Step 1: Prepare the Potatoes

1. Peel and Chop the Potatoes:

Begin by peeling the Yukon Gold potatoes and cutting them into evenly-sized cubes. Yukon Gold potatoes are preferred for this recipe because they’re naturally creamy and buttery, but you can also use russet potatoes for a lighter, fluffier texture.

2. Boil the Potatoes:

Place the cubed potatoes in a large pot and cover them with cold water. Add a generous pinch of salt to the water. Bring the water to a boil over medium-high heat, then reduce the heat to medium and simmer the potatoes for about 15-20 minutes, or until they are fork-tender.

3. Drain the Potatoes:

Once the potatoes are cooked through, drain them in a colander and return them to the pot. Allow the potatoes to steam for a minute or two to release any excess moisture.

Step 2: Whip the Potatoes

1. Add Cream and Butter:

While the potatoes are still hot, add the heavy cream, butter, and cream cheese to the pot. The heat from the potatoes will melt the butter and cream cheese, making them easier to incorporate.

2. Whip the Potatoes:

Using an electric mixer or a hand whisk, whip the potatoes until they are smooth and creamy. Start on low speed and gradually increase the speed as the potatoes become smoother. Be careful not to over-whip the potatoes, as this can make them gummy. You want them to be light and fluffy.

3. Add Sour Cream and Seasonings:

Stir in the sour cream, garlic powder, onion powder, salt, and pepper. Taste the potatoes and adjust the seasoning as needed. The sour cream adds a tangy richness to the potatoes, while the garlic and onion powders enhance their flavor.

Step 3: Assemble the Casserole

1. Transfer to a Baking Dish:

Spoon the whipped potato mixture into a lightly greased 9×13-inch baking dish, spreading it out evenly with a spatula. Use the back of the spatula to create decorative swirls or ridges on the surface of the potatoes—these will crisp up beautifully in the oven.

2. Add the Topping:

Drizzle the melted butter over the top of the whipped potatoes. Sprinkle the grated Parmesan evenly over the surface. For an extra crunchy topping, you can also sprinkle a handful of breadcrumbs on top.

Step 4: Bake the Casserole

1. Preheat the Oven:

Preheat your oven to 375°F (190°C).

2. Bake:

Bake the casserole in the preheated oven for 25-30 minutes, or until the top is golden brown and crispy. If you want an extra crispy top, turn on the broiler for the last 2-3 minutes of baking, but keep a close eye on it to prevent burning.

3. Cool Slightly:

Once the casserole is done, remove it from the oven and let it cool for about 5 minutes before serving. This allows the flavors to meld together and makes it easier to scoop.

Step 5: Garnish and Serve

Garnish the casserole with chopped fresh chives or parsley for a pop of color and freshness. Serve warm as a side dish for your favorite holiday meals or weeknight dinners.