Description
Creamy, rich, and beautifully golden on top, this Mouthwatering Mashed Potato Casserole is the ultimate comfort food side dish. Perfect for holidays, easy dinners, or make-ahead meal prep, this fluffy mashed potato bake is easy to customize and always a crowd-pleaser. Whether you’re looking for quick breakfast inspiration or hearty dinner ideas, this easy recipe hits the mark. It’s also one of those food ideas that keeps well and tastes even better the next day—definitely a keeper in your rotation of dinner ideas and healthy-ish snacks.
Ingredients
3 to 4 pounds Russet potatoes
4 tablespoons butter
1/2 cup whole milk (warmed)
1/2 cup sour cream
1 teaspoon salt
1/2 teaspoon black pepper
2 cloves garlic, minced (optional)
1 large egg (optional)
1 cup shredded cheese, divided (optional)
2 tablespoons chopped chives or green onions (optional)
Instructions
1. Peel and chop potatoes into even chunks. Place in cold salted water and bring to a boil. Cook until fork-tender (about 15–20 minutes).
2. Drain potatoes well and return to the pot to remove excess moisture.
3. Mash until smooth using a masher or ricer.
4. Mix in butter, warm milk, sour cream, salt, and pepper. Stir until creamy.
5. Add the egg if using and stir quickly to incorporate.
6. Fold in garlic, half the shredded cheese, and herbs if desired.
7. Transfer to a buttered baking dish. Smooth the top and create decorative swirls.
8. Top with remaining cheese if using.
9. Bake at 375°F (190°C) for 25–30 minutes until golden on top.
10. Rest for 10 minutes before serving. Garnish with chives or pepper.
Notes
Use warm milk and melted butter to maintain the mash’s heat and consistency.
For a more structured casserole, don’t skip the egg.
Want an ultra-crispy top? Broil for the final 2–3 minutes and watch closely.
- Prep Time: 25 minutes
- Cook Time: 30 minutes
- Category: Side Dish
- Method: Baked
- Cuisine: American
Nutrition
- Serving Size: 1/8 of casserole
- Calories: 290
- Sugar: 2g
- Sodium: 320mg
- Fat: 14g
- Saturated Fat: 9g
- Unsaturated Fat: 4g
- Trans Fat: 0g
- Carbohydrates: 35g
- Fiber: 3g
- Protein: 5g
- Cholesterol: 40mg