Cheesy Baked Potato Casserole with Ham

Craving a cozy, comforting meal that brings everyone to the table? This baked potato casserole with ham is the ultimate comfort food, featuring tender potatoes, savory diced ham, and a velvety béchamel sauce topped with a mountain of gooey, melted mozzarella. It is incredibly easy to assemble and bakes to golden, bubbling perfection every single time.

There is nothing quite like a warm, bubbling casserole fresh from the oven to make any evening feel special. This recipe elevates simple ingredients into a luxurious family dinner. The combination of tender parboiled potatoes and savory ham provides a hearty base, while the velvety béchamel sauce adds a rich, creamy texture that binds everything together.

Topped with a generous layer of mozzarella cheese that melts and blisters beautifully, this dish is a guaranteed crowd-pleaser that will have everyone reaching for seconds. It is perfect for using up leftover holiday ham or simply satisfying a craving for something warm and cheesy.

Ingredients

Why this recipe works

Parboiling the potatoes before baking is a crucial step that ensures they cook evenly and achieve the perfect tender texture. If you bake raw potatoes in a cream sauce, they often remain hard in the center or take hours to cook through, which can cause the sauce to split or curdle.

By boiling them for just a few minutes first, you release some of their starches, allowing them to absorb the velvety béchamel without becoming mushy. This method guarantees a uniform, melt-in-your-mouth consistency throughout the entire casserole.

Using a velvety béchamel sauce instead of heavy cream or canned soups provides a superior, silky texture that beautifully coats every ingredient. The sauce thickens and stabilizes under the oven's high heat, preventing the casserole from turning greasy or watery.

As the casserole bakes, the starch from the potatoes combines with the béchamel, creating an incredibly rich and cohesive sauce that perfectly balances the savory notes of the diced ham and the gooey mozzarella topper.

Notes and substitutions

For the best results, choose starchy potatoes like Russets or all-purpose Yukon Golds, as they hold their shape well while absorbing the creamy sauce. When it comes to the ham, pre-diced store-bought ham works beautifully for convenience, but leftover baked ham sliced into bite-sized cubes adds an extra layer of rustic flavor.

Avoid using extremely wet or watery ham, as excess moisture can thin out the béchamel sauce during baking. Always shred your own mozzarella cheese from a block if possible, as pre-shredded varieties contain anti-caking agents that prevent a smooth melt.

If you need to adapt this recipe, you can easily substitute the mozzarella with other melting cheeses like sharp white cheddar, Gruyère, or Monterey Jack for a different flavor profile. For a gluten-free version, use a gluten-free béchamel sauce. A standard glass or ceramic 9x13-inch baking dish is ideal for this recipe because it heats evenly and allows you to monitor the bubbling edges as the casserole bakes to perfection.

• shredded mozzarella cheese: shredded sharp cheddar, Monterey Jack, or Gruyère cheese
• béchamel sauce: a gluten-free white sauce or a rich cheese sauce

Equipment

• 9x13-inch glass baking dish
• Large pot
• Spatula