Ultimate Breakfast Casserole: Make-Ahead Morning Magic

Breakfast casserole in white baking dish golden brown bubbling cheese sausage vegetables portion removed showing layers morning light

Ultimate Breakfast Casserole: Make-Ahead Morning Magic

A hearty, cheesy, and comforting breakfast bake loaded with sausage, eggs, hash browns, and gooey melted cheese. Perfect for weekends, holidays, or any morning when you want to serve up a warm, crowd-pleasing meal with minimal effort. Prepare it the night before and simply bake in the morning for a stress-free breakfast.

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Prep Time 20

Cook Time 45

Chill Overnight (Optional) 8

Total Time 1 5

Servings: 8 people

Course: Breakfast, Brunch, Main Dish

Cuisine: American, Comfort Food

Calories: 380

Ingredients Equipment Method Notes

Ingredients

Main Ingredients

1 lb breakfast sausage pork or turkey, browned and drained
6 cups frozen hash browns thawed
1 cup shredded cheddar cheese
0.5 cup shredded mozzarella cheese
0.5 cup diced onion
0.5 cup diced red bell pepper
8 large eggs
1.5 cups milk
0.5 tsp salt
0.25 tsp black pepper
0.25 tsp garlic powder
0.25 tsp paprika

Optional Add-ins

sliced green onions
chopped spinach
cooked bacon or ham
jalapeños or hot sauce for spice lovers

Equipment

9×13-inch baking dish
Large Skillet
Mixing Bowls
Whisk
Rubber Spatula
Aluminum foil

Method

Preheat oven to 350°F (175°C). Lightly grease a 9x13 inch baking dish.
In a large skillet, cook sausage over medium heat until browned. Drain excess grease and set aside to cool slightly.
In a large bowl, combine thawed hash browns, sausage, diced onions, bell peppers, and cheeses. Mix gently to combine.
In a separate bowl, whisk together eggs, milk, salt, pepper, garlic powder, and paprika until smooth.
Pour the egg mixture evenly over the hash brown mixture. Stir gently to ensure even distribution.
Cover the dish with foil and refrigerate overnight (optional) or bake immediately.
When ready to bake, remove from fridge and let rest at room temperature for 20 minutes. Bake uncovered for 40–45 minutes, until eggs are set and top is golden brown.
Let the casserole cool for 5 minutes before slicing. Garnish with green onions or herbs and serve warm.

Notes

This casserole is incredibly flexible — swap sausage for bacon or use veggies like mushrooms, spinach, or zucchini. It freezes beautifully and reheats perfectly for quick weekday breakfasts.