Easy Fluffy Oven-Baked Omelet Casserole

This fluffy Oven-Baked Omelet Casserole is the easiest way to make a Denver omelet. It contains protein-packed eggs, tender ham, fresh bell peppers, and wholesome mushrooms. It is perfect for breakfast, brunch, or supper. Make this ahead of time and store it in the fridge for a quick breakfast on busy mornings; perfect for back to school. It takes less than 15 minutes to prep, then pop it in the oven to bake. Set the timer and forget it. Plus, it tastes SO good.

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This breakfast egg casserole is such an EASY way to prepare eggs. It doesn't get any easier, plus it's healthy, high in protein, and low in carbs.

This is a healthy breakfast idea that you should keep in mind when you are pressed for time. It can easily be adjusted to make for a larger or smaller crowd.

This Western egg casserole is filling and satisfying. It bakes up to a puffy, golden casserole that your whole family will love. Eat it as is, or put it inside a wrap for a healthy breakfast.

Plus, you don't have to stand at the stove waiting for it to cook like you do when cooking a regular omelet.

For a traditional omelet, try my Spinach Mushroom Omelette With Feta Cheese. And for another easy breakfast casserole, try my Baked Overnight Eggnog French Toast Casserole with Streusel Topping.

Jump to:

• 🧡 Why You Will Love This Recipe
• 🥘 Ingredients
• 🍳 Instructions
• 💭 Expert Tips
• 📖 What else can you put in an omelet?
• 🥗 Side dishes
• 🥞 More Breakfast Recipes
• ❓ FAQs
• 👪 More Easy Recipes You'll Love
• 📋 Recipe
• 💬 Comments

🧡 Why You Will Love This Recipe

• Convenient: This fluffy omelet is perfect for busy mornings. You can make it ahead of time and store it in the fridge, then reheat it quickly for a delicious and nutritious breakfast.
• Easy to make: This Denver omelet casserole is incredibly easy to make, with less than 15 minutes of prep time. Simply mix together the ingredients and pop it in the oven to bake.
• Protein-packed: Eggs and ham are excellent sources of protein, making this dish a great choice for those looking to increase their protein intake.
• Delicious: The combination of fluffy eggs, ham, fresh bell peppers, and mushrooms creates a flavorful dish that your whole family will love.
• Versatile: This healthy breakfast casserole can be served for breakfast, brunch, or supper.
• Meal prep: Once cooled, transfer individual servings into an airtight container and store them in the refrigerator for up to 4 days. To reheat, simply microwave the individual servings for 30-60 seconds or until heated through.

🥘 Ingredients

If these simple ingredients are not already in your kitchen, they can be easily found at your local grocery store.

• Eggs. I used large eggs, including the egg yolks. Eggs have so many health benefits. For instance, eggs have more nutrients -- such as vitamins, minerals, and amino acids -- per calorie than most other foods, are high in protein, help your good cholesterol and lower triglycerides, lower your chance of having a stroke, are heart-healthy, help your eyes, and sharpen your brain.
• Milk. I used 1% milk, but you can use almond milk, coconut milk, or oat milk.
• Shredded cheese. I used white cheddar cheese, but you can use your favorite kind. It would be great with sharp cheddar cheese, gouda, swiss, mozzarella, or even feta.
• Diced ham. Ham goes great in an omelet; just make sure it is already pre-cooked. You can use leftover Baked Ham or leftover Double Smoked Ham. You could also use Air Fryer Bacon, thinly sliced cooked steak, Air Fryer Sausage, Smoked Sausage, leftover chicken from Air Fryer Chicken Thighs, Air Fryer Chicken Breasts, Instant Pot Chicken Breasts, Smoked Chicken Breasts or Smoked Chicken Thighs, or even Smoked Salmon.
• Mushrooms and bell peppers: (I used orange peppers, but you could also use green bell peppers, or red peppers. You can also use spinach, tomatoes, and leeks. Look in your fridge and use up anything that you have sitting in the crisper.

This baked omelet casserole is easy to modify to suit your tastes. Are you a vegetarian? Leave out the meat. Do you want to make it healthier? Add more vegetables. The sky is the limit for what you can do with this baked oven omelet.

See the printable recipe card for exact measurements and a complete list of ingredients.

🍳 Instructions

This oven-baked omelet is very easy to make and takes very little prep time.

First of all, preheat the oven to 350 degrees F.

Next, whisk together the eggs in a large bowl. You can also use a hand mixer if desired.

Next, add milk, seasoning salt, and black pepper. Whisk to combine.

Then, add the diced ham and shredded cheddar cheese.

Next, add the bell peppers and mushrooms. Stir to combine.

Finally, pour egg mixture into a greased 9 x 12 casserole dish.

Bake for 45 minutes at 350 degrees, until the top is golden brown and the eggs are set.

Cut the casserole into squares and serve.

Enjoy.

💭 Expert Tips

• Whisk the eggs well to ensure that they are fully combined and aerated. This will help create a light and fluffy texture.
• Use a casserole dish that is the appropriate size. If the dish is too large, the omelet may become dry and overcooked.
• Allow the omelet to rest for a few minutes before serving to help it set.
• Consider adding spinach, tomatoes, or onions to give the dish extra flavor and nutrition.
• Don't overcook the omelet. It should be slightly firm to the touch but still moist and tender.
• If using vegetables that release moisture, such as fresh mushrooms or tomatoes, consider sautéing them in a separate pan before adding them to the egg mixture. This will prevent the omelet from becoming watery.
• Store leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, microwave on high for 30 seconds to 1 minute, or until heated through.

📖 What else can you put in an omelet?

• Crisp bacon.
• Diced tomatoes or cherry tomatoes.
• Leeks.
• Fresh herbs.
• Spinach.
• Green onions.
• Garlic.
• Zucchini.
• Celery.

🥗 Side dishes

• Avocado.
• Fruit.
• Tomatoes.
• Hash browns.
• Crispy oven-roasted potatoes or hashbrowns.
• Salad.
• Air Fryer Toast.
• English muffin.
• Buttermilk Sheet Pan Pancakes.
• Baked Overnight Eggnog French toast.

🥞 More Breakfast Recipes

• Dutch Baby Pancake in Cast Iron Skillet
• Fluffy Banana Pancakes
• Baked Overnight Eggnog French Toast Casserole
• Spinach And Mushroom Omelet
• Instant Pot Hard-Boiled Eggs
• Homemade Buttermilk Sheet Pan Pancakes
• Crispy Buttermilk Belgian Waffles

❓ FAQs

👪 More Easy Recipes You'll Love

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