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A freshly baked weekday breakfast casserole in a baking dish, ready to serve.

Spicy Sausage and Pepper Breakfast Casserole

This hearty and flavorful breakfast casserole features spicy sausage, colorful bell peppers, and onions baked with eggs and two types of cheese. It's perfect for a weekend brunch or a make-ahead meal.
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Prep Time 20 minutes
Cook Time 45 minutes
Total Time 1 hour 5 minutes
Servings 8 servings
Calories 450 kcal

Equipment

  • 9x13 inch baking dish
  • large skillet
  • large bowl

Ingredients
  

Main Ingredients

  • 1 pound spicy breakfast sausage
  • 1 red bell pepper diced
  • 1 green bell pepper diced
  • 1/2 onion diced
  • 8 large eggs
  • 1 cup milk
  • 1 teaspoon salt
  • 1/2 teaspoon black pepper
  • 1/4 teaspoon cayenne pepper or more, to taste
  • 4 ounces shredded Monterey Jack cheese
  • 4 ounces shredded sharp cheddar cheese
  • Cooking spray or butter for greasing

Garnish (Optional)

  • fresh chopped cilantro or green onions for garnish

Instructions
 

Preparation

  • Preheat your oven to 375°F (190°C) and lightly grease a 9x13 inch baking dish.
  • In a large skillet, cook the spicy breakfast sausage over medium-high heat until it's no longer pink, then drain excess grease and transfer to the prepared baking dish.
  • Using the same skillet, sauté the diced red bell pepper, green bell pepper, and onion for 5-7 minutes until tender-crisp, then spread them evenly over the sausage.
  • In a large bowl, whisk together the eggs, milk, salt, black pepper, and cayenne pepper until well combined.

Assembly and Baking

  • Evenly sprinkle both Monterey Jack and sharp cheddar cheeses over the sausage and vegetable mixture in the baking dish.
  • Carefully pour the whisked egg mixture over all the ingredients in the baking dish, ensuring everything is as coated as possible.
  • Bake the casserole uncovered for 40-50 minutes, or until it is set in the center, golden brown on top, and a knife inserted comes out clean.

Serving

  • Allow the casserole to rest for 5-10 minutes before slicing and serving.
  • Garnish with fresh cilantro or green onions if desired.

Notes

This casserole can be assembled the night before and baked in the morning for a quick and easy breakfast. Cover and refrigerate overnight, then add about 10-15 minutes to the bake time.