Cheesy potatoes are a beloved comfort food classic that brings warmth and richness to any gathering. This recipe scales perfectly for 50 people, making it ideal for large family reunions, potlucks, or holiday parties. The creamy, cheesy layers combined with tender potatoes create a crowd-pleasing side dish that’s both satisfying and easy to prepare in bulk.
Ingredients
- 15 pounds of russet potatoes (about 50 medium-sized potatoes)
- 2 cups unsalted butter (4 sticks)
- 1 ½ cups all-purpose flour
- 12 cups whole milk (3 quarts), warmed
- 12 cups shredded sharp cheddar cheese (about 6 pounds)
- 6 cups shredded mozzarella cheese (about 3 pounds)
- 4 cups grated Parmesan cheese (about 1 pound)
- 4 teaspoons garlic powder
- 4 teaspoons onion powder
- 4 teaspoons salt, plus more to taste
- 2 teaspoons black pepper
- 1 ½ cups sour cream
- 1 ½ cups chopped green onions (optional, for garnish)
- Non-stick cooking spray or butter for greasing baking pans
Instructions
- Preheat the oven: Set your oven to 350°F (175°C). Prepare two large commercial-size baking trays or casserole dishes (at least 12×18 inches each) by greasing them thoroughly with butter or non-stick spray.
- Prepare the potatoes: Peel the russet potatoes and slice them thinly, about 1/8-inch thick, using a mandoline or a sharp knife. Place the sliced potatoes in a large bowl of cold water to remove excess starch and prevent browning.
- Make the cheese sauce (béchamel): In a very large heavy-bottomed pot or stockpot, melt the butter over medium heat. Once melted, whisk in the flour to create a roux. Cook, whisking constantly, for about 2-3 minutes to eliminate the raw flour taste but do not let it brown.
- Add milk: Gradually whisk in the warmed milk, a little at a time, to prevent lumps. Continue whisking until the mixture thickens and coats the back of a spoon, about 8-10 minutes.
- Incorporate seasonings and cheese: Remove the pot from heat and stir in garlic powder, onion powder, salt, and pepper. Add the shredded cheddar, mozzarella, and half of the Parmesan cheese. Stir until the cheese is fully melted and the sauce is smooth. Finally, fold in the sour cream to add creaminess.
- Drain potatoes: Drain the sliced potatoes thoroughly and pat them dry with clean kitchen towels or paper towels to avoid excess water diluting the sauce.
- Assemble the dish: Working quickly, layer half the potatoes evenly in the prepared pans. Pour half of the cheese sauce over the potatoes, spreading it evenly. Repeat with the remaining potatoes and cheese sauce, finishing with a sprinkle of the remaining Parmesan cheese on top.
- Bake: Cover the pans tightly with aluminum foil and bake in the preheated oven for 1 hour. After 1 hour, remove the foil and bake uncovered for an additional 30-40 minutes, or until the potatoes are tender when pierced with a fork and the top is golden and bubbly.
- Rest and garnish: Let the cheesy potatoes rest for 10-15 minutes before serving to allow the sauce to thicken. Sprinkle chopped green onions on top if desired.
Tips
- Potato choice: Russet potatoes are ideal because they absorb the sauce well and become tender without falling apart. Yukon Golds can be used for a creamier texture but may require slightly less cooking time.
- Make ahead: You can assemble the dish a day in advance, cover tightly, and refrigerate. Add 10-15 minutes to the baking time if baking from cold.
- Cheese substitutions: For a different flavor, swap mozzarella with Monterey Jack or Colby cheese. Avoid pre-shredded cheese if possible, as it contains anti-caking agents that can affect melt quality.
- Common mistake: Don’t skip drying the potatoes after rinsing; excess water dilutes the sauce and makes the dish watery.
Serving Suggestions
Cheesy potatoes are a versatile side that pairs wonderfully with hearty main dishes like roast beef, baked ham, fried chicken, or grilled pork chops. For a balanced meal, serve alongside steamed green vegetables, such as broccoli or green beans, and a fresh salad. They also work well at brunch buffets or as part of a holiday spread with cranberry sauce and dinner rolls.
Variations
To add variety or suit different dietary preferences, try these variations:
- Loaded Cheesy Potatoes: Stir in cooked and crumbled bacon, diced green chilies, or sautéed mushrooms for extra flavor and texture.
- Spicy Kick: Add 1-2 teaspoons of smoked paprika or cayenne pepper to the cheese sauce for a subtle heat.
- Vegetarian: Use vegetable broth instead of milk for a lighter, dairy-based sauce or add finely chopped spinach or kale between layers.
- Gluten-Free: Substitute the all-purpose flour with a gluten-free flour blend or cornstarch (about 1/2 cup cornstarch) to thicken the sauce.
Storage and Reheating
Store leftover cheesy potatoes in airtight containers in the refrigerator for up to 4 days. To reheat, place portions in an oven-safe dish, cover with foil, and warm at 325°F (160°C) for 20-30 minutes until heated through. Avoid microwaving large portions, as the texture may become gummy. Leftovers can also be frozen for up to 2 months; thaw overnight in the refrigerator before reheating using the oven method.
Frequently Asked Questions
Can I prepare cheesy potatoes entirely in advance?
Yes, you can assemble the dish a day ahead and refrigerate it covered. Baking time may increase by 10-15 minutes when starting from cold. This makes it a convenient option for busy event days.
What’s the best way to slice potatoes for this recipe?
Using a mandoline slicer ensures uniform thin slices, which cook evenly. Aim for about 1/8-inch thickness. If slicing by hand, try to keep slices consistent to avoid uneven cooking.
Can I use shredded cheese blends instead of separate cheeses?
While pre-shredded cheese blends are convenient, they often contain anti-caking agents that can affect melt quality. For the best creamy texture, shred cheese yourself from blocks when possible.
How do I prevent the cheesy potatoes from becoming watery?
Key steps are drying the potato slices thoroughly after rinsing and not overloading the sauce with liquid. Using whole milk and proper thickening with the roux helps maintain a rich, creamy consistency.
Is it necessary to use multiple types of cheese?
Using a blend of cheeses like sharp cheddar, mozzarella, and Parmesan balances flavor and texture—cheddar provides tang, mozzarella adds meltiness, and Parmesan contributes nuttiness. However, you can adjust based on preference or availability.
Can this recipe be adapted for smaller or larger groups?
Absolutely. Scale ingredients proportionally based on the number of servings needed. For very large batches, consider using multiple pans and adjusting baking times slightly to ensure even cooking.
What if I don’t have sour cream?
Sour cream adds tang and creaminess but can be substituted with Greek yogurt or cream cheese. These alternatives will slightly change the flavor but maintain the creamy texture.
Are there any safety concerns when preparing large batches?
Ensure potatoes are cooked to tenderness and the internal temperature of the dish reaches at least 165°F (74°C) when reheating leftovers. Cool leftovers quickly and refrigerate within two hours to prevent bacterial growth.
Following this recipe will ensure you have a delicious, cheesy potato dish that satisfies a large crowd with ease. The balance of creamy sauce and tender potatoes, combined with rich cheese flavors, makes it a guaranteed hit for any event.
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