Mashed Potato Casserole

Name: Mashed Potato Casserole
Cuisine: American
Ingredients: 4 large russet potatoes, peeled and cubed; 1/2 cup unsalted butter; 1 cup sour cream; 1/2 cup milk; 1 1/2 cups shredded cheddar cheese, divided; 2 cloves garlic, minced (optional); 1/2 teaspoon salt; 1/4 teaspoon black pepper; 1/4 cup chopped green onions (optional); 1/4 cup cooked, vege stripples (optional)

8 steps

Updated at: Tue, 04 Aug 2026 02:22:42 GMT

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Ingredients

6 servings

4russet potatoes

large, peeled and cubed

½ cupunsalted butter

1 cupsour cream

½ cupmilk

1 ½ cupsshredded cheddar cheese

divided

2 clovesgarlic

minced, optional

½ teaspoonsalt

¼ teaspoonblack pepper

¼ cupgreen onions

chopped, optional

¼ cupvege stripples

cooked, optional

Instructions

Step 1

Preheat the oven to 350°F (175°C) and lightly grease a 9×13 inch baking dish.

Step 2

Boil the potatoes: In a large pot, bring salted water to a boil. Add the cubed potatoes and cook for 15-20 minutes, or until tender. Drain and return the potatoes to the pot.

Step 3

Mash the potatoes: Add butter, sour cream, milk, garlic (if using), salt, and pepper to the potatoes. Mash until smooth and creamy, adjusting seasoning to taste.

Step 4

Mix in the cheese: Stir in 1 cup of shredded cheddar cheese until melted and well combined.

Step 5

Assemble the casserole: Spread the mashed potato mixture evenly into the prepared baking dish. Sprinkle the remaining 1/2 cup of cheddar cheese over the top.

Step 6

Add optional toppings: If using, sprinkle the crumbled stripples and chopped green onions over the cheese layer.

Step 7

Bake: Bake for 20-25 minutes, or until the cheese on top is melted and bubbly, with a slight golden brown color.

Step 8

Serve: Let the casserole cool slightly before serving. Garnish with extra green onions or parsley, if desired.