Smashed Potato Breakfast Casserole starts with baby gold potatoes and my favorite sneaky move: a shake of Montreal steak seasoning. Yep, the stuff I pull out for dinner gets to clock in early!
Save me a corner piece of this fluffy egg and sausage casserole, I'm here for those crispy potato edges!
What makes this recipe irresistible
Everyone gets breakfast at the same time, including you! Slice the casserole right in the pan, set out a bottle of hot sauce, and grab a seat. You might even get to drink your coffee while it's still hot.
Smashed Potato Breakfast Casserole
Equipment
- 9x13-inch baking dish
- Large pot
- Large skillet
- Mixing bowl
- Potato masher or the bottom of a sturdy glass
Ingredients
- Crispy Smashed Potatoes
- 2 pounds baby Yukon Gold potatoes
- 1-2 tablespoons olive oil
- 2 teaspoons Montreal steak seasoning
- Breakfast Filling
- 1 pound breakfast sausage
- 8 large eggs
- 1 cup evaporated milk or whole milk
- 2 cups spinach roughly chopped
- 1 teaspoon Dijon mustard or ½ teaspoon dry mustard
- ½ teaspoon black pepper
- 2 cups shredded sharp cheddar cheese divided
- ½ cup shredded Monterey Jack cheese
- 3 green onions thinly sliced
- Optional garnishes: Chopped parsley, green onions, hot sauce
Instructions
- Preheat the oven to 425°F. Lightly grease a 9x13-inch baking dish.
- Place the potatoes in a large pot and cover with cold, salted water. Bring to a boil and cook until fork tender, about 18 to 20 minutes. Drain well.
- Spread the potatoes in the prepared baking dish in one even layer. Using the bottom of a glass or a potato masher, gently smash each potato to about ½-inch thick.
- Drizzle with olive oil and sprinkle evenly with the Montreal steak seasoning.
- Bake for 30 to 35 minutes, until the potatoes are golden brown and crispy.
- While the potatoes bake, cook the breakfast sausage in a large skillet over medium heat until browned, breaking it into crumbles. Stir in the chopped spinach and cook until just wilted. Drain any excess grease. Set aside to cool.
- In a large bowl, whisk together the eggs, milk, Dijon mustard, and black pepper. Stir in the cooked sausage and spinach, 1½ cups cheddar cheese, Monterey Jack cheese, and green onions.
- Reduce the oven temperature to 375°F.
- Pour the egg mixture evenly over the potatoes and sprinkle with the remaining ½ cup cheddar cheese.
- Bake for 25-28 minutes, or until the eggs are set and the center reaches 160°F.
- Let the casserole rest for 10 minutes before slicing and serving.
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Ingredients
Please refer to the printable recipe card for the exact measurements for this recipe.
Smashed potato breakfast casserole FAQs
Yes! Pick potatoes that are close in size so they finish boiling at about the same time. Baby reds hold together nicely when you press them flat.
You bet! Thaw it and squeeze out as much water as you can. Start with about ½ cup of thawed, squeezed spinach and stir it into the skillet after the sausage is browned. Frozen spinach packs down quite a bit, so a little goes a long way.
Turkey breakfast sausage works here, too. Look for the ground kind so you can crumble it into little bites that make their way to flavor every slice!
Deb's tip for crispier smashed potatoes
Give those potatoes a minute to let off some steam! After you drain them, leave them in the colander for a few minutes before smashing. That gives the skins a chance to dry so they can crisp up in the oven.
Want those crispy edges as a side dish? Try my Smashed Fingerling Potatoes. They get a drizzle of garlic and herbs before they go into the oven.
What to serve with smashed potato breakfast casserole
For brunch, set out a bowl of berries or slice up a few oranges. If this casserole is pulling dinner duty, serve it with my Green Salad with Fruit and its tangy vinaigrette. A little crunch and a splash of vinegar go so well with that cheesy casserole.
More savory breakfast casseroles
If potatoes are your favorite part of breakfast, try my Ham Hashbrown Breakfast Casserole. A bag of frozen hash browns gets you straight to the good stuff. And if the oven's already spoken for on Christmas morning, let the slow cooker handle my Crockpot Christmas Breakfast Casserole.
For another brunch bake with breakfast sausage, try my Biscuits and Gravy Casserole. The gravy sneaks into all those little biscuit nooks. Go ahead and grab a big spoon for that one!
Wrapping it up
The next time nobody can agree on dinner, put this casserole on the menu and call it breakfast for dinner. Pajamas optional, but highly encouraged! If you make it, leave a rating and tell me what you served with it in the comments.
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