Introduction
This Cheesy Sausage Breakfast Casserole is a hearty, comforting breakfast made with savory sausage, fluffy eggs, creamy cheese, and a golden melted-cheese topping.
It is an easy breakfast casserole that can be prepared ahead of time, making it perfect for busy mornings, weekend brunches, holidays, and family gatherings.
Every bite is rich, cheesy, and satisfying, with browned sausage throughout and a beautifully golden top.
Recipe Overview
| Details | Information |
| Recipe | Cheesy Sausage Breakfast Casserole |
| Category | Breakfast, Brunch |
| Cuisine | American |
| Prep Time | 15 minutes |
| Cook Time | 40–45 minutes |
| Total Time | About 1 hour |
| Servings | 8–10 |
| Difficulty | Easy |
| Oven Temperature | 350°F (175°C) |
| Main Ingredients | Sausage, eggs, milk, cheese |
| Best For | Breakfast, brunch, holidays, meal prep |
Why You’ll Love This Recipe
This sausage breakfast casserole is incredibly easy to prepare and uses simple ingredients that are easy to find.
The combination of seasoned breakfast sausage, tender eggs, and melted cheddar creates a rich and comforting flavor that the whole family will enjoy.
The cheesy top becomes beautifully golden while the inside stays soft and creamy.
It is also a fantastic make-ahead breakfast. You can assemble the casserole the night before and bake it the next morning.
Ingredients
Main Ingredients
| Ingredient | Amount |
| Breakfast sausage | 1 lb (450 g) |
| Large eggs | 10 |
| Whole milk | 1 cup (240 ml) |
| Shredded cheddar cheese | 2 cups (200 g) |
| Shredded Monterey Jack cheese | 1 cup (100 g) |
| Garlic powder | ½ tsp |
| Onion powder | ½ tsp |
| Salt | ½ tsp |
| Black pepper | ¼ tsp |
| Fresh parsley, chopped | 2 tbsp |
| Butter or cooking spray | For the baking dish |
Optional Additions
| Ingredient | Amount |
| Diced onion | ½ cup |
| Diced bell pepper | ½ cup |
| Chopped spinach | 1 cup |
| Diced mushrooms | ½ cup |
| Red pepper flakes | ¼ tsp |
Step-by-Step Instructions
Step 1: Prepare the Sausage
Preheat your oven to 350°F (175°C).
Heat a large skillet over medium heat.
Add the breakfast sausage and cook for approximately 7–9 minutes, breaking it into small pieces as it cooks.
Continue cooking until the sausage is browned and completely cooked through.
Drain excess grease if necessary and set the sausage aside.
Step 2: Prepare the Baking Dish
Lightly grease a 9 × 13-inch baking dish with butter or nonstick cooking spray.
Spread the cooked sausage evenly across the bottom of the dish.
If you are adding onions, peppers, mushrooms, or spinach, distribute them evenly over the sausage.
Step 3: Prepare the Egg Mixture
Crack the eggs into a large bowl.
Add the milk, garlic powder, onion powder, salt, and black pepper.
Whisk until the eggs and milk are completely combined and the mixture looks smooth.
Step 4: Add the Cheese
Sprinkle approximately half of the cheddar and Monterey Jack cheese over the sausage.
Pour the egg mixture evenly over everything in the baking dish.
Gently shake the dish or use a spatula to distribute the ingredients evenly.
Step 5: Add the Final Cheese Layer
Sprinkle the remaining cheddar and Monterey Jack cheese evenly over the top.
Make sure the cheese reaches close to the edges for a delicious golden crust.
Step 6: Bake
Place the casserole in the preheated oven.
Bake uncovered for approximately 40–45 minutes, or until the center is set and the top is melted and golden brown.
The internal temperature should reach approximately 160°F (71°C) when checked in the center.
Step 7: Rest Before Serving
Remove the casserole from the oven and allow it to rest for 8–10 minutes.
This gives the eggs time to finish setting and makes the casserole easier to slice.
Sprinkle freshly chopped parsley over the top before serving.
Best Tips
Brown the sausage thoroughly before adding it to the casserole. This develops better flavor and prevents excess grease from making the eggs watery.
Use freshly shredded cheese whenever possible. It melts more smoothly and gives the casserole a creamier texture.
Do not overbake the casserole. Once the center is just set, remove it from the oven to prevent the eggs from becoming dry or rubbery.
Allowing the casserole to rest for a few minutes after baking makes a noticeable difference when slicing and serving.
For an especially golden top, you can place the casserole under the broiler for 1–2 minutes at the end of cooking. Watch it carefully so the cheese does not burn.
Best Ingredient Options
Best Sausage
Classic pork breakfast sausage gives this casserole a rich and savory flavor.
You can also use turkey sausage or chicken sausage for a lighter option.
For extra heat, choose a spicy breakfast sausage.
Best Cheese
Sharp cheddar provides excellent flavor and melts beautifully.
