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Easy Cheesy Sausage Egg and Cheese Breakfast Casserole

easy cheesy sausage egg and cheese breakfast casserole - featured image

A quick and easy breakfast casserole combining savory sausage, fluffy eggs, and melty cheese, perfect for busy mornings and gatherings.

Ingredients

Scale
  • 1 pound breakfast sausage links or bulk sausage, browned and crumbled
  • 8 large eggs (room temperature)
  • 1 cup whole milk or half-and-half (240 ml)
  • 2 cups shredded sharp cheddar cheese, divided (200 g)
  • 4 cups cubed day-old bread (about 6 slices; white, sourdough, or whole wheat)
  • 1 small yellow onion, finely chopped
  • 2 cloves garlic, minced (optional)
  • 1 teaspoon Dijon mustard (optional)
  • Salt and freshly cracked black pepper to taste
  • Butter or cooking spray for greasing the baking dish

Instructions

  1. Preheat your oven to 350°F (175°C). Grease a 9×13 inch baking dish with butter or cooking spray.
  2. Heat a skillet over medium heat and crumble in the breakfast sausage. Cook until browned and cooked through, about 7-10 minutes. Transfer sausage to paper towels to drain excess fat, leaving about 1 tablespoon of fat in the pan.
  3. In the same skillet with sausage fat, add chopped onion and cook until softened, about 3-4 minutes. Stir in minced garlic and cook for 30 seconds until fragrant. Remove from heat.
  4. Cube the day-old bread into roughly 1-inch pieces and spread evenly in the greased baking dish.
  5. In a large bowl, whisk together eggs, milk, Dijon mustard, salt, and pepper.
  6. Sprinkle cooked sausage evenly over the bread cubes. Add the sautéed onion and garlic mixture on top. Sprinkle 1 ½ cups of shredded cheddar cheese over everything.
  7. Slowly pour the egg mixture evenly over the assembled ingredients. Press down lightly on the bread cubes with a spatula to help soak up the egg mixture.
  8. Sprinkle the remaining ½ cup of cheddar cheese on top.
  9. Bake in the preheated oven for 40-45 minutes, or until eggs are set and the top is golden brown. A knife inserted in the center should come out clean.
  10. Let the casserole cool for 5-10 minutes before slicing and serving.

Notes

Use day-old or slightly toasted bread to prevent sogginess. Browning the sausage properly locks in flavor and reduces grease. You can assemble the casserole the night before and bake in the morning, adding 10-15 minutes to baking time if baking from cold. Tent with foil if edges brown too quickly.

Nutrition

Keywords: breakfast casserole, sausage casserole, cheesy breakfast, egg casserole, easy breakfast, make-ahead breakfast