Sausage Breakfast Casserole Recipe

4.74 from 50 votes

Start your day right with delicious baked sausage breakfast casserole. Perfect if you are feeding a crowd and great for make ahead breakfast.

Step-by-step photos can be seen below the recipe card.

Prep Time25

Cook Time40

Total Time1 5

Course: Breakfast

Cuisine: American

Servings: servings

Preheat the oven to 350°F. Spray a 9x13-inch casserole dish with nonstick spray.
In a skillet set over medium heat, brown the sausage. Remove the cooked sausage to a paper towel-lined plate to drain.
1 pound breakfast sausage
Add the mushrooms, onion, and bell peppers to the skillet and sauté for 2-3 minutes until softened. Set aside to cool slightly.
½ cup sliced mushrooms, ½ cup diced onion, ½ cup diced green bell pepper, ½ cup diced red bell pepper
In a large bowl, combine the eggs, sour cream, cream, salt, garlic powder, and pepper. Whisk until well combined. Fold in 1 cup of cheese.
12 large eggs, 1 cup sour cream, ¼ cup heavy cream, 1 teaspoon kosher salt, ½ teaspoon garlic powder, ½ teaspoon ground black pepper, 2 cups freshly shredded cheddar cheese
Layer the cooked sausage and vegetables in the casserole dish. Pour the egg mixture over the top, then sprinkle with the remaining cheese.
Pour the mixture into the prepared pan. Bake for 35-40 minutes, until the edges are set and the center is just barely jiggly.
Serve garnished with sliced green onions.
Sliced green onions

Storage: Store this sausage breakfast casserole covered in the refrigerator for up to 3 days or in the freezer for up to 2 months.