Easy Potato Casserole (3 Ingredients!)

This easy potato casserole is rich, creamy, and loaded with cheesy flavor; all from just three simple ingredients! Tender shredded potatoes, sharp cheddar, and tangy sour cream come together for a comforting side that fits any occasion, from weeknight dinners to your holiday table.

This recipe comes straight from Aunt Bee’s kitchen, where simple ingredients and old-fashioned flavor always win. It’s been a staple on our holiday tables for as long as I can remember, and it pairs perfectly with Jiffy corn casserole, scalloped corn, broccoli casserole, or any of the cozy sides from my Thanksgiving recipes.

Before You Get Started

Before you dive in, here are a few quick tips to guarantee success:

• Use red potatoes for the best texture. Their low-starch, high-moisture makeup helps the casserole hold its shape while staying creamy inside.
• Boil just until fork-tender. Overcooked potatoes get gummy once shredded; start checking at the 10-minute mark.
• Grate by hand. Skip the food processor; hand-grating on the large holes gives that perfect hash-brown texture.
• Stick with full-fat sour cream. Low-fat versions add excess liquid and dull the flavor.
• Grate cheese from a block. Pre-shredded cheese contains anti-caking agents that prevent smooth melting.

How to Make Potato Casserole

Whether you’re serving it at a holiday dinner or a Sunday supper, this cheesy potato casserole comes together in minutes. For a shortcut, you can also try my cheesy hash brown casserole.

Here’s how to make it perfectly creamy and golden every time.

Step 1: Boil the Potatoes

Place the potatoes in a large pot and cover with cold water. Bring to a boil and cook just until fork-tender, about 10-15 minutes, depending on size.

** Pro Tip: Stop cooking as soon as you can easily pierce them with a fork but before the skins wrinkle. Over-boiled potatoes lead to a mushy texture later.

Step 2: Cool and Shred

Drain and let the potatoes cool until easy to handle. Peel, then coarsely grate on the large holes of a box grater.

** Quick Note: Coarse shreds help the casserole bake evenly and absorb the sour cream mixture without getting pasty.

Step 3: Mix the Base

In a large bowl, combine shredded potatoes, 2 ½ cups of cheese, and all the sour cream. Add salt and pepper to taste. Stir until evenly coated.

** Pro Tip: Let the cheese and sour cream come to room temperature before mixing; it keeps the mixture creamy and easier to stir.

Step 4: Assemble and Bake

Transfer to a greased 1 ½ – 2 quart baking dish and top with the remaining ½ cup of cheese. Bake, uncovered, at 350°F for 25 minutes, or until hot and bubbly with lightly golden edges.

** Quick Note: For a crispier top, broil for 1-2 minutes at the end (just watch closely so it doesn’t brown too fast).

Step 5: Rest and Serve

Let the casserole rest for about 5-10 minutes before serving so it sets slightly and scoops cleanly. Garnish with parsley, chives, or a pinch of paprika if you like.

Cheesy Potato Casserole Recipe Variations

You can easily customize this potato casserole to suit your family’s tastes or what you have on hand. Try one of these simple twists:

Flavor Add-Ins:

• Loaded Potato Casserole: Stir in crispy bacon and sliced green onions for a flavorful twist.
• Savory Onion and Garlic: Add a few tablespoons of grated onion or a pinch of garlic powder for depth.

Cheese Swaps:

• Instead of sharp cheddar, try a blend of Gruyère, Colby Jack, or Pepper Jack for something a little different.
• Velveeta or American cheese make it extra creamy and melty for a crowd-friendly version.

Topping Ideas:

• Sprinkle the top with a Corn Flake and butter mixture before baking for a classic “funeral potatoes” touch.
• Or finish with a light coating of breadcrumbs or crushed crackers for a crispy, golden crust.

Potato Options:

• Use Yukon Golds or Russet potatoes instead of red for a softer, more mashed-style texture.
• In a hurry? Substitute thawed frozen hash browns and skip the boiling step; just adjust baking time slightly if needed.

Serving Suggestions

This easy potato casserole pairs beautifully with almost any main dish, especially cozy family dinners or holiday feasts. Try serving it with:

• Baked Ham with Brown Sugar Glaze
• Mississippi Pot Roast
• Dutch Oven Chicken
• Smothered Chicken
• Slow Cooker Pulled Pork
• Grilled Beef Tenderloin
• Cast Iron Filet Mignon

Preparation and Storage Tips

Make Ahead: Assemble the casserole as directed but don’t bake it. Cover tightly and refrigerate for up to 24 hours. Before baking, let it sit at room temperature for about an hour, then bake at 350°F for 25 minutes (add a few extra minutes if the center is still cold).

Storage: Keep leftovers in an airtight container in the refrigerator for 3-4 days.

Reheating: Warm individual portions in the microwave for 30-60 seconds, or reheat the whole dish covered at 350°F for 20-25 minutes until hot and creamy again.

** Freezing (not recommended): the sour cream can separate when thawed, resulting in an undesirable texture.

Other Holiday Potato Dishes

• Twice Baked Potatoes
• Scalloped Potatoes
• Sweet Potato Casserole with Marshmallows
• Sweet Potato Casserole with Pecans
• Cheesy Ham and Potato Casserole
• Hashbrown Casserole