4 Ingredient Hash Brown Casserole

This 4 ingredient hash brown casserole goes from freezer to oven with five minutes of prep. There is no need to thaw the potatoes or add condensed soup, sour cream or cheese. Simply layer frozen hash browns with butter, heavy cream and seasoning salt, then let the oven do the rest.

I keep this recipe intentionally pared down. The heavy cream and butter give the potatoes a tender, creamy consistency without turning them into a traditional cheesy hash brown casserole. It is made in one baking dish with no mixing bowl and almost no cleanup.

We first made this casserole to accompany our Valentine’s Day surf-and-turf dinner, but it quickly became a year-round side dish! It works just as well alongside dinner as it does with eggs, bacon or sausage for breakfast.

Why This Recipe Works

• You only need four ingredients. Frozen hash browns, butter, heavy cream and seasoning salt create a comforting potato casserole without a long grocery list.
• There is no thawing or mixing required. Everything is layered directly in the baking dish, keeping prep and cleanup to a minimum.
• It is creamy without soup or cheese. Heavy cream and butter keep the potatoes tender and rich while baking.
• It works for breakfast, dinner and holidays. Serve it with eggs and bacon, alongside ham or steak, or as part of a larger holiday meal.
• It is easy to scale for a crowd. A 9×13-inch pan provides plenty of servings with very little hands-on effort.

Recipe Ingredients

Frozen hash browns: Use shredded, diced or country-style frozen hash browns without thawing them first. Hash brown patties also work; arrange them in a single, slightly overlapping layer to cover the bottom of the dish.

Butter: Unsalted butter works best because the seasoning salt already contains plenty of sodium. You may reduce the butter to 1/4 cup, although the casserole will be slightly less rich.

Heavy whipping cream: Heavy cream gives the potatoes their tender, creamy consistency. Half-and-half can be substituted for a lighter result. Whole milk will also work, but the finished casserole will be thinner and less creamy.

Seasoning salt: Lawry’s Seasoned Salt is my go-to, but another seasoned salt blend can be substituted. If you are sensitive to salt, begin with less and add more when serving if needed.

How to Make 4 Ingredient Hash Brown Casserole

Recipe Notes

• To turn the casserole into a more substantial dish, add diced cooked ham, cooked ground turkey or sliced cooked breakfast sausage before baking.
• For a little extra flavor and heat, add one drained 4-ounce can of diced green chiles.
• For cheesy hash brown casserole, sprinkle shredded cheddar cheese over the potatoes during the final 15 minutes of baking. Leave the dish uncovered so the cheese can melt.
• For a more golden top, remove the foil after 45 minutes and bake uncovered for the remaining 15 minutes. The potatoes will still be creamy underneath rather than crisp throughout.
• For a crunchy topping, toss crushed cornflakes with a little melted butter. Sprinkle them over the casserole when you remove the foil, then bake uncovered for the final 15 minutes.
• Refrigerate leftovers in an airtight container within two hours of baking and enjoy them within 3 to 4 days.

What to Serve With 4 Ingredient Hash Brown Casserole

Hash brown casserole works equally well for breakfast, brunch or dinner. Serve it with eggs and bacon, fresh fruit, roasted vegetables, ham, steak or salmon.

See my complete roundup of ideas for what to serve with hash brown casserole to plan the rest of your meal.

Which Frozen Hash Browns Work Best

Shredded, diced or country-style frozen hash browns all work in this casserole. Use the potatoes directly from the freezer without thawing them first.

Hash brown patties may also be used. Arrange them in a single, slightly overlapping layer to cover the bottom of the baking dish.

Can Hash Brown Casserole Be Frozen?

This casserole can be frozen after baking, although the dairy may separate slightly and the potatoes may be softer after reheating.

Allow the casserole to cool completely, then transfer it to an airtight freezer-safe container or wrap the baking dish tightly. Freeze for up to 2 months.

Thaw it overnight in the refrigerator, then reheat it covered in a 350-degree F oven until heated through. Do not bring a cold glass baking dish directly from the refrigerator into a hot oven.

How to Reheat Hash Brown Casserole

Cover the casserole with foil and reheat it in a 350-degree F oven until warmed through. Keeping it covered helps prevent the potatoes from drying out.

For more detailed instructions, see my guide explaining how to reheat a casserole in the oven.

More Ways to Enjoy Hash Browns

• Add crispy hash browns and a fried egg to a burger for a hearty breakfast burger.
• Make a batch of air fryer shredded hash browns for a crispy breakfast side.
• Reheat leftover casserole in a skillet and serve it with sunny-side-up eggs.

More Easy Casserole Recipes

If you love comforting recipes that can feed the entire family, try one of these easy casseroles next:

• Minnesota tater tot hotdish combines ground beef, vegetables, a creamy sauce and crispy tater tots for a classic Midwestern dinner.
• Sweet potato casserole makes a comforting holiday side dish or an easy addition to a family meal.
• Runza casserole transforms the familiar ground beef and cabbage sandwich into an affordable, filling dinner.
• Loaded potato casserole is packed with cheese and savory baked-potato flavor, with plenty of room for your favorite toppings.
• Chicken broccoli rice casserole requires almost no prep and makes an easy dinner for busy weeknights.

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