Cheesy Smashed Potato Casserole is my favorite way to get crisp-edged potatoes and a creamy, cheesy center in one easy bake. It eats like a cross between smashed potatoes and a rich potato casserole, and I honestly prefer it to plain mashed potatoes most nights.
The flavor here is classic: sharp cheddar, a little garlic, sour cream tang, and that light smoky note from paprika. The potatoes stay soft in the middle, but you still get those browned bits around the edges that make the whole thing more interesting.
I make this when I want a holiday-style side dish that’s still simple enough for a regular dinner. It’s especially good next to roast chicken, steak, or anything off the grill.
Why You’ll Love This Recipe
Crisp edges: Smashing the potatoes gives you all those browned ridges and corners that stay a little crunchy under the cheese.
Extra creamy: The sour cream and milk mixture coats everything so you don’t end up with dry potatoes.
Melty cheese top: Cheddar for flavor, mozzarella for stretch, and you can take it as golden as you like under the broiler.
Easy to scale: It fits a 9×13 dish nicely for a group, and it’s simple to cut the recipe in half for a smaller dinner.
Make-ahead friendly: You can assemble it ahead and bake when you need it, which is a lifesaver on busy days.
Ingredients You’ll Need
Potatoes
- Baby yellow potatoes: These cook up creamy and smash easily without falling apart. Yukon gold or small red potatoes work too if that’s what you can find.
- Kosher salt: Salting the boiling water is the difference between potatoes that taste seasoned and potatoes that taste flat.
- Cooking spray or butter: I use spray when I’m in a hurry, but butter gives the edges a little more flavor and browning.
Creamy mash mix
- Unsalted butter: Melted butter makes it easy to mix in, and it helps the tops and edges brown.
- Sour cream: This is where the tangy, “loaded baked potato” flavor comes from. Greek yogurt works if you want it a little lighter.
- Whole milk or heavy cream: Use milk for a classic creamy texture, or cream if you want it richer. Either one helps the casserole stay soft instead of stiff.
- Garlic: Fresh minced garlic is best here. The jar kind works too, but I’d use a little less since it can be sharper.
- Kosher salt: Even with salty cheese, you still need a little seasoning in the creamy mix so the potatoes don’t taste bland.
- Black pepper: Just enough to cut through the richness. Fresh ground is nice if you have it.
- Smoked paprika: Adds a gentle smoky flavor that works really well with cheddar (and bacon if you’re using it).
- Chives or green onions: This gives it that classic baked potato finish. I like chives for a softer onion flavor.
Cheese and toppings
- Sharp cheddar cheese: This is the main flavor. I prefer shredding it myself because it melts smoother, but pre-shredded is fine.
- Mozzarella cheese: Mozzarella makes the top extra melty and stretchy. Part-skim or whole milk both work.
- Bacon: Totally optional, but it pushes the whole thing into “loaded potato” territory. Use cooked, crisp bacon so it stays a little crunchy.
- Parmesan: Optional, but I like a little on top for a saltier, nuttier bite and more browning.
- Parsley: Just for a fresh finish. Extra chives are great too.
Recipe Instructions
- Preheat the oven: Heat the oven to 400°F and grease a 9×13-inch baking dish with cooking spray or butter.
- Boil the potatoes: Add the potatoes to a large pot and cover with cold water. Salt the water, bring to a boil, then simmer until the potatoes are fork-tender, about 15 to 20 minutes.
- Drain the potatoes: Drain well, then let the potatoes sit in the colander for about 5 minutes so the steam can dry them out a bit.
- Smash the potatoes: Spread the potatoes in the baking dish and smash each one to about 1/2-inch thick.
- Mix the creamy mixture: Whisk the melted butter, sour cream, milk (or cream), garlic, salt, pepper, smoked paprika, and chives until smooth.
- Coat the potatoes: Spoon the creamy mixture over the smashed potatoes and gently toss and turn them in the dish so they’re well coated.
- Add the cheese: Sprinkle the cheddar and mozzarella evenly over the top. Add the bacon and Parmesan too, if using.
- Bake: Bake for 25 to 30 minutes, until bubbling and golden around the edges.
- Broil: Broil for 1 to 3 minutes if you want deeper browning on the cheese. Keep a close eye on it so it doesn’t scorch.
- Rest and serve: Let the casserole rest for about 5 minutes, garnish with parsley or extra chives, and serve hot.
Some of my tips!
This is the part that really makes a difference. If you only read one section, make it this one because this is where I share the little trick that helps the recipe turn out so well.
Recipe Tips & Tricks
Let the potatoes steam-dry. That short rest after draining really helps. Less water on the potatoes means creamier texture and better browning.
