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Dinner · Part 2 of 3: Instructions

Cheesy Ham Potato Casserole for Easy Comfort Step-by-step instructions

A close-up of a cheesy ham and potato casserole in a glass dish with a metal spatula lifting a portion.
Prep
Cook
Total
Serves
6
Includes 10 min resting

Before you start

Before you begin, ensure your oven is preheated to 375 degrees Fahrenheit. Wash, peel, and dice your potatoes into uniform half-inch cubes. Having the potatoes cut to a consistent size is essential for even cooking. Dice your ham into pieces roughly the same size as your potatoes.

Gather all your measured ingredients, including the shredded cheese, and have your 9x13 inch baking dish ready on your workspace. Clearing your area beforehand makes the assembly process much smoother and allows you to focus on getting the layers right, which ensures the best possible texture once the casserole comes out of the oven.

Ingredients at a glance (3)
  • 2 lb diced potatoes
  • 1 lb diced ham
  • 2 cups shredded cheddar cheese

Instructions

Combining the base

  1. Combine Base Ingredients
    In a large mixing bowl, combine the diced potatoes, diced ham, and half of the shredded cheddar cheese. Toss the mixture gently until the ingredients are evenly distributed throughout the bowl.
    Look for The mixture should look well combined with the ham and cheese evenly coating the potato pieces.
    Tip Ensure the potatoes are cut into uniform, small cubes so they cook through at the same speed.

The mixture should look well combined, with the ham and cheese evenly distributed among the potato pieces. The bowl should be large enough to allow for thorough mixing without spilling ingredients.

Ensure that the cheese is not clumped together so that it melts consistently throughout the casserole. Once everything is mixed, you are ready to transfer it to the baking dish for the next stage of assembly.

Assembling the casserole

  1. Assemble the Casserole
    Transfer the potato and ham mixture into a 9x13 inch glass baking dish, spreading it out into an even layer. Ensure the ingredients are distributed evenly to facilitate uniform cooking throughout the dish.
    Look for The mixture should be spread in a relatively even layer across the bottom of the baking dish.
    Tip Distribute the mixture evenly across all corners of the dish to ensure every potato piece cooks properly.

The casserole should be spread out evenly in the baking dish. The dish is now ready for the oven. Double-check that the ingredients are spread evenly to ensure the heat penetrates the center of the dish effectively during the baking period. This preparation step is vital for achieving the perfect tenderness in the potatoes and the ideal melt on the cheese.

Baking until golden

  1. Bake and Serve
    Bake the casserole at 375 degrees Fahrenheit for 45 minutes. Remove the dish from the oven, add the remaining shredded cheddar cheese on top, and return to the oven until the cheese is bubbling and golden.
    Look for The cheese should be melted and bubbling, and the potatoes should be tender when pierced with a fork.
    Tip Let the casserole rest for 10 minutes after removing it from the oven to allow the dish to settle.

The casserole should be bubbling vigorously, and the cheese on top should be melted and lightly browned. The potatoes should be tender and the mixture should have settled into a cohesive consistency. The aroma should be savory and inviting. If everything looks golden and tender, it is ready to be removed from the oven and set aside to rest before being served to your guests.

Common mistakes

A common mistake is cutting the potato cubes too large, which prevents them from cooking through at the same rate as the ham and cheese. Another issue is overcrowding the dish, which can lead to uneven cooking; ensure the mixture is spread in a relatively even layer.

Do not skip the resting time, as the dish needs a few minutes to settle after coming out of the oven. If you slice into it too soon, the texture may appear less cohesive.

How to tell it’s done

The casserole is done when the potatoes are completely tender and can be easily pierced with a fork with no resistance. The cheese topping should be golden brown and bubbling along the edges of the dish.

Because this dish uses pre-cooked ham, there is no internal temperature requirement for the protein, but the casserole itself should be piping hot throughout. If the cheese is not browning enough, you can place it under the broiler for one to two minutes, but keep a close eye on it to prevent burning.

Coming up in Part 3: common questions

  • Can this be made ahead of time?
  • What is the best type of potato for this recipe?
  • Why is it important to let the casserole rest?

Also in Part 3: variations (Spicy Ham and Potato, Vegetable-Packed Casserole), storage and make-ahead, and the printable recipe card.

Up next · Part 3 of 3

2 variations · storage & make-ahead · 3 answers · printable card

Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)