Step-by-Step Instructions
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Prep the Oven: Preheat your oven to 375°F (190°C) and lightly grease an 8×8-inch baking dish or deep pie pan.
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Layer the Base: Spread half of your mashed potatoes evenly across the bottom of the prepared dish.
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Add the Filling: Flake or chop the canned corned beef and layer it generously over the potato base. Sprinkle half of the shredded cheddar directly over the meat layer.
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Top and Seal: Spread the remaining mashed potatoes over the top, smoothing the surface with a spatula or roughing it up with a fork to create peaks for extra crispiness.
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Bake to Golden Perfection: Sprinkle the remaining cheddar cheese on top. Bake uncovered for 25–30 minutes until the casserole is heated through, the cheese is melted, and the potato edges turn golden brown.
Texture & Flavor Breakdown