Don’t smash them too thin. About 1/2-inch thick is the sweet spot. If you go too thin, they can turn more like chips and dry out under the cheese.
Use freshly shredded cheddar if you can. It melts smoother and tastes better to me. Pre-shredded works, but it can sometimes bake up a little waxy.
Season the creamy mix confidently. Potatoes and dairy can handle a good amount of salt and pepper. If your cheeses are very salty, you can pull back slightly, but don’t skip seasoning.
Broil briefly at the end. One or two minutes can make the top look a lot better. Just stay right there and watch it.
Make some touches!
There are plenty of easy ways to serve this depending on the occasion. Keep it simple, or add a few small touches to make it feel a little more special.
Serving Suggestions
- Roast chicken: This is one of my go-to sides with a simple roast chicken or rotisserie chicken. Add a green vegetable and dinner is done.
- Steak or burgers: Serve it like you would baked potatoes, just casserole-style. It’s especially good with grilled steak or burgers.
- Green salad: A plain salad with a sharp vinaigrette is nice here. Something with cucumbers and tomatoes keeps it simple.
- Vegetables: Roasted broccoli, green beans, or asparagus are all good next to this. I like a little lemon on the veggies to keep the plate from feeling too heavy.
Save it for later
This section covers how to store leftovers and what parts of the recipe you can prepare ahead of time.
Storage and Make Ahead
Store leftovers covered in the fridge for up to 4 days. This holds up really well and slices neatly once it’s chilled.
Reheat individual portions in the microwave, or warm the whole dish in a 350°F oven until hot. If the top looks dry, a small splash of milk and a little extra cheese helps.
You can also make this recipe ahead by assembling it in the baking dish, covering it tightly, and refrigerating up to 24 hours. Bake until hot and bubbly, adding a few extra minutes if it’s going in cold.
If you want them to last longer, freeze individual portions in airtight containers. Thaw in the fridge overnight before reheating.
A few quick answers
This section covers a few extra details that may help before you head to the recipe card.
Recipe FAQs
Can I use Yukon gold or red potatoes instead of baby yellow potatoes?
Yes. Yukon golds are the closest swap and stay nice and creamy. Small red potatoes work too, and they hold their shape a little more when smashed.
Can I swap Greek yogurt for the sour cream?
You can. Plain Greek yogurt gives a similar tang, just a little lighter. I usually stick with full-fat yogurt so the casserole stays creamy.
How do I get the edges crispier?
Make sure the potatoes steam-dry after draining, and bake the casserole uncovered. I also like to broil at the end for a minute or two to crisp the top and deepen the browning.
Can I add heat?
Yes, this is good with sliced pickled jalapeños, a pinch of cayenne, or a few shakes of hot sauce mixed into the sour cream mixture. I’d start small and add more at the table.
How do I know it’s done?
The sauce should be bubbling around the edges and the cheese should look melted and lightly golden. If you assembled it ahead and baked it cold from the fridge, it may need a little extra time.
You might also like
Before you go, take a look at a few other recipes below the recipe card. They use similar ingredients in a different way and are worth saving too.
MORE DINNER RECIPES TO TRY
Cheesy Smashed Potato Casserole
INGREDIENTS
Potatoes
- 3 lb baby yellow potatoes
- 1 tbsp kosher salt for boiling water
- cooking spray or 1 tbsp butter for greasing.
Creamy mash mix
- 4 tbsp unsalted butter melted
- 1 cup sour cream
- 1 cup whole milk or heavy cream
- 3 cloves garlic minced
- 1 tsp kosher salt
- ½ tsp black pepper
- ½ tsp smoked paprika
- 2 tbsp chopped chives or green onions.
Cheese and toppings
- 2 cups shredded sharp cheddar cheese
- 1 cup shredded mozzarella cheese
- ½ cup cooked bacon crumbled optional
- ¼ cup grated Parmesan cheese optional
- fresh parsley for garnish.
INSTRUCTIONS
Boil and smash
- Heat oven to 400 F and grease a 9x13 inch baking dish; add potatoes to a large pot
- cover with cold water
- season water with salt
- bring to a boil then simmer until fork tender about 15 to 20 minutes; drain well and let steam dry 5 minutes
- then spread potatoes in the baking dish and smash each potato to about 0.5 inch thick.
Season and bake
- Whisk melted butter
- sour cream
- milk
- garlic
- salt
- pepper
- paprika
- and chives
- then spoon over smashed potatoes and gently toss to coat; sprinkle cheddar
- mozzarella
- and optional bacon and Parmesan evenly over the top; bake until bubbling and golden 25 to 30 minutes
- then broil 1 to 3 minutes for deeper browning if desired; rest 5 minutes
- garnish with parsley or extra chives
- and serve hot.
