Best Father’s Day Brunch Casserole – 45-Minute

Father's Day calls for a brunch that feels special but doesn't chain you to the stove. This Father's Day Brunch Casserole is my go-to – it's hearty, cheesy, and packed with savory sausage and veggies. You can assemble it the night before, then pop it in the oven while Dad opens his cards.

I started making this when my own dad requested 'something with eggs and potatoes' every single year. Now it's a tradition that my whole family looks forward to. The best part? It's forgiving – you can swap in whatever veggies or cheese you have on hand.

About the Ingredients

1 lb (450g) breakfast sausage

Use mild or spicy. For a leaner option, try turkey sausage.

1 medium onion, diced

Yellow or sweet onion. Shallots work too.

1 red bell pepper, diced

Any color bell pepper. For heat, add a jalapeño.

8 large eggs

Use room temperature for easier mixing.

1 cup (240ml) milk

Whole or 2% works best. Non-dairy milk like oat or almond also works.

1 tsp salt

Fine sea salt preferred.

1/2 tsp black pepper

Freshly ground for best flavor.

3 cups (about 300g) frozen shredded hash browns, thawed

Or use 3 cups of cubed cooked potatoes.

1 cup (120g) shredded cheddar cheese

Sharp cheddar adds more flavor. Swiss or Monterey Jack also great.

1/2 cup (60g) shredded mozzarella cheese

For extra meltiness. You can use all cheddar if preferred.

2 green onions, sliced (for garnish)

Optional but adds freshness.

Tips & Tricks

• Thaw the hash browns and pat them dry to avoid a watery casserole.
• Don't overbake – the center should be just set; it will continue to cook as it rests.
• If making ahead, let the casserole sit at room temperature for 20 minutes before baking to ensure even cooking.

Step-by-Step Instructions

1. Preheat and prep

Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish with butter or nonstick spray.

2. Cook sausage and veggies

In a large skillet over medium-high heat, cook the sausage, breaking it into crumbles, until browned, about 5-7 minutes. Add the onion and bell pepper, and cook until softened, about 3 minutes more. Drain excess fat if needed. Spread the mixture evenly in the prepared dish.

3. Scatter hash browns

Evenly distribute the thawed hash browns over the sausage mixture. Press down gently.

4. Whisk egg mixture

In a large bowl, whisk together the eggs, milk, salt, and pepper until well combined. Pour the mixture over the casserole, ensuring it covers evenly.

5. Top with cheese

Sprinkle the cheddar and mozzarella cheeses over the top.

6. Bake to perfection

Bake for 35-40 minutes, or until the edges are golden brown and the center is set (a knife inserted into the middle comes out clean). The internal temperature should reach 160°F (71°C).

7. Rest and garnish

Let the casserole rest for 10 minutes before slicing. Garnish with green onions if desired.

Delicious Variations

Vegetarian

Skip the sausage and add sautéed mushrooms and spinach.

Southwest

Add a drained can of diced green chiles and pepper jack cheese.

Bacon Lover

Substitute bacon for sausage, cook until crispy, and crumble.

How to Store Father's Day Brunch Casserole

Frequently Asked Questions

Make this Father's Day special with a casserole that shows Dad how much you care. It's simple, heartfelt, and delicious – and he'll love the leftovers too. Small steps, big impact.

Father's Day Brunch Casserole

Hearty Father's Day brunch casserole with sausage, eggs, and cheese – easy, make-ahead, and feeds a crowd.

★★★★½ 4.8 (156 ratings)

15 minPrep time40 minCook time8Servings285 kcalCalories

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🧂 Ingredients

• 1 lb (450g) breakfast sausage
• 1 medium onion, diced
• 1 red bell pepper, diced
• 8 large eggs
• 1 cup (240ml) milk
• 1 tsp salt
• 1/2 tsp black pepper
• 3 cups (about 300g) frozen shredded hash browns, thawed
• 1 cup (120g) shredded cheddar cheese
• 1/2 cup (60g) shredded mozzarella cheese
• 2 green onions, sliced (for garnish)

📋 Instructions

1. 1Preheat and prep — Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish with butter or nonstick spray.
2. 2Cook sausage and veggies — In a large skillet over medium-high heat, cook the sausage, breaking it into crumbles, until browned, about 5-7 minutes. Add the onion and bell pepper, and cook until softened, about 3 minutes more. Drain excess fat if needed. Spread the mixture evenly in the prepared dish.
3. 3Scatter hash browns — Evenly distribute the thawed hash browns over the sausage mixture. Press down gently.
4. 4Whisk egg mixture — In a large bowl, whisk together the eggs, milk, salt, and pepper until well combined. Pour the mixture over the casserole, ensuring it covers evenly.
5. 5Top with cheese — Sprinkle the cheddar and mozzarella cheeses over the top.
6. 6Bake to perfection — Bake for 35-40 minutes, or until the edges are golden brown and the center is set (a knife inserted into the middle comes out clean). The internal temperature should reach 160°F (71°C).
7. 7Rest and garnish — Let the casserole rest for 10 minutes before slicing. Garnish with green onions if desired.

👨‍🍳 Chef's Note: If you're short on time, you can skip the bell pepper and onion – the casserole will still be delicious.

Servings: 8

Cuisine: American

Course: Breakfast/Brunch

Nutrition (per serving): 285 kcal · 17g protein · 12g carbs · 18g fat

Written by Maya Chen

Maya writes about sustainable living and zero-waste practices, focusing on small, actionable changes for everyday life. She shares practical tips from her own experiments in reducing plastic and food waste.