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    Home » Breakfast

    Easy Baked Denver Omelet Breakfast Casserole

    By Jill Baird · Published July 19, 2021 · Updated October 11, 2022 · 6 Comments

    baked denver omelet recipe

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    This Baked Denver Omelet is perfect for busy mornings!  It's hearty, delicious, and can be ready on the table in no time.  Just like the traditional Denver omelet, it’s chock full of ham, green peppers, onions, and cheese, only baked casserole style making it a simple no-fuss breakfast for any occasion.

    Jump to:
    • Denver Omelet Casserole
    • Why is it Called a Denver Omelet?
    • Baked Denver Omelet Ingredients
    • How to Make a Baked Denver Omelet
    • Can You Make a Baked Denver Omelet Ahead of Time?
    • Breakfast Casserole Variations
    • Baked Denver Omelet Recipe

    Denver Omelet Casserole

    Whether you are making breakfast for a large group or a small family, this is the absolute best egg casserole, or “egg bake.”  It’s made with all of the same ingredients that you would find in an omelet - eggs, milk, cheese, filling and seasoning - only it’s baked in a baking dish.  No need to spend the morning flipping individual omelets over a hot stove!

    Once you’ve tried this recipe, feel free to swap out or add additional fillings, cheese and seasoning and see what you can come up with.  Serve your Baked Denver Omelet with hash browns, a green salad or fresh fruit, then sit back and enjoy. 

    If you love baked egg dishes, be sure to try my Ham and Cheese Quiche, this Spinach and Feta Quiche, or this amazing Sausage Egg Casserole.

    denver omelet casserole, baked in a glass baking dish

    Why is it Called a Denver Omelet?

    There is a lot of speculation here and really just best guesses.  Some people think that the Denver omelet (or the “Western Omelet”) came from a sandwich called the Denver Sandwich which was filled with the same ingredients - green bell peppers, ham, onions and cheese.  

    Other historians believe it originated from a dish made by Chinese immigrants who were working on the railroads out West.  The thought is that a version of egg foo young was possibly eaten between two slices of bread so that it could be taken on the go.

    ingredients for baked denver omelet

    Baked Denver Omelet Ingredients

    • Butter - you can use either salted or unsalted butter for this recipe.  If you use salted, you may need to reduce the added salt slightly, depending on your taste.
    • Onion - we recommend using white or yellow onions.
    • Green Pepper - this is traditional, but you could use orange, yellow or red instead.
    • Eggs - any type of large egg will work.
    • Milk - we recommend using either whole or 2% milk, or even heavy cream.
    • Salt and Pepper
    • Ham - any type of cooked ham will work. Leftover ham from the holidays works great for this recipe and deli ham works great too. 
    • Shredded Cheese - cheddar is traditionally found in a Denver omelet, but the next best thing would be Pepper Jack or mozzarella.  A little goat cheese or feta would also taste amazing!
    how to make a denver omelet breakfast casserole.

    How to Make a Baked Denver Omelet

    1. Saute veggies. It's best to saute vegetables before adding them to the egg mixture so they're soft and cooked all the way through.  
    2. Make the egg mixture.  You can mix these by hand, in a blender, or a hand mixer before adding the diced ham and shredded cheese.
    3. Pour into baking dish.  Spray the baking dish with non-stick cooking spray to make clean up a little easier, then add the sautéed onions and peppers evenly over the bottom.  Pour the egg mixture over the onion mixture and gently stir to combine. 
    4. Bake.  Bake in a preheated oven for 25-30 minutes, or until the edges are golden brown and the eggs in the middle of the baking dish are set. You can give the pan a little jiggle and the casserole doesn't wiggle. 
    5. Serve.  Remove from the oven and let cool for a few minutes before slicing.  Serve with a dollop of sour cream, diced tomatoes and avocados if desired.  Enjoy!
    baked egg casserole, baked denver omelet, easy breakfast casserole

    Can You Make a Baked Denver Omelet Ahead of Time?

    Yup - there are even multiple ways to do this!  If you want to do some of the prep beforehand and still want to serve it freshly baked, you can cook the peppers and onions ahead of time and store in an airtight container.  The next day, remove from the fridge and prep the rest of the recipe as directed.

    Otherwise, here are a couple more options:

    • Refrigerate: you can cover with plastic or aluminum foil and store in the fridge for up to 3 days.  If there is only a small portion left, transfer to an airtight container.
    • Freeze: we don’t recommend freezing this omelet, but it is possible.  Make sure you wrap it tightly with plastic wrap, then a layer of aluminum foil and store for up to 1 month.
    • Reheating: if you need to thaw, simply transfer to the fridge overnight.  You can either reheat in the microwave for 30 seconds at a time, or warm in a preheated 350 degree oven for about 10-15 minutes, or until warmed through.
    denver omelet casserole recipe

    Breakfast Casserole Variations

    As with any type of egg casserole, this Baked Denver Omelet is simple to customize.  Here are a few ideas for simple ingredient substitutions, toppings and more:

