Cheesy Mashed Potato Casserole
Indulge in pure comfort with this irresistible Cheesy Mashed Potato Casserole, the ultimate side dish that's perfect for family dinners, potlucks, or holiday gatherings. Creamy mashed russet potatoes are elevated with the rich flavors of butter, sour cream, and whole milk, blended with savory seasonings like garlic and onion powder, and generously layered with melty cheddar cheese. Baked to golden perfection with a crispy, bubbly top, this casserole strikes the perfect balance between creamy and cheesy. Optional Parmesan adds a touch of elegance, while fresh green onions provide a pop of color and brightness. Easy to prepare ahead of time and big on flavor, this casserole will quickly become your go-to dish for crowd-pleasing comfort food. Serve it warm and watch it disappear!
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Recipe Information
Ingredients
- 5 large russet potatoes
- 4 tablespoons unsalted butter
- 1 cup whole milk
- 1 cup sour cream
- 2 cups shredded cheddar cheese
- 1 teaspoon garlic powder
- 1 teaspoon onion powder
- 1 teaspoon salt
- 0.5 teaspoon black pepper
- 2 stalks green onions (optional, for garnish)
- 0.5 cup parmesan cheese (optional)
Instructions
Preheat your oven to 375°F (190°C) and grease a 9x13 inch baking dish with butter or non-stick cooking spray.
Peel and quarter the russet potatoes. Place them in a large pot and cover with cold water. Add a pinch of salt to the water.
Bring the pot to a boil over medium-high heat and cook the potatoes until they are fork-tender, about 15-20 minutes.
Drain the boiled potatoes and return them to the pot over low heat for a minute to evaporate any excess moisture.
Mash the potatoes using a potato masher or hand mixer until smooth and lump-free.
Add the butter, milk, sour cream, garlic powder, onion powder, salt, and black pepper to the mashed potatoes. Mix until creamy and well combined.
Stir in 1.5 cups of the shredded cheddar cheese until evenly distributed.
Spread the mashed potato mixture evenly into the prepared baking dish.
Top with the remaining 0.5 cup of shredded cheddar cheese, and sprinkle the parmesan cheese on top if using.
Bake in the preheated oven for 25-30 minutes, or until the cheese is melted, bubbly, and lightly golden on top.
Remove the casserole from the oven and let it rest for 5 minutes before serving.
Garnish with chopped green onions if desired, and serve warm.
Nutrition Facts
Calories |
589 | ||
|---|---|---|---|
% Daily Value* |
|||
| Total Fat | 31.5 g | 40% | |
| Saturated Fat | 20.5 g | 102% | |
| Polyunsaturated Fat | 0.0 g | ||
| Cholesterol | 93 mg | 31% | |
| Sodium | 776 mg | 34% | |
| Total Carbohydrate | 58.0 g | 21% | |
| Dietary Fiber | 3.8 g | 14% | |
| Total Sugars | 7.2 g | ||
| Protein | 22.0 g | 44% | |
| Vitamin D | 0.7 mcg | 4% | |
| Calcium | 516 mg | 40% | |
| Iron | 1.9 mg | 11% | |
| Potassium | 1312 mg | 28% | |
*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.
