Make Ahead Sausage Casserole: A Comforting Breakfast or Brunch Delight

There’s something magical about a warm, hearty casserole waiting in the oven, filling your home with irresistible aromas. The Make Ahead Sausage Casserole is a perfect blend of savory sausage, fluffy eggs, melty cheese, and tender bread or potatoes, making it a versatile dish for breakfast, brunch, or even a casual dinner. The beauty of this casserole is that you can prepare it in advance, refrigerate it overnight, and bake it the next morning—making busy weekdays or holiday mornings effortless.

Ingredients

For a casserole that serves about 6–8 people, you’ll need:

1 pound (450g) breakfast sausage (mild or spicy, depending on preference)
6 large eggs
2 cups milk (whole milk is ideal, but 2% works fine)
4 cups cubed bread (day-old bread or baguette works best)
1 ½ cups shredded cheese (cheddar, Monterey Jack, or a mix)
1 medium onion, diced
1 bell pepper, diced (optional, for extra flavor and color)
1–2 cloves garlic, minced
Salt and pepper, to taste
1 teaspoon mustard powder (optional, for subtle depth)
1 teaspoon dried herbs (thyme, oregano, or Italian seasoning)
Butter or non-stick spray for greasing the baking dish

Step-by-Step Method

Step 1: Preheat and Prep

Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish with butter or non-stick spray. This prevents sticking and ensures the casserole releases easily after baking.

Step 2: Cook the Sausage

In a large skillet over medium heat, cook the sausage until browned and fully cooked through. Break it into small crumbles as it cooks. Once done, transfer it to a plate lined with paper towels to drain excess fat.

Step 3: Sauté the Vegetables

In the same skillet, sauté the onion and bell pepper for 3–4 minutes until soft. Add the garlic and cook for another 30 seconds until fragrant. Combine the sautéed vegetables with the cooked sausage.