Ten minutes of prep, one pie plate, and you’ve got a breakfast casserole that feeds six to eight people. Hashbrowns, eggs, crumbled bacon, green onions, and cheddar cheese go in together. You bake it uncovered at 350° for 35–40 minutes. It can also be assembled the night before and baked in the morning — which is the version I actually use when people are coming over.
What Is This Recipe?
This is a hashbrown breakfast casserole — thawed frozen hashbrowns mixed with beaten eggs, milk, crumbled bacon, green onions, and cheddar cheese, poured into a 9-inch pie plate and baked until set. It cuts into wedges like a pie and serves a crowd without requiring you to cook anything to order.
The make-ahead option is what makes this recipe genuinely useful. Mix everything together the night before, refrigerate it covered, and bake it in the morning with an extra 10–15 minutes of cook time. It comes out of the oven exactly when everyone’s ready to eat, with no scrambling (pun intended) at the stove.
Why This Recipe Works
- Frozen hashbrowns add substance and make the casserole hearty enough to cut into proper slices — just thaw them first so the casserole sets properly
- Mixing the hashbrowns into the egg mixture means they hold together as the casserole bakes instead of separating
- Cheese inside and on top gives you flavor throughout plus a golden, melty top layer
- Baking uncovered lets the top brown and set correctly
- Works straight from the fridge if assembled the night before — just add a little extra bake time
Ingredient Breakdown
Eggs (5)
The base and binder. Don’t be tempted to use fewer — four eggs makes the casserole softer and harder to slice cleanly. Five is the number.
Milk (½ cup)
Lightens the egg mixture so the casserole isn’t too dense or rubbery. Whole milk gives the best result, but 2% works fine. I’ve tried it with skim once and it came out flat — not worth saving the calories.
Frozen Hashbrowns (3 cups, thawed)
The hearty filler that makes this casserole substantial. Thaw them completely before using — this is the step people skip when the casserole comes out wrong. Frozen hashbrowns release a lot of water as they cook, which prevents the egg mixture from setting and leaves you with a soggy center instead of a casserole that slices. Thaw overnight in the fridge or quickly in the microwave. Refrigerated shredded hash browns also work and skip the thawing step.
Green Onions (⅓ cup)
Add mild onion flavor without overpowering everything else. If you substitute diced white or yellow onion, use less — it’s significantly stronger than green onion.
Mild Cheddar Cheese (1½ cups)
One cup goes into the mix, half a cup goes on top. Sharp cheddar is what I’d actually reach for — more flavor for the same amount. Either way, shred it yourself if you can. Pre-shredded has an anti-caking coating that affects how it melts.
Bacon (8 slices) or Ham (1 cup diced)
Cook the bacon until it’s actually crispy — not just cooked through. It softens in the casserole, so if you start with limp bacon you end up with chewy pieces. Seven slices go into the mix, one goes on top as a garnish. The ham version is easier: no cooking required. I use ham when I’m assembling the night before and want less to do in the morning.
How to Make It: Step by Step
Step 1: Cook the bacon and mix the eggs. Cook and crumble the bacon until genuinely crispy. In a large bowl, whisk together the 5 eggs and ½ cup of milk — you’ll see it lighten in color as you whisk, which is what you want.
Step 2: Combine the filling. Add the thawed hashbrowns, green onions, salt, pepper, and 7 of the crumbled bacon slices to the egg mixture. Stir to combine — you want everything evenly distributed so you get bacon and onion in every bite, not all clumped in one spot.
Step 3: Add cheese. Stir in 1 cup of the cheddar cheese. The mixture will look thick and chunky at this point — that’s exactly right.
Step 4: Fill the pie plate and bake. Pour the mixture into a greased 9-inch pie plate — it’ll fill up close to the rim, which is fine. Top with the remaining ½ cup of cheese and the last crumbled bacon slice. Bake uncovered at 350° for 35–40 minutes. You’re looking for a golden top and a center that doesn’t jiggle when you gently shake the pan. Let it rest 5 minutes before cutting — it finishes setting as it cools and slices much cleaner.
Serving Suggestions
- Serve as the centerpiece of a brunch spread with fresh fruit and coffee
- Pairs well with toast, biscuits, or English muffins on the side
- Works as breakfast-for-dinner with orange juice and a simple salad
- Cut into smaller wedges as part of a bigger brunch spread alongside other dishes
Storage and Make-Ahead Tips
- Make-ahead (the night before): Mix everything together, pour into the pie plate, top with the remaining cheese and bacon, cover, and refrigerate. In the morning, pull it out while the oven preheats and bake with an extra 10–15 minutes of bake time since it’s going in cold
- Leftovers: Cover and refrigerate for up to 4 days
- Reheating: Microwave individual slices for 1–2 minutes; the oven at 325° for 10–12 minutes also works well and keeps the texture better
Why You’ll Love It
- About 10 minutes of prep
- Feeds 6–8 people from one pie plate
- Assembles the night before — just bake in the morning
- Bacon or ham — works either way
- Looks impressive on a brunch table — slices cleanly into wedges like a savory pie
- Great for company, holidays, or a regular weekend morning
Frequently Asked Questions
Can I make this the night before?
