The Best Overnight Breakfast Casserole

This breakfast casserole is perfect for you! It is super easy, affordable and the BEST EVER! You can totally claim this recipe and be the star of your meal.

You’ll Need:

  • 6 English Muffins , halved and cut into cubes
  • 16 oz roll of Breakfast Sausage , original or spicy
  • 12 large eggs
  • 1/2 cup onion, chopped
  • 1/4 cup butter, melted
  • 2 cups milk
  • 2 cups Colby Jack cheese
  • 1/2 cup red or green pepper , diced
  • Salt , to taste
  • 1/2 teaspoon pepper
  • 1/2 teaspoon ground mustard
  • Optional: parsley to top


  1. Spray a 9x13 pan with cooking spray. Sprinkle in English muffins and drizzle with melted butter. Set aside.
  2. In a pan, brown sausage. Drain grease.
  3. Sprinkle sausage over English muffins in pan. Add peppers and onion. Sprinkle with cheese.
  4. In a large bowl, whisk eggs, milk, ground mustard, salt and pepper.
  5. Pour egg mixture over casserole. Cover and refrigerate overnight.
  6. In the morning, preheat oven to 350ยบ.
  7. Bake until golden brown, 45-50 minutes. A knife should come out clean from center.


  • Feel free to use whatever cheese variety or English muffin type you want. The sausage can be hot or mild.