Cheesy Ham Potato Casserole with a Golden Crust Step-by-step instructions

Before you start

Before you begin cooking, gather all of your ingredients and equipment to ensure a smooth process. Peel and dice the potatoes into uniform half-inch cubes, and dice the cooked ham if it is not pre-cut.

Ensure your creamy sauce is ready to use, whether store-bought or prepared ahead of time. Shred the cheddar cheese from the block and divide it into two equal portions. Having these components ready will make assembling the casserole quick and effortless.

Instructions

Prep and Mix

1. 1Preheat the Oven and Prepare the Dish
   Preheat the oven to 375°F (190°C). Lightly grease a 9x13-inch glass baking dish to prevent the potatoes from sticking during baking.
   Look for The oven should be fully preheated before the casserole is placed inside.
   Tip Using a glass dish allows you to easily monitor the browning on the bottom and sides.
2. 2Combine the Fillings and Sauce
   In a large mixing bowl, combine the peeled and diced potatoes, diced cooked ham, creamy sauce, and 1 cup of the shredded cheddar cheese. Use a rubber spatula to gently fold the ingredients together until every potato cube is evenly coated in the sauce.
   Look for The potatoes and ham should be completely coated and evenly distributed throughout the mixture.
   Tip Cut the potatoes into uniform cubes so they all cook at the same rate.

By the end of this initial phase, the ingredients should be thoroughly combined in the bowl. Once you fold the potatoes, ham, and the first portion of cheddar cheese into the creamy sauce, every single piece should be evenly coated. The mixture will look rich and well-distributed, indicating that the flavors are properly balanced before the casserole is transferred to the baking dish.

Assemble and Bake

3. 3Transfer and Bake the Casserole
   Spread the potato and ham mixture evenly into the prepared glass baking dish, smoothing the top with your spatula. Cover the dish tightly with aluminum foil and bake in the preheated oven for 35 minutes.
   Look for The casserole should be hot and starting to bubble around the edges.
   Tip Covering with foil locks in the steam, helping the potatoes cook through without drying out.

After baking covered for thirty-five minutes, the casserole will be hot, and you should see gentle bubbling around the edges of the glass dish. The potatoes should be tender when pierced with a fork, though they will still hold their shape. The aroma of savory ham and warm cream will fill your kitchen, signaling that the ingredients have successfully fused together and are ready for the final cheese topping.

Top and Brown

4. 4Top with Cheese and Brown
   Carefully remove the aluminum foil and sprinkle the remaining 1 cup of shredded cheddar cheese evenly over the top of the casserole. Return the dish to the oven, uncovered, and bake for an additional 10 minutes.
   Look for The cheese should be completely melted, bubbling, and golden brown around the edges.
   Tip For an extra crispy crust, you can broil the casserole on high for the last 1 to 2 minutes, watching closely to prevent burning.
5. 5Rest Before Serving
   Remove the casserole from the oven and place it on a wire rack. Let the dish rest for 10 minutes at room temperature before scooping and serving.
   Look for The creamy sauce will set slightly as it cools, making it easier to serve clean scoops.
   Tip Letting the casserole rest prevents the creamy sauce from being too runny when served.

At the conclusion of the baking process, the top of the casserole will feature a beautiful, deeply golden-brown crust of melted cheddar cheese.

It will be bubbling vigorously around the edges of the dish, and the steam rising from the center will carry a rich, smoky, and cheesy aroma. Let the dish rest for ten minutes; as it cools slightly, the bubbling will subside and the sauce will set to a perfect serving consistency.

Common mistakes

One common mistake is cutting the potatoes into uneven sizes, which leads to some pieces being undercooked and crunchy while others are mushy. Ensure your potato cubes are uniform in size.

Another error is using pre-shredded cheese, which contains starch that prevents a smooth melt, resulting in a greasy or grainy topping. Finally, do not skip the resting period after baking; cutting into the casserole immediately will cause the creamy sauce to run, making the servings messy.

How to tell it’s done

You can tell this casserole is perfectly done when the cheddar cheese topping is completely melted, bubbling, and has turned a lovely golden-brown color.

To check the potatoes, insert a sharp knife or fork into the center of the dish; it should slide easily through the potato cubes without any resistance. The entire casserole should be piping hot throughout, reaching an internal temperature of at least 165°F (74°C) before serving.