Yes — and it’s actually better that way. The hashbrowns absorb the egg mixture overnight and the whole thing bakes up more cohesive. Mix everything, pour into the pie plate, top with cheese and bacon, cover, and refrigerate. Bake in the morning with an extra 10–15 minutes since it’s starting cold.
Can I use ham instead of bacon?
Yes. Use 1 cup of diced ham in place of the 8 slices of bacon. No cooking required — just dice and add. I prefer the ham version when assembling the night before because there’s less to do in the morning.
Do the hashbrowns really need to be thawed first?
Yes, and this is the step most people skip when the casserole comes out wrong. Frozen hashbrowns release a lot of water during baking, which prevents the egg mixture from setting — you end up with a wet, soggy center instead of a casserole that slices cleanly. Thaw them in the fridge overnight or quickly in the microwave before using.
How do I know when it’s done?
The top should be golden and the center shouldn’t jiggle when you gently shake the pan. A toothpick inserted in the center should come out clean. Don’t pull it just because the timer goes off — go by the jiggle test, not the clock. If baking straight from the fridge, add 10–15 minutes.
Can I add vegetables?
Yes. Diced bell peppers and baby spinach work well mixed into the filling. Mushrooms work too — just cook them first. Raw mushrooms release a lot of water in the oven and will throw off how the casserole sets.
Variations and Substitutions
- Swap the meat: Breakfast sausage (cooked and crumbled) works great in place of bacon
- Spice it up: Use pepper jack instead of cheddar for a little heat
- Add vegetables: Diced bell peppers, mushrooms (pre-cooked), or baby spinach mixed into the filling
- Vegetarian: Skip the meat and double the vegetables
- Ham version: 1 cup diced ham instead of bacon — no cooking required
What to Do with Leftovers
- Reheat a slice for a quick weekday breakfast — holds up well for several days
- Wrap a cold slice in a flour tortilla with hot sauce for a portable breakfast burrito
- Chop into cubes and scramble with a couple of fresh eggs for a leftover remix
A Few Things Worth Having for This Recipe
Two things that make this casserole come out better:
A deep-dish pie plate. The standard 9-inch pie plate works, but the filling level can get close to the rim. A deep-dish version gives you a little breathing room and makes a thicker, more satisfying slice. Emile Henry ceramic pie dishes heat evenly and clean up easily — worth having for quiches, pot pies, and this casserole.
Good bacon. You taste it in every bite here since it’s mixed throughout and used as a topping. Thick-cut bacon from the butcher counter or a quality brand like Nueske’s Applewood Smoked makes a noticeable difference over the thin grocery store standard.
Lighter Version
Use 3 whole eggs plus 4 egg whites instead of 5 whole eggs to reduce fat. Swap regular cheddar for reduced-fat cheese and use turkey bacon or diced ham in place of regular bacon. Reduce total cheese to 1 cup. The casserole will be a little less rich but still very satisfying.
Nutrition Info
One slice (1/8 of the casserole) is approximately 220–280 calories with about 15g protein. Using ham instead of bacon reduces the fat content slightly. Full nutrition details are in the recipe card below.
A Note from Kate
This was one of the first recipes I made when I started having people over for brunch. It was a hit and it’s stayed in rotation ever since. The make-ahead option is the real selling point for me — I put it together Friday night, slide it in the oven Saturday morning while everyone is waking up and pouring coffee, and it’s ready when people are actually hungry. That’s exactly how a brunch recipe should work. No juggling pans, no timing stress.
Final Thoughts
If you need a crowd-feeding breakfast that doesn’t require you to stand at the stove, this is the one. Mix it up the night before, bake it in the morning, cut it into wedges. Bacon or ham — take your pick. Either way it comes together fast and disappears faster.
Related Recipes
- Biscuits and Gravy Casserole
- Breakfast Sausage Casserole
- Sausage Croissant Breakfast Casserole
- Easy Breakfast Casserole Recipe
- Easy Breakfast Pizza
Quick Breakfast Casserole Recipe
Ingredients
- Ingredients:
- 5 eggs
- 1/2 cup milk
- 3 cups frozen hashbrowns thawed
- 1/3 c. green onions sliced
- 1/2 tsp salt
- 1/8 tsp pepper
- 1 1/2 cups mild cheddar cheese
- 8 slices bacon (Or 1 cup diced ham)
Instructions
- Cook and crumble your bacon.
- Stir together eggs and milk.
- Combine the hashbrowns, green onions, salt, pepper and 7 slices cooked & crumbled bacon.
- Add one cup of the cheddar cheese.
- Pour egg and milk mixture over hashbrown mixture in a bowl and mix well.
- Pour into a 9 inch pie plate.
- Top with remaining 1/2 cup cheddar cheese and crumbled bacon.
- Bake at 350° for 35-40 minutes uncovered, or until casserole is set when you try and wiggle it and a toothpick comes out "clean"
- Let the breakfast casserole sit for 5 minutes or so to let it harden up a bit.
- Cut into wedges and serve - will serve 6-8 people.
- ** To make this the night before serving, mix all ingredients together, top with remaining cheese and bacon crumbles and set in fridge. Your hashbrowns will thaw in the egg mixture over night and it will be ready to bake in the morning. *** If you prepare this the night before you'll need to add time to your baking time. An extra 10-15 minutes should be good.
