This Golden Potatoes O’Brien Breakfast Casserole is the perfect way to start your day! It’s filled with crispy potatoes, fluffy eggs, and tasty veggies, all baked together until golden brown.
You can whip it up the night before, so it’s ready to bake in the morning. Plus, who wouldn’t want a delicious breakfast waiting for them? It’s like a warm hug for your tummy! 🥔❤️
Key Ingredients & Substitutions
Frozen Golden Potatoes O’Brien: These are key for the casserole’s flavor. If you prefer, you can use fresh diced potatoes mixed with bell peppers and onions. This gives a fresher taste but will take a little longer to prepare.
Eggs: Large eggs are standard, but you can use egg substitutes or egg whites for a lighter version. I personally love the fluffiness that whole eggs bring!
Cheddar Cheese: Sharp cheddar is my favorite for its bold flavor. However, feel free to substitute with Monterey Jack or pepper jack for a little spice! You can also try a dairy-free cheese if you’re going vegan.
Milk: Whole milk adds creaminess, but you can use 2% or non-dairy alternatives such as almond, oat, or soy milk.
What’s the Best Way to Ensure Eggs Cook Evenly?
Getting the eggs just right is crucial in this casserole. To ensure they cook evenly, take a few simple steps:
- Whisk the eggs thoroughly with milk and seasonings until well blended. This helps distribute the flavors.
- Let the casserole mixture rest for a few minutes before baking. This allows the potatoes to soak up some of the egg mixture.
- Keep an eye on the casserole while it bakes. Ovens can vary, so check for a golden top and set eggs at the 40-minute mark.
Following these tips will help you create a perfectly cooked, delicious breakfast casserole every time!

Golden Potatoes O’Brien Breakfast Casserole Morning Magic
Ingredients You’ll Need:
For the Casserole:
- 4 cups frozen Golden Potatoes O’Brien (diced potatoes with red and green peppers and onions)
- 8 large eggs
- 1 cup shredded sharp cheddar cheese
- 1 cup whole milk
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 1/4 teaspoon garlic powder (optional)
- 1/2 teaspoon onion powder (optional)
- 2 tablespoons butter or cooking spray (for greasing the baking dish)
- Fresh parsley, chopped (for garnish)
How Much Time Will You Need?
This delightful breakfast casserole takes about 15 minutes to prepare and 40-45 minutes to bake. A total of about 1 hour, including cooling time, to create a breakfast masterpiece that everyone will love!
Step-by-Step Instructions:
1. Get Your Oven Ready:
First, preheat your oven to 350°F (175°C). While it’s warming up, grab a 9×9 inch baking dish and grease it with butter or cooking spray to make sure nothing sticks!
2. Layer the Potatoes:
Next, spread the frozen Golden Potatoes O’Brien evenly across the bottom of your prepared baking dish. This colorful layer will be the base of your casserole!
3. Whisk It Up:
In a large bowl, whisk together the eggs, milk, salt, black pepper, garlic powder, and onion powder. Mix until everything is well combined and looks smooth!
4. Add Cheese and Egg Mixture:
Sprinkle half of the shredded cheddar cheese over the layer of potatoes in the baking dish. This will give the casserole a delicious cheesy flavor. Then, pour the egg mixture evenly over the potatoes and cheese.
5. Top It Off:
Now, it’s time to add the rest of the cheese! Sprinkle the remaining shredded cheddar cheese over the top. This will create a wonderfully golden crust as it bakes.
6. Bake to Perfection:
Place the casserole uncovered in your preheated oven and bake for about 40-45 minutes. Keep an eye out for that perfect golden brown top, and make sure the eggs are set before you take it out!
7. Cool and Garnish:
Once it’s baked, carefully remove the casserole from the oven and let it cool for about 5 minutes. Then, sprinkle some fresh chopped parsley on top for a pop of color and freshness!
8. Serve and Enjoy:
Cut into generous squares and serve warm. It pairs wonderfully with fresh fruit and a hot cup of coffee for a delightful breakfast experience!
This hearty casserole combines the classic flavors of Potatoes O’Brien with eggs and cheese for a perfect morning “magic” dish that everyone will love!
Can I Use Fresh Potatoes Instead of Frozen?
Absolutely! If you prefer fresh potatoes, simply peel and dice them, then sauté in a little oil with diced onions and bell peppers until tender before layering them in the baking dish. This will add a fresh flavor to the casserole!
Can I Make This Casserole Ahead of Time?
Yes, you can! Assemble the casserole the night before, cover it with plastic wrap, and refrigerate. In the morning, just remove it from the fridge and bake as directed. This way, it’s ready in no time!
What Should I Do with Leftover Casserole?
Store any leftovers in an airtight container in the refrigerator for up to 3 days. Reheat in the microwave or oven until warmed through. It makes for a quick breakfast or snack!
Can I Add Other Ingredients to This Casserole?
Definitely! Feel free to add cooked sausage, bacon, or a variety of veggies like spinach or mushrooms to customize your casserole. Just make sure not to overload it, as it can affect cooking time and texture.



