Breakfast Recipes, Christmas Recipes, Easy Recipes

Best Breakfast Casserole Recipe with Sausage

October 12, 2025

Overnight Easy Sausage Breakfast Casserole is everything you love about breakfast baked into one hearty dish. Packed with cheesy eggs, savory sausage, hash browns, and colorful peppers and onions, it’s the perfect way to start your day. Whether you make it ahead or bake it fresh, it’s always a crowd-pleaser.

What makes this Overnight Easy Sausage Breakfast Casserole so great is its versatility. You can prepare it the night before for an easy morning meal or whip it up last minute for brunch. Warm, cheesy, and full of flavor — it’s a holiday favorite you’ll want all year round.

Best Breakfast Casserole Recipe with Sausage

Best Breakfast Casserole Recipe with Sausage

Best Breakfast Casserole Recipe with Sausage

Overnight Easy Sausage Breakfast Casserole is everything you love about breakfast baked into one hearty dish. Packed with cheesy eggs, savory sausage, hash browns, and colorful peppers and onions, it’s the perfect way to start your day. Whether you make it ahead or bake it fresh, it’s always a crowd-pleaser.

Prep Time 20 minutes
Cook Time 2 hours 20 minutes
Total Time 2 hours 40 minutes

Ingredients

  • 1/2 cup butter, (1 stick)
  • 1 (30-oz) package shredded hash brown potatoes, diced is ok, not my fav
  • salt and pepper
  • 1 pound breakfast sausage, bulk
  • 1/2 green pepper, chopped
  • 1/2 red pepper, chopped
  • 1/2 small onion, diced
  • 1 & 1/2 cups shredded Monterey Jack cheese, packed
  • 1 & 1/2 cups shredded sharp cheddar cheese, packed
  • 8 large eggs
  • 1 & 1/3 cups half and half, cream, evaporated milk, or whole milk*
  • 1 teaspoon seasoned salt
  • 1/2 teaspoon kosher salt, 1/4 teaspoon if using table salt
  • 1/2 teaspoon black pepper
  • 1/4 teaspoon dry mustard, optional

Instructions

Read Directions

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Notes

Overnight Instructions:

After you pour the egg mixture over the casserole in step 11, cover the casserole tightly and refrigerate overnight. The next morning, get the casserole out of the fridge and let it hang out on the counter for a bit while you preheat the oven to 350. When the oven is nice and hot, bake at 350 for 40-45 minutes until the edges are browned and bubbly, and the center doesn’t jiggle too much when you shake the pan. Let set for 5 minutes before serving. 

*You can use half and half, cream, evaporated milk, or milk. The higher the fat content, the richer your casserole will be.

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