Name: Cheesy Sweet Potato Casserole
Ingredients: 4 pounds sweet potatoes (about 5-6 medium-sized): These are the heart and soul of the casserole. Look for potatoes with smooth, firm skin and a vibrant orange hue for the best flavor and color.; 1/2 cup (1 stick) unsalted butter, melted: This adds incredible richness and a luscious, velvety texture to the mashed sweet potato base.; 1/2 cup whole milk, warmed: Warmed milk incorporates more easily into the potatoes, ensuring a smooth, lump-free consistency without cooling down the mixture.; 1/4 cup sour cream: This is the secret ingredient for a subtle tang that cuts through the richness and balances the natural sweetness of the potatoes.; 1 teaspoon garlic powder: Provides a foundational savory, aromatic note that pairs beautifully with both the sweet potatoes and the cheese.; 1/2 teaspoon onion powder: Adds a layer of mild, sweet onion flavor that deepens the overall savory profile of the dish.; 1/2 teaspoon smoked paprika: Lends a gentle, smoky warmth that complements the cheese and gives the casserole a more complex flavor.; 1/4 teaspoon ground nutmeg: A classic pairing with sweet potatoes, nutmeg enhances their inherent sweetness and adds a touch of holiday spice.; 1 1/2 teaspoons kosher salt (or to taste): Essential for bringing out all the other flavors in the dish. Adjust based on your personal preference.; 1/2 teaspoon black pepper, freshly ground: Adds a mild, peppery bite that contrasts nicely with the creamy texture.; 2 cups sharp cheddar cheese, shredded and divided: Sharp cheddar provides a bold, tangy cheese flavor that stands up to the sweet potatoes. We’ll use most in the filling and save some for the top.; 1 cup mozzarella cheese, shredded and divided: Mozzarella brings that glorious, gooey melt and the coveted “cheese pull” that makes casseroles so irresistible.; 1 cup Panko breadcrumbs: These Japanese-style breadcrumbs are lighter and flakier than traditional breadcrumbs, guaranteeing a superiorly crispy, golden-brown topping.; 2 tablespoons unsalted butter, melted (for topping): Tossing the Panko breadcrumbs in melted butter is the key to achieving that perfectly even, crunchy, and golden crust during baking.; Fresh chives or parsley, chopped (for garnish): A sprinkle of fresh herbs at the end adds a pop of color and a fresh, bright flavor that cuts through the richness of the casserole.

Ingredients

Scale

4 pounds sweet potatoes (about 5–6 medium-sized): These are the heart and soul of the casserole. Look for potatoes with smooth, firm skin and a vibrant orange hue for the best flavor and color.
1/2 cup (1 stick) unsalted butter, melted: This adds incredible richness and a luscious, velvety texture to the mashed sweet potato base.
1/2 cup whole milk, warmed: Warmed milk incorporates more easily into the potatoes, ensuring a smooth, lump-free consistency without cooling down the mixture.
1/4 cup sour cream: This is the secret ingredient for a subtle tang that cuts through the richness and balances the natural sweetness of the potatoes.
1 teaspoon garlic powder: Provides a foundational savory, aromatic note that pairs beautifully with both the sweet potatoes and the cheese.
1/2 teaspoon onion powder: Adds a layer of mild, sweet onion flavor that deepens the overall savory profile of the dish.
1/2 teaspoon smoked paprika: Lends a gentle, smoky warmth that complements the cheese and gives the casserole a more complex flavor.
1/4 teaspoon ground nutmeg: A classic pairing with sweet potatoes, nutmeg enhances their inherent sweetness and adds a touch of holiday spice.
1 1/2 teaspoons kosher salt (or to taste): Essential for bringing out all the other flavors in the dish. Adjust based on your personal preference.
1/2 teaspoon black pepper, freshly ground: Adds a mild, peppery bite that contrasts nicely with the creamy texture.
2 cups sharp cheddar cheese, shredded and divided: Sharp cheddar provides a bold, tangy cheese flavor that stands up to the sweet potatoes. We’ll use most in the filling and save some for the top.
1 cup mozzarella cheese, shredded and divided: Mozzarella brings that glorious, gooey melt and the coveted “cheese pull” that makes casseroles so irresistible.
1 cup Panko breadcrumbs: These Japanese-style breadcrumbs are lighter and flakier than traditional breadcrumbs, guaranteeing a superiorly crispy, golden-brown topping.
2 tablespoons unsalted butter, melted (for topping): Tossing the Panko breadcrumbs in melted butter is the key to achieving that perfectly even, crunchy, and golden crust during baking.
Fresh chives or parsley, chopped (for garnish): A sprinkle of fresh herbs at the end adds a pop of color and a fresh, bright flavor that cuts through the richness of the casserole.

