Delicious Do Ahead Mashed Potato Casserole

Make holiday dinners or weeknight gatherings effortless with this Delicious Do Ahead Mashed Potato Casserole—a creamy, cheesy, and perfectly seasoned side dish that can be prepared up to 24 hours in advance. Packed with the comforting flavors of buttery mashed russet potatoes blended with tangy cream cheese, sour cream, and a hint of garlic and onion powder, this recipe takes classic mashed potatoes to the next level. Topped with gooey melted cheddar and a golden-brown crust, it’s a crowd-pleaser that’s as indulgent as it is convenient. Simply pop it in the oven when you're ready, and enjoy a bubbling, flavorful casserole that pairs beautifully with any main course. Perfect for stress-free entertaining—this dish is sure to become a family favorite!

Nutriscore Rating: 65/100

Prep Time:30 mins

Cook Time:45 mins

Total Time:75 mins

Servings: 8

Ingredients

• 4 pounds russet potatoes
• 8 tablespoons butter
• 8 ounces cream cheese
• 1 cup sour cream
• 0.5 cup milk
• 1 teaspoon garlic powder
• 1 teaspoon onion powder
• 1.5 teaspoons salt
• 0.5 teaspoon black pepper
• 1.5 cups shredded cheddar cheese
• 2 tablespoons parsley (optional, for garnish)

Directions

Step 1

Peel and cube the russet potatoes. Place them in a large pot and cover with cold water. Bring to a boil over high heat, then reduce to a simmer and cook until the potatoes are fork-tender, about 15-20 minutes.

Step 2

Drain the potatoes and return them to the pot. Mash them using a potato masher or hand mixer until smooth.

Step 3

Add 6 tablespoons of butter, cream cheese, sour cream, milk, garlic powder, onion powder, salt, and pepper to the mashed potatoes. Mix until well combined and creamy.

Step 4

Grease a 9x13-inch casserole dish with 1 tablespoon of butter. Spread the mashed potato mixture evenly into the dish.

Step 5

Sprinkle the shredded cheddar cheese evenly over the top of the mashed potatoes.

Step 6

Cover the casserole dish tightly with aluminum foil and refrigerate if making ahead. This dish can be prepared up to 24 hours in advance.

Step 7

When ready to bake, preheat the oven to 375°F (190°C).

Step 8

Remove the foil from the casserole dish and dot the top of the cheese with the remaining 1 tablespoon of butter.

Step 9

Bake in the preheated oven for 35-40 minutes, or until the cheese is melted and the edges of the casserole are bubbling.

Step 10

Optional: Garnish with chopped parsley before serving for a fresh, vibrant touch.

Step 11

Serve hot and enjoy your creamy, cheesy mashed potato casserole!

Nutrition Facts

Serving size	(2521.7g)

Amount per serving	% Daily Value*
Calories	3932.8

Total Fat 218.8g	0%
Saturated Fat 129.0g	0%
Polyunsaturated Fat 6.3g
Cholesterol 618.2mg	0%
Sodium 5296.9mg	0%
Total Carbohydrate 437.3g	0%
Dietary Fiber 32.5g	0%
Total Sugars 51.5g
Protein 80.0g	0%

Vitamin D 71.6IU	0%
Calcium 997.7mg	0%
Iron 21.9mg	0%
Potassium 10745.2mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 48.8%

Protein: 7.9%

Carbs: 43.3%