Overnight Cheesy Sausage and Hashbrown Breakfast Casserole Recipe

Introduction

Few dishes guarantee a warm, hearty start to your morning like a Cheesy Sausage and Hashbrown Breakfast Casserole, prepped the night before. With its crisp hashbrowns, savory sausage, and velvety cheese custard, this dish offers comfort, convenience, and big flavor. Its overnight assembly makes it a favorite for busy mornings, brunches, holidays, or when hosting guests—just bake and serve!

Why This Overnight Cheesy Sausage and Hashbrown Breakfast Casserole Shines

The beauty of this casserole lies in its ease: everything gets combined in one dish before you head to bed, and the flavors only deepen as it rests overnight. Golden hashbrowns provide a crispy base, while juicy sausage and melty cheese bring richness and depth. The custard made from eggs and milk ensures a fluffy, cohesive texture with plenty of flavor in every bite. This recipe is perfect for feeding a crowd or meal-prepping your breakfasts for the week.

Preparing the Ingredients for Ultimate Flavor

For the best results, choose high-quality breakfast sausage—mild or spicy, depending on your taste. Shred your cheeses fresh for ultimate meltiness and flavor. Chopping the onions and peppers quickly and evenly is made much simpler with the Mueller Pro-Series 10-in-1, 8 Blade Vegetable Chopper, ensuring consistent texture throughout your casserole.

To save time, use frozen hashbrowns—just thaw and pat dry to prevent sogginess. If you prefer a hands-off way to brown your sausage, the SENSARTE Nonstick Frying Pan Skillet, 9.5 Inch is perfect for even cooking and easy cleanup.

Assembling and Resting: The Overnight Advantage

Layering is key: start with the hashbrowns, then add sausage and veggies, and finish with the cheesy custard. Cover tightly and refrigerate to allow the flavors to meld together. Using the Rubbermaid Brilliance Food Storage Containers for pre-chopped ingredients can streamline your prep, keeping everything fresh until assembly.

Cover your casserole dish with a sheet from the Reynolds Kitchens Brown Parchment Paper Roll if you want easy cleanup (and to prevent sticking) after baking.

Baking and Serving Suggestions

Bake your casserole in the morning until golden and puffed; give it a moment to set before slicing for clean, picture-perfect servings. Serve with hot sauce, fresh fruit, or a light salad for balance. This casserole also reheats beautifully, making it a great make-ahead option for meal prep or next-day brunches.

Nutritional Information and Yields

This recipe serves approximately 8 generous portions. Each serving contains about 350–400 calories depending on your cheese and sausage choices. It’s a balanced combination of protein, carbs, and fats—hearty enough to keep you energized all morning.

Overnight Cheesy Sausage and Hashbrown Breakfast Casserole (Recap)

Convenient, comforting, and crowd-pleasing, this overnight casserole is the secret weapon of breakfast hosts everywhere. The layers of hashbrowns, sausage, cheese, and custard transform simple ingredients into a dish that’s as celebratory as it is practical.

Instructions

1. In a large skillet (like the SENSARTE Nonstick Frying Pan Skillet), cook the sausage over medium heat, breaking it up with a spatula or Farberware Professional Heat Resistant Nylon Meat and Potato Masher until browned and cooked through. Transfer to a paper towel-lined plate to drain.
2. Add the chopped onion and bell pepper to the same pan and sauté until soft, about 3–4 minutes.
3. Grease a 9×13-inch baking dish. Spread the thawed, patted-dry hashbrowns evenly on the bottom.
4. Layer the cooked sausage, then sautéed onions and peppers, over the hashbrowns. Top with both cheeses.
5. In a large bowl, whisk together eggs, milk, garlic powder, Dijon mustard, salt, and pepper (using a Ninja BL610 Professional 72 Oz Countertop Blender can make this quick and ensures a perfectly smooth custard).
6. Pour the egg mixture evenly over the layers in the baking dish. Cover tightly with foil or plastic wrap, and refrigerate overnight.
7. In the morning, preheat oven to 350°F. Remove casserole from refrigerator, uncover, and bake for 45–55 minutes, or until the center is set and the top is golden brown.
8. Let rest for 10 minutes before slicing. Garnish with fresh chives, if desired.

Cook and Prep Times

Prep Time: 25 minutes
Cook Time: 50 minutes
Overnight Rest: 8 hours (minimum)
Total Time: ~9 hours 15 minutes (mostly inactive time)

Enjoy the ultimate in breakfast ease and flavor with this simple, make-ahead Cheesy Sausage and Hashbrown Breakfast Casserole—guaranteed to start any day off right!