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Instructions

Prepare the Oven and Baking Dish: Begin by preheating your oven to 375°F (190°C). Grease a 9×13-inch baking dish or a similar 3-quart casserole dish with butter or non-stick spray. This crucial step prevents the casserole from sticking, ensuring that every last delicious scoop makes it onto a plate.
Cook the Sweet Potatoes: Wash and peel the sweet potatoes thoroughly. Cut them into uniform 1-inch cubes. Placing the cubed potatoes into a large pot or Dutch oven and add enough cold, salted water to cover them by about an inch. Bringing the water to a boil over high heat, then reduce the heat to a medium-high simmer. Cook for 15-20 minutes, or until the potatoes are very tender. You should be able to easily pierce them with a fork with no resistance. This ensures they will mash into a perfectly smooth and creamy puree.
Drain and Mash the Potatoes: Once fork-tender, carefully drain the sweet potatoes in a colander, letting them steam dry for a minute or two. This allows excess moisture to evaporate, preventing a watery casserole. Return the hot potatoes to the dry pot. Using a potato masher or a potato ricer, mash the potatoes until they are smooth. For the absolute creamiest texture, a potato ricer is highly recommended as it breaks down the fibers without making the potatoes gummy.
Create the Creamy Filling: To the pot of mashed sweet potatoes, add the 1/2 cup of melted butter, the warmed whole milk, and the sour cream. Stir until everything is well combined and the mixture is creamy. Now, add the seasonings: garlic powder, onion powder, smoked paprika, nutmeg, kosher salt, and black pepper. Stir vigorously to ensure the spices are evenly distributed throughout the base.
Incorporate the Cheese: It’s time for the cheesy magic. Add 1 1/2 cups of the shredded sharp cheddar and 3/4 cup of the shredded mozzarella to the sweet potato mixture. Reserve the remaining cheese for the topping. Fold the cheese into the potatoes until it’s just melted and incorporated. Be careful not to overmix at this stage. You want lovely pockets of gooey cheese throughout the casserole.
Assemble the Casserole: Spoon the cheesy sweet potato mixture into your prepared baking dish. Use a spatula or the back of a spoon to spread it into an even layer, smoothing the top.
Prepare the Crispy Topping: In a small bowl, combine the 1 cup of Panko breadcrumbs with the remaining 1/2 cup of sharp cheddar and 1/4 cup of mozzarella. Drizzle the 2 tablespoons of melted butter over the breadcrumb mixture and toss with a fork until the crumbs are evenly coated. This step is vital for a uniformly golden and crispy crust.
Top and Bake: Sprinkle the prepared Panko and cheese topping evenly over the surface of the sweet potato mixture in the baking dish, covering it from edge to edge. Place the casserole in the preheated oven.
Bake to Golden Perfection: Bake for 25-30 minutes, or until the casserole is heated through, the edges are bubbling, and the topping is a deep golden brown and crispy. If you want the top extra brown and crisp, you can switch the oven to the broil setting for the last 1-2 minutes, but watch it very carefully to prevent burning.
Rest and Garnish: Remove the casserole from the oven and let it rest on a wire rack for at least 10 minutes before serving. This important resting period allows the casserole to set, making it easier to scoop and serve. Just before serving, sprinkle with freshly chopped chives or parsley for a burst of color and fresh flavor.

Nutrition

Serving Size: one normal portion
Calories: 420