Breakfast

Cheesy Sausage and Egg Casserole for Cozy Holiday Brunches

Amy Starr | January 19, 2026
Cheesy Sausage and Egg Casserole for Cozy Holiday Brunches
Prep Time
20 min
Cook Time
35 min
Servings
6

When holiday mornings call for comfort without the fuss, this Cheesy Sausage and Egg Casserole delivers. Golden crust, creamy interior, and a savory sausage‑egg‑cheese blend make it the perfect centerpiece for a brunch that feels both festive and home‑cooked. Prepare it the night before, pop it in the oven, and watch family members gather around the table, plates in hand, ready for a warm, indulgent start to the day.

Why You'll Love This Recipe

✓ Crowd‑Pleaser: The rich cheese and hearty sausage satisfy both kids and adults, turning a simple brunch into a celebration.
✓ Make‑Ahead Friendly: Assemble the night before; the casserole firms up, so baking is a quick, stress‑free finish.
✓ Versatile Flavors: Swap sausage for turkey, add spinach or mushrooms, and tailor the cheese blend to suit any palate.

Key Ingredients

The foundation is a blend of smoky breakfast sausage, farm‑fresh eggs, and a trio of cheeses (sharp cheddar, creamy mozzarella, and a pinch of Parmesan). Thick‑cut potatoes create a satisfying base, while a splash of milk keeps the custard silky. Feel free to substitute turkey sausage for a leaner version, or use dairy‑free cheese and almond milk for a gluten‑free, lactose‑free twist without losing richness.

6 large eggs Free‑range for best flavor.
1 cup shredded sharp cheddar Adds tangy depth.
1 cup shredded mozzarella Provides melt‑in‑your‑mouth texture.
½ cup grated Parmesan Adds salty umami.
2 cups diced potatoes (parboiled) Yukon Gold or red‑skinned work well.
½ cup whole milk Creates a silky custard; substitute almond milk if needed.
1 tbsp olive oil For browning the sausage.
½ tsp salt Adjust to taste.
¼ tsp black pepper Freshly ground for aroma.

Instructions

1

Cook the sausage

Heat olive oil in a large skillet over medium heat. Add the crumbled sausage, breaking it apart with a spatula. Cook 5‑7 minutes until browned and crispy. Drain excess fat onto a paper towel, then set the sausage aside to cool slightly.

Pro Tip: For extra flavor, deglaze the pan with a splash of milk before removing the sausage.
2

Prepare the custard

In a large bowl whisk together eggs, milk, salt, and pepper until fully combined. The mixture should be smooth with a faint froth. This will bind the casserole and keep it moist.

Pro Tip: Add a pinch of nutmeg for a subtle holiday note.
3

Layer the base

Spread the parboiled potatoes evenly in a greased 9‑x‑13‑inch baking dish. Sprinkle the cooked sausage over the potatoes, then distribute the shredded cheddar and mozzarella on top.

Pro Tip: Pat the potatoes dry before layering to avoid soggy spots.
4

Add the custard

Pour the egg‑milk mixture evenly over the layered ingredients. Gently tap the dish on the counter to settle the custard and release any air bubbles.

Pro Tip: Sprinkle the Parmesan on top for a golden crust.
5

Bake to perfection

Preheat oven to 375°F (190°C). Bake the casserole for 30‑35 minutes, or until the center is set and the top is a deep golden brown. Let rest 10 minutes before slicing.

Pro Tip: A quick broil for the last 2 minutes adds extra crispness.

Expert Tips

Tip #1: Use Day‑Old Potatoes

Cold, slightly dried potatoes hold their shape better during baking, preventing a mushy base.

Tip #2: Mix Cheeses

Combining sharp cheddar with mild mozzarella creates depth and a perfectly gooey melt.

Tip #3: Rest Before Cutting

A 10‑minute rest lets the custard set, making clean slices and keeping the interior moist.

Storage & Variations

Cool the casserole completely, then refrigerate in an airtight container for up to 3 days. Reheat 20 minutes at 350°F, covered with foil. For a vegetarian spin, replace sausage with sautéed mushrooms and spinach, and use a dairy‑free cheese blend.

Nutrition

Per serving

Calories
420 kcal
Protein
22 g
Fat
28 g
Carbs
12 g

Frequently Asked Questions

Yes. Thaw them completely, pat dry, and cut into bite‑size cubes. This saves prep time while still delivering a firm texture after baking.

Ensure potatoes are par‑boiled and well‑drained. Also, avoid over‑mixing the custard; a gentle pour distributes liquid without saturating the base.

Absolutely. Fold in chopped bell peppers, spinach, or zucchini with the sausage. They add color and extra nutrients without altering the baking time.

Cheesy Sausage and Egg Casserole for Cozy Holiday Brunches

Pin Recipe
Prep
3 min
Cook
3 min
Total
6 min
Servings
4
Category: Breakfast
Cuisine: International
Difficulty: Easy
Course: Main
Quick Tips
  • Make ahead friendly
  • Freezer safe 3 months
  • Easily doubled
  • Customizable

Ingredients

Instructions

1
Cook the sausage

Heat olive oil in a large skillet over medium heat. Add the crumbled sausage, breaking it apart with a spatula. Cook 5‑7 minutes until browned and crispy. Drain excess fat onto a paper towel, then set...

2
Prepare the custard

In a large bowl whisk together eggs, milk, salt, and pepper until fully combined. The mixture should be smooth with a faint froth. This will bind the casserole and keep it moist....

3
Layer the base

Spread the parboiled potatoes evenly in a greased 9‑x‑13‑inch baking dish. Sprinkle the cooked sausage over the potatoes, then distribute the shredded cheddar and mozzarella on top....

4
Add the custard

Pour the egg‑milk mixture evenly over the layered ingredients. Gently tap the dish on the counter to settle the custard and release any air bubbles....

5
Bake to perfection

Preheat oven to 375°F (190°C). Bake the casserole for 30‑35 minutes, or until the center is set and the top is a deep golden brown. Let rest 10 minutes before slicing....

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