogurt is a great substitute for sour cream, offering a similar tangy flavor and creamy texture.

Q: Can I add meat to this casserole? A: Yes, cooked and crumbled bacon, diced ham, or shredded chicken can be added to the mashed potatoes for a heartier dish.

Conclusion

This mashed potato casserole recipe is a fantastic addition to any meal. With its creamy, cheesy layers and deliciously crispy topping, it’s sure to become a family favorite. Whether you're serving it for a holiday feast or a simple weeknight dinner, this comforting dish will be a hit. Try this recipe today and enjoy the ultimate comfort food!

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