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Cheesy Hashbrown & Sausage Breakfast Casserole

Hearty, customizable, and perfect for meal prep!

Breakfast is hands-down one of my favorite meals, and honestly, it’s fair game any time of day in our house. This casserole is big and filling, making it perfect for a cozy weekend breakfast or for prepping lunches you can enjoy all week long!

Cheese & Veggie Variations

I went with cheddar cheese for this version, but you can definitely mix things up with other cheeses you love. Here are some tasty ideas:

  • Pepper Jack—adds a little kick if you like things spicy!
  • Swiss or Gruyère—great for a nuttier, milder flavor.
  • Colby or Monterey Jack—melt smoothly and taste delicious.

Feel free to use a blend for extra flavor or pick whatever’s in your fridge.

When it comes to veggies, adding them is a fantastic way to boost nutrition and color. I recommend diced bell peppers (any color), sliced mushrooms, or chopped fresh spinach. You can also try green onions, diced zucchini, or even a handful of cherry tomatoes (halved).

Pro tip: Sauté your veggies in a little oil or butter for 3-5 minutes before mixing them in—this helps reduce their moisture so your casserole sets up nicely and isn’t soggy. If you add extra veggies or cheese, you might need to bake your casserole for an extra 5-10 minutes to make sure it’s cooked through.

I was today years old…

I always reach for Jimmy Dean when a recipe calls for sausage, and I’ve been a loyal fan for years. But here’s a little confession: for some reason, I always opened the sausage tube from the ends by cutting off the metal clips and squeezing out the sausage. Messy and awkward! Recently, I ran a knife along the side seam of the package and—voilà!—it opened cleanly and easily. It was definitely one of those “I was today years old when I realized” moments, LOL!

Package of Jimmy Dean sausage being opened

Do you have a funny cooking discovery or tip? Share it in the comments—I’d love to hear your stories!

Ingredients

  • 1 pound of breakfast sausage
  • 1 pound of frozen shredded hashbrowns, thawed
  • ¼ cup diced onion (tip: dice the whole onion and freeze leftovers for next time)
  • 3 cups of cheddar cheese (or your favorite cheese, see tips above)
  • 8 eggs
  • 2 cups of milk
  • Salt and pepper to taste (I use about ¼ tsp each)
  • Optional: 1-2 cups of sautéed veggies (see above for ideas)

Step-by-Step Instructions

  1. Preheat your oven to 375°F.
  2. Prepare ingredients: Dice your onion and any veggies you’d like to add. If using extra veggies, sauté them in a pan over medium heat for 3-5 minutes until softened and most of the moisture is gone. You don’t need to sauté the onions.
  3. Brown the sausage: Cook the sausage over medium-high heat, breaking it up into small pieces. Drain the fat.
  4. Mix: In a large bowl, combine the cooked sausage, hashbrowns, onion, cheese, sautéed veggies (if using), and salt and pepper. Stir until evenly mixed.
  5. Egg mixture: In a separate bowl, whisk together the eggs and milk until smooth.
  6. Assemble: Grease a 9×13-inch baking dish. Spread the sausage and potato mixture evenly in the dish. (Time-saving tip: You can mix everything right in the dish, but it may get a little messy!)
  7. Pour: Pour the egg mixture evenly over the top of the casserole.
  8. Bake: Place the dish in the center of your preheated oven. Bake for 45 minutes to 1 hour. If you’ve added lots of veggies or extra cheese, check at 45 minutes and continue baking as needed—sometimes it’ll take an extra 5-10 minutes.
  9. Check for doneness: The casserole is done when the top is golden and the center is firm. If the top is browning too quickly, cover loosely with foil for the remaining baking time.

Serving Suggestions

This recipe makes 12 regular servings or 8 generous ones. Leftovers reheat very well, so it’s a great choice for meal prep. For a fresh and tasty side, try serving it with sliced tomatoes, avocado, or a quick fruit salad.

Share your story

Cooking is all about experimenting, learning, and having fun! If you try this casserole, or have a funny kitchen story, a favorite cheese or veggie combo, or a cooking tip you swear by, share it in the comments below. Let’s learn from each other and build our cooking community!

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