    • Ingredient Substitutions: trying using shredded mozzarella or Pepper Jack instead of cheddar, bacon instead of ham and/or heavy cream in place of milk.
    • Toppings: chives, green onions, guacamole, salsa, pico de gallo, or even sausage gravy.
    • Extra Seasoning: try with a pinch of cayenne, paprika, cumin or red pepper flakes.
    • Vegetarian: mix the ham and fill with sautéed mushrooms and spinach instead.
    baked denver omelet recipe
    Print

    Baked Denver Omelet Recipe

    This Baked Denver Omelet is hearty, delicious and can be ready on the table in no time.  Just like the traditional Denver omelet, it’s chock full of ham, green peppers, onions and cheese, only baked casserole style making it a simple no-fuss breakfast for any occasion.
    Course Breakfast
    Cuisine American
    Prep Time 15 minutes
    Cook Time 25 minutes
    Total Time 40 minutes
    Servings 8 people
    Calories 178kcal
    Author The Carefree Kitchen

    Ingredients

    • 2 Tablespoons Butter
    • ½ cup Onion diced, white or yellow
    • ½ cup Green Pepper diced
    • 8 large Eggs Raw Eggs
    • ¼ cup Water
    • ⅛ teaspoon Salt
    • 1 pinch Pepper
    • 1 cup Ham cut into ½" pieces
    • ½ cup Shredded Cheddar Cheese

    Instructions

    • Preheat oven to 400 degrees.
    • In a medium-sized saute pan over medium-high heat, melt the butter then add the diced onions and bell peppers. Saute until translucent, or about 5 minutes, then remove from the heat and set aside.
    • In a large bowl, add the eggs, water, salt and pepper and beat with a whisk or fork to break up the eggs and combine. Add in the diced ham and shredded cheese and stir to combine.
    • Spray a 9" x 13" baking dish with non-stick cooking spray, then add the sautéed onions and peppers evenly over the bottom. Pour the egg mixture over the onion mixture and gently stir to combine.
    • Bake in a preheated oven for 25-30 minutes, or until the edges are golden brown and the eggs in the middle of the baking dish are set.
    • Remove from the oven and let cool for a few minutes before slicing. Serve with a dollop of sour cream, diced tomatoes and avocados if desired. Enjoy!

    Nutrition

    Calories: 178kcal | Carbohydrates: 2g | Protein: 12g | Fat: 13g | Saturated Fat: 6g | Trans Fat: 1g | Cholesterol: 213mg | Sodium: 388mg | Potassium: 168mg | Fiber: 1g | Sugar: 1g | Vitamin A: 475IU | Vitamin C: 8mg | Calcium: 93mg | Iron: 1mg

    Here are some more baked egg breakfast recipes that we love!

    • Sausage Egg Biscuit Casserole
    • Bacon and Asparagus Quiche
    • Tater Tot Breakfast Casserole
    • 3 Cheese and Pesto Quiche
    • Potato Crust Quiche with Ham and Bacons
    • More Egg Recipes

    More breakfast recipes you'll love.

    • Double Chocolate Chip Muffins
    • Breakfast Pizza Recipe
    • Apple Monkey Bread
    • Strawberries French Toast Bake
    • Applesauce Muffins
    • More Breakfast Recipes
    • More Quick Bread Recipes
    • Best Brunch Recipes

    If you’ve tried this recipe, please rate it and leave a comment on this post. I love hearing feedback from you helps me and other readers too! If you love Pinterest,  feel free to leave a comment and photo there too.  Also, if you like to share, use the hashtag #thecarefreekitchen on Instagram and tag me @thecarefreekitchen so I can find you and give your post some love. You can also find me on Facebook at The Carefree Kitchen. Thank you!!

    Baked Denver Omelet casserole recipe
    What is a Denver omelet?

    It is believed this breakfast classic was created by cooks from the American West or the Chinese railroad. It was originally served on bread as a sandwich but at some point, a breadless version was developed and it became known as the Denver or Western Omelet.

    What’s in a Denver omelet?

    Denver omelet and Wester omelet are interchangeable. Most restaurants have their own spin on the classic but are generally made up of the same main ingredients, eggs, ham, onions, and green peppers.

    Should I use milk or eggs in omelets?

    It’s best to use water in omelets instead of milk. Milk makes your omelet watery since it will not blend with the eggs. Water blends and helps to keep the omelet high.

    No need to spend the morning flipping individual omelets over a hot stove with this Baked Denver Omelet.  It's hearty, delicious, filled with ham, green peppers, onions, and cheese, and can be ready on the table in no time.

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    Reader Interactions

    Comments

    1. Beth

      July 19, 2021 at 2:42 pm

      What a quick, easy, and tasty way to enjoy an omelet! Who has time in the morning for all that flipping for an omelet - not me, so this is the best recipe for my lifestyle!

      Reply
      • Jill Baird

        July 21, 2021 at 8:58 am

        Yes, it