My grandmother used to make this growing up during the summer months and it was always fork tender and filling. Just 3 simple ingredients from the pantry.

This oven baked 3-ingredient canned corned beef potato bake is the sort of humble supper that has fed families well for generations, especially when the garden was busy, the pantry was stocked, and nobody wanted to fuss over a long list of ingredients. It turns a few simple staples into something hearty, fork-tender, and deeply satisfying, with those crisp browned edges that always seem to disappear first. Recipes like this have a real old-fashioned thrift to them, the kind of practical Midwestern cooking grandmothers knew by heart.

Serve this bake with a simple side of buttered green beans, sliced tomatoes, or a cool cucumber salad to balance the richness. If you want to stretch the meal a bit further, a piece of toast, a dinner roll, or even a spoonful of applesauce on the side fits right in with its comforting, homespun flavor.

Oven Baked 3-Ingredient Canned Corned Beef Potato Bake

 

Finished corned beef potato bake with browned edges

Ingredients

2 cans corned beef, about 12 ounces each
4 large russet potatoes, peeled and thinly sliced
1 medium onion, thinly sliced 

Sliced potatoes, onions, and canned corned beef ingredients

Directions

1. Preheat the oven to 375°F and lightly grease a glass baking dish

 

Greased glass baking dish on a kitchen counter

2. Spread a layer of sliced potatoes in the bottom of the dish, then add a layer of sliced onion and a layer of corned beef broken into shreds. Repeat the layers until all the ingredients are used, finishing with potatoes on top.

Layered potatoes onions and shredded corned beef in baking dish

3. Cover the dish tightly with foil and bake for 1 hour.

 Foil-covered baking dish ready for the oven

4. Remove the foil and continue baking for 20 to 30 minutes more, until the potatoes are fork tender and the top is browned around the edges.

Baked corned beef potato casserole browned on top

5. Let the bake rest for 10 minutes before serving so the layers settle and scoop more neatly.

Variations & Tips

Add a little moisture: If your potatoes are especially starchy or sliced a bit thicker, add a few spoonfuls of water to the dish before covering and baking. That little bit of steam helps everything soften nicely.

Try a richer top: If you keep cheese on hand and do not mind going beyond three ingredients, a light sprinkle of shredded cheddar over the top during the last 10 minutes of baking makes a lovely browned crust.