Breakfast Egg Casserole Recipe

Mornings are much easier when breakfast can be prepared ahead and ready when you need it. This Breakfast Egg Casserole combines fluffy eggs, savory sausage, shredded cheese, vegetables, and hash browns in one comforting dish that works beautifully for busy mornings or weekend brunch.

The layers bake together into a hearty casserole with a cheesy top, tender potatoes, and a satisfying combination of flavors in every slice. Prepare it for family breakfasts, holiday mornings, or portion it out for simple meals throughout the week.

Why You’ll Reach for This Recipe Again

• Make-Ahead Friendly: Assemble it ahead of time so breakfast is ready with minimal morning effort.
• Feeds a Crowd: The 9×13-inch baking dish makes enough servings for gatherings and family meals.
• Complete Breakfast: Includes protein, vegetables, cheese, and potatoes in one dish.
• Easy Meal Prep: Slice into portions and enjoy convenient breakfasts throughout the week.
• Simple Assembly: Most of the preparation involves layering ingredients and mixing the egg base.
• Customizable Base: Change the sausage, cheese, or vegetables to create different versions.

Ingredient Notes & Easy Substitutions

this Recipe

1. Breakfast Sausage: Use mild or spicy sausage depending on your preference. Fully cook and drain excess grease before adding it to the casserole.
2. Eggs: Large eggs create the structure for the casserole. Whisk well with the dairy ingredients for an even texture.
3. Sour Cream: Adds richness and helps create a softer egg mixture. Plain Greek yogurt can be used as an alternative.
4. Hash Browns: Thawed frozen hash browns make this recipe convenient. Drain any extra moisture before layering.
5. Cheddar and Monterey Jack Cheese: This combination gives a balanced cheesy flavor and melts smoothly. A Mexican cheese blend also works well.
6. Vegetables: Bell peppers and onions add flavor and texture. Mushrooms, spinach, or tomatoes can also be added.

Chef’s Tip: Thaw and drain frozen hash browns before assembling the casserole. Excess moisture can prevent the bottom layer from becoming nicely set.

Breakfast Egg Casserole Recipe

This Breakfast Egg Casserole is a simple make-ahead dish made with eggs, sausage, cheese, and vegetables baked together until fluffy and golden. It is an easy option for weekend breakfasts, brunch gatherings, or meal prep throughout the week.

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Prep Time 20 minutes mins

Cook Time 45 minutes mins

Total Time 1 hour hr 5 minutes mins

Course Breakfast, brunch

Cuisine American

Servings 12

Calories 320 kcal

Equipment

• 9×13 inch baking dish
• Large skillet
• Large mixing bowl
• Whisk
• Wooden spoon
• Chef's knife
• Cutting Board
• Measuring cups and spoons

Ingredients

  

• 1 pound breakfast sausage
• 10 large eggs
• 2 cups whole milk
• 1/2 cup sour cream
• 2 cups shredded cheddar cheese
• 1 cup shredded Monterey Jack cheese
• 1 medium bell pepper diced
• 1 small yellow onion diced
• 2 cups frozen hash browns thawed
• 2 tablespoons chopped green onions
• 1 teaspoon garlic powder
• 1 teaspoon dried oregano
• 1/2 teaspoon salt
• 1/2 teaspoon black pepper
• Cooking spray or butter for greasing the dish

Instructions

 

• Preheat the oven to 350°F (175°C). Lightly grease a 9×13-inch baking dish with cooking spray or butter.
• Heat a large skillet over medium heat and cook the breakfast sausage until browned and fully cooked. Add the diced onion and bell pepper, then cook until the vegetables soften.
  
• Spread the thawed hash browns evenly across the bottom of the prepared baking dish. Add the cooked sausage and vegetable mixture over the top.
  
• In a large bowl, whisk together the eggs, milk, sour cream, garlic powder, oregano, salt, and black pepper until smooth.
  
• Pour the egg mixture evenly over the sausage and hash browns. Sprinkle the shredded cheddar and Monterey Jack cheese on top.
  
• Bake until the center is set and the cheese is melted and lightly golden. Let the casserole rest for a few minutes before slicing.
  
• Garnish with green onions and serve warm.
  

Nutrition Information

Helpful Tips for the Best Breakfast Casserole

• Cook Sausage Fully: Browning the sausage before baking adds better flavor and removes excess grease.
• Drain Frozen Potatoes: Removing extra moisture helps create a firmer casserole base.
• Spread Ingredients Evenly: Even layers help every slice contain sausage, potatoes, eggs, and cheese.
• Avoid Overbaking: Remove the casserole once the center is set to keep the eggs tender.
• Let It Rest: A short resting period makes slicing cleaner and easier.
• Use Freshly Shredded Cheese: It melts more smoothly than many pre-shredded varieties.

Creative Ways to Use Leftovers

• Breakfast Sandwich: Add a slice between an English muffin or biscuit with extra cheese.
• Breakfast Burrito: Wrap reheated casserole pieces in a tortilla with salsa.
• Casserole Bowl: Serve warmed pieces over roasted potatoes or fresh greens.
• Stuffed Peppers: Fill halved bell peppers with leftover casserole and bake until heated.
• Savory Toast: Place slices over toasted bread with avocado or hot sauce.
• Mini Muffin Portions: Cut leftovers into small pieces for quick breakfast bites.
• Loaded Hash Brown Bowl: Add extra potatoes and toppings for a hearty meal.

More Breakfast Recipes You’ll Enjoy

1. Scrambled Eggs
2. Keto Egg Muffins
3. Egg White Omelette
4. Spinach Mushroom Omelette

Best Ways to Store Leftovers

Frequently Asked Questions

1. Can I prepare this casserole the night before?
   Yes. Assemble the casserole, cover it tightly, and refrigerate overnight. Bake it fresh the next morning.
2. Can I use fresh potatoes instead of frozen hash browns?
   Yes. Shredded or diced fresh potatoes can be used, but they should be cooked slightly before adding them to the casserole.
3. How do I know when the casserole is fully baked?
   The center should be set, and a knife inserted into the middle should come out without liquid egg mixture.
4. Can I use a different type of sausage?
   Yes. Turkey sausage, chicken sausage, or other breakfast sausage varieties can be used.
5. Why is my casserole watery after baking?
   Extra moisture from vegetables, thawed potatoes, or under-drained ingredients can cause excess liquid.
6. Can I add more cheese to this recipe?
   Yes. Additional cheese can be added on top or mixed into the egg mixture before baking.
7. Can I make this casserole without meat?
   Yes. Replace the sausage with extra vegetables like mushrooms, spinach, or peppers.

Noah Baker

hi there,
The Freshman Cook started as a place to keep track of recipes I wanted to make again. Somewhere along the way, it grew into a collection of meals that friends requested, desserts that disappeared too quickly, and weeknight dinners that made life a little easier.
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