Monterey Jack makes the casserole especially creamy and stretchy.
You can also use mozzarella, Colby Jack, Pepper Jack, Swiss cheese, or Gruyère.
Best Milk
Whole milk produces the richest texture.
For an even creamier casserole, you can replace part of the milk with half-and-half.
Recipe Variations
For a spicy breakfast casserole, use hot sausage and Pepper Jack cheese, then add a pinch of red pepper flakes.
For a vegetable-packed version, add sautéed bell peppers, onions, mushrooms, and spinach.
For a bacon and sausage casserole, replace half of the sausage with cooked crispy bacon.
For a ham and cheese breakfast casserole, replace the sausage with diced cooked ham and add extra cheddar.
You can also add diced cooked potatoes or hash browns to make the casserole even heartier.
What to Serve With
Serve this cheesy sausage casserole with fresh fruit for a simple and balanced breakfast.
Crispy breakfast potatoes or hash browns make an excellent side for a larger brunch.
For a lighter option, serve it with a fresh green salad or sliced tomatoes.
Coffee, fresh orange juice, or a fruit smoothie also pairs beautifully with this hearty breakfast recipe.
Make-Ahead Instructions
This breakfast casserole is ideal for making ahead.
Prepare the casserole completely, cover the baking dish tightly, and refrigerate it overnight.
The next morning, remove it from the refrigerator while the oven preheats.
Bake at 350°F (175°C) for approximately 45–55 minutes, adding a few extra minutes if the casserole is still very cold in the center.
For the best texture, do not leave the unbaked casserole refrigerated for more than 24 hours.
Storage
Allow leftover casserole to cool before storing.
Place individual portions in airtight containers and refrigerate for up to 3–4 days.
Keep the casserole refrigerated at 40°F (4°C) or below.
Reheating
For individual portions, microwave for approximately 60–90 seconds, checking halfway through.
For larger portions, cover with foil and reheat in a 325°F (165°C) oven until warmed through.
Adding a small amount of fresh cheese before reheating can help restore the creamy, cheesy texture.
Freezing
This casserole can be frozen after baking.
Allow it to cool completely, then cut it into individual portions.
Wrap each portion tightly and place it in a freezer-safe container or bag.
Freeze for up to 2–3 months for the best quality.
Thaw overnight in the refrigerator before reheating.
Common Mistakes to Avoid
Do not leave excessive grease in the cooked sausage. Too much fat can make the casserole greasy.
Avoid using too much milk because an overly wet egg mixture can prevent the center from setting properly.
Do not overbake the casserole. Eggs continue cooking from residual heat after the dish comes out of the oven.
Avoid cutting the casserole immediately after baking. A short resting period helps the slices hold together.
Do not add raw watery vegetables without cooking or draining them first. Excess moisture can make the casserole watery.
Nutrition Estimate
| Nutrient | Approximate Amount Per Serving |
| Calories | 390 kcal |
| Protein | 25 g |
| Carbohydrates | 4 g |
| Fat | 30 g |
| Saturated Fat | 13 g |
| Cholesterol | 255 mg |
| Sodium | 780 mg |
| Fiber | 0.5 g |
| Sugar | 2 g |
| Calcium | 300 mg |
Nutrition information is an estimate and will vary depending on the sausage, cheese, milk, and serving size used.
Frequently Asked Questions
Can I make this breakfast casserole the night before?
Yes. Assemble it completely, cover it, and refrigerate overnight. Bake it the following morning until the center is fully set.
Can I use turkey sausage?
Absolutely. Turkey sausage is an excellent substitute for pork sausage and works well with cheddar and Monterey Jack cheese.
Can I add potatoes?
Yes. Cooked diced potatoes or prepared hash browns can be added to make this an even heartier breakfast casserole.
Why is my casserole watery?
Watery casserole is usually caused by excess liquid from milk, vegetables, or sausage.
Drain the sausage well and sauté watery vegetables before adding them to the dish.
How do I know when the casserole is done?
The center should look set rather than liquid or jiggly. A thermometer inserted into the center should register approximately 160°F (71°C).
Can I use different cheese?
Yes. Cheddar, Monterey Jack, mozzarella, Colby Jack, Pepper Jack, Swiss, and Gruyère are all excellent options.
Can I freeze this casserole?
Yes. Bake it first, cool it completely, portion it, and freeze it in airtight packaging for up to 2–3 months.
Final Thoughts
This Cheesy Sausage Breakfast Casserole is an easy, hearty breakfast recipe that brings together savory sausage, fluffy eggs, and plenty of melted cheese in one comforting dish.
It is simple enough for a weekend breakfast but special enough for Christmas morning, Easter brunch, Mother’s Day, or a family gathering.
Prepare it ahead, bake it until golden and bubbly, then let it rest before serving.
With its creamy center, flavorful sausage, and irresistible cheesy topping, this is the kind of breakfast casserole everyone will want seconds of.