Irish Cheddar Breakfast Casserole

Name: Irish Cheddar Breakfast Casserole
Prep time: 15 min
Cook time: 40 min
Total time: 55 min
Yield: 8 servings
Ingredients: 8 slices of bread, cubed; 6 large eggs; 2 cups milk; 1 teaspoon salt; 1/2 teaspoon black pepper; 1 cup shredded Irish cheddar cheese; 1 cup cooked and crumbled bacon; 1/2 cup chopped green onions

Highlighted under: Instant Pot Recipes

I love starting my day with a smoky, savory breakfast that’s both hearty and satisfying, and this Irish Cheddar Breakfast Casserole does just that! The combination of rich Irish cheddar, crispy bacon, and fluffy eggs creates an indulgent dish that can be prepared in advance and baked fresh when needed. Perfect for brunch with friends or a cozy family breakfast, this casserole is sure to impress even the pickiest eaters. The best part? It comes together in no time, allowing me to enjoy the morning instead of stressing in the kitchen.

Created by

The Chefannaskitchen Team

Last updated on 2026-02-18T14:02:19.050Z

When I first made this Irish Cheddar Breakfast Casserole, I knew I was onto something special. The creamy texture of the egg mixture combined with the sharpness of the aged Irish cheddar creates an irresistible flavor that nobody can resist. I also love how the elements can be prepped the night before, making it a breeze to pop it in the oven just before serving.

One particular tip I've discovered is to allow the casserole to rest for about 10 minutes after baking. This helps set the ingredients and allows for easier slicing, creating beautiful portions that look as good as they taste. Trust me, it's worth the wait!

Why You'll Love This Recipe

Rich, creamy texture that satisfies every craving
The sharpness of Irish cheddar adds a unique twist
Perfectly balanced with crispy, smoky bacon

The Importance of Quality Ingredients

Using high-quality Irish cheddar is crucial for achieving the rich and creamy texture that defines this casserole. The sharpness of Irish cheddar not only enhances the overall flavor but also adds a satisfying dimension that complements the smoky bacon. When selecting your cheese, look for aged varieties with a firm texture and a bold flavor profile to ensure the best outcome. Freshly grated cheese melts better than pre-shredded, so take a moment to grate it yourself for maximum flavor and creamy consistency.

Similarly, the quality of your bacon can make a significant difference. Opt for thick-cut bacon for this recipe; it provides a delightful crunch and holds up better against the other substantial ingredients. Cooking your bacon until it's crispy allows it to maintain its texture even after baking, while also infusing the dish with its savory goodness. You can substitute turkey bacon or a non-pork alternative for a lighter version, though keep in mind that the flavor profile may differ slightly.

Make-Ahead and Storage Tips

One of the best features of this Irish Cheddar Breakfast Casserole is its make-ahead convenience. You can assemble the casserole the night before and keep it refrigerated. Just cover it tightly with plastic wrap to prevent any drying out. When you're ready to bake, remove it from the fridge and allow it to come to room temperature for about 30 minutes before placing it in the oven. This helps ensure even cooking without having to adjust the baking time significantly.

If you're considering leftovers, this casserole keeps well in the refrigerator for 3–5 days. To reheat, slice individual portions and warm them in the microwave or a preheated oven set to 350°F (175°C) until heated through, approximately 15-20 minutes. You can also freeze leftover casserole; just slice and wrap tightly before freezing. When you’re ready to eat, thaw overnight in the fridge and reheat as mentioned for a quick breakfast or brunch option.

Ingredients

For the Casserole

8 slices of bread, cubed
6 large eggs
2 cups milk
1 teaspoon salt
1/2 teaspoon black pepper
1 cup shredded Irish cheddar cheese
1 cup cooked and crumbled bacon
1/2 cup chopped green onions

Mix and match ingredients as you like!

Instructions

Prepare the Bread Base

Preheat your oven to 350°F (175°C). In a large mixing bowl, combine the cubed bread, crumbled bacon, and chopped green onions.

Make the Egg Mixture

In another bowl, whisk together the eggs, milk, salt, and black pepper until well combined.

Combine and Assemble

Pour the egg mixture over the bread mixture, ensuring every piece is coated. Add the shredded Irish cheddar cheese and mix gently.

Bake the Casserole

Transfer the mixture to a greased 9x13 inch baking dish. Bake in the preheated oven for 40 minutes or until the eggs are set and the top is golden brown.

Serve and Enjoy

Let the casserole rest for about 10 minutes before slicing. Serve warm, and enjoy the rich flavors!

This dish is great for breakfast or brunch!

Pro Tips

Feel free to add your favorite vegetables or substitute ham for bacon for variety!

Serving Suggestions

This casserole pairs beautifully with fresh fruit or a light salad, making it a well-rounded breakfast option. I like to add a side of avocado or a dollop of sour cream for a creamy contrast to the fluffy texture of the casserole. You could also serve it with a spicy salsa or hot sauce to elevate the flavor, especially for those who enjoy a kick in the morning.

For an extra boost of nutrients, consider adding spinach or kale to the egg mixture. This not only enhances the visual appeal but also adds a touch of moisture and a burst of freshness. Just make sure to sauté the greens briefly before adding them to remove excess water and prevent a soggy casserole.

Customize Your Casserole

Feel free to mix up the ingredients based on your preferences or dietary needs. You can swap in different cheeses like mozzarella or pepper jack for a variation in flavor or heat. Additionally, if you're not a fan of bacon or need to cater to specific diets, cooked sausage or a plant-based sausage can be used as an alternative that still offers a satisfying bite.

The beauty of this casserole lies in its versatility. You can incorporate diced bell peppers for sweetness or even mushrooms for an earthy flavor. Remember to chop vegetables evenly for consistent cooking, and if you include any moist ingredients, like tomatoes, sauté them first to mitigate moisture levels that could affect the casserole's texture.

Questions About Recipes

→ Can I make this casserole ahead of time?

Absolutely! You can assemble it the night before, store it in the fridge, and just bake it in the morning.

→ What can I serve with the casserole?

This dish pairs well with fresh fruit or a light salad for a balanced meal.

→ Can I freeze leftovers?

Yes, leftovers can be frozen. Just make sure to wrap them tightly in foil or an airtight container.

→ Is there a vegetarian version?

You can easily make this vegetarian by omitting the bacon and adding more vegetables like bell peppers or spinach.