Make Ahead Breakfast Casserole with Hash Brown Perfect for A Crowd

How to make breakfast casserole step by step

• 1 lb bulk sage pork sausage ( adds flavor and richness )
• 1 cup green bell pepper, chopped ( add sweetness, color, and texture._
• 1 cup red bell pepper, chopped
• 10 eggs
• 2 cups whole milk
• ¼ tsp ground black pepper
• ½ tsp garlic powder
• ½ tsp salt
• 3 cups frozen country style hash browns
• 1 cup French’s crispy fried onions
• 8 oz cheddar cheese
• hot sauce, optional

1) Brown the sausage and soften the peppers

• Heat the skillet over medium heat.

• You don’t need to add in any oil if you’re using a nonstick pan.

• Add sausage and cook them until browned and crumbly.

• Next add in chopped red and green bell peppers and cook them until softened.

• Drain off excess fat from the sausage if you like, I don’t bt you can if you don’t want a greasy casserole.

2) Whisk the egg mixture

• In a large bowl, whisk together: Eggs + Whole milk + Salt, and black pepper, garlic powder.
• Whisk the egg mixture until smooth and the seasoning has spreads evenly.

3) Layer the casserole

In a greased 9×13 dish:

• Spray cooking oil onto the casserole dish.
• Spread the frozen hash browns in an even layer.

• Next add in the sausage and pepper mixture over the potatoes.

• Sprinkle cheddar cheese over the top.

• Add your mix ins such as crispy onions based on your crunch preference.

• Repat the process, you can have as many layers as you like but with this recipe, you get about 2 layers.

• Pour the egg mixture evenly over everything, so it settles into the layers.

• Optional but add in a splash of hot sauce if you want a spicy kick.

• Tap the dish gently on the counter, it helps the eggs move into the gaps.

4) Chill overnight

• Cover with cling film tightly and refrigerate overnight.

• This helps flavors meld and also makes for an easy bake in the morning.

5) Bake until set

• Take the casserole atleast 30 minutes before baking so it comes to room temperature. You NEVER want to take a cold casserole directly from fridge to baking.

• Preheat oven to 350°F.

• Bake for about 40 minutes, until the center is fully set.

• If you fins that the top is browning too fast you can cover loosely with foil for the last part of baking.

6) Rest, slice, serve

• After 40 mins, i use a knife taste to make sure its done before taking it out of oven.
• If knife has some liquid on it, cover the dish with a foil and allow it to bake some more, atleast 10 minutes.
• Once done, remove from oven
• It will look puffy out of oven but allow it cool and it will flatten.

• Rest 15 to 30 minutes before slicing,

• Allowing casserole to cool so that it to comes together and also gives much cleaner cuts.

Not sure its done? Here’s how to check your breakfast casserole

Visual cues that work every time

• The casserole should look set in the center ( not shiny or wet ).

• The edges of the casserole will look slightly puffed and may pull away from the pan.

• The top of the casserole should be golden even with melted cheese, not pale.

The knife test

• Still not sure, just insert a butter knife into the center.

• If liquid egg pools in the cut, its not yet done, bake it for longer.

• If the knife comes out mostly clean with just melted cheese, you are close. allow it to cook through as it sets

Use a thermometer for best practice,

Egg dishes should always reach a safe temperature before serving. USDA guidance lists 160°F for egg dishes, and mixed casseroles are often targeted at 165°F for safety.

Aim the thermometer at the center, it should hit at least 160°F, and closer to 165°F if you want a firmer set.

If it is browning before it is set

• Don’t worry, this is common when the casserole goes into the oven very cold from the fridge.

• Cover your breakfast casserole loosely with foil, then keep baking until the center reaches the right temperature.

Rest time matters

• Rest 15 to 30 minutes before slicing.

• This allows the center to firm up so the slices hold together better.

Breakfast Casserole flavor variation ideas

Classic crowd pleasers

Bacon cheddar

• Swap sausage for cooked chopped bacon.
• Keep peppers, or swap in green onions for a simpler flavor.
• Cheddar still works best here.

Ham and Swiss

• Use diced ham, skip peppers if you want a milder casserole.
• Add sautéed onions for sweetness.
• Swiss or Gruyère cheese gives it a brunch style feel.

All sausage, no peppers

• Great for picky eaters.

• Add a pinch more garlic powder and black pepper so it still tastes bold.

Southwest style (for those who want a little pit of a spicy kick)

• Use pepper jack or a cheddar pepper jack blend.

• Add diced jalapeños or green chiles.

• Serve with salsa, avocado, and extra hot sauce.

Healthy veggie packed options (still hearty)

Mushroom spinach

• Sauté mushrooms until they release moisture, then add spinach to wilt.

• Gruyère or cheddar works well.

Broccoli cheddar

• Use small broccoli florets, steam or sauté briefly first so they do not stay crunchy.

• Cheddar is a natural match

Crunch topping options

• Crispiest topping: add crispy fried onions for the last 5 minutes of baking, so they stay crunchy.

• Serve on the side: a great option as it lets everyone top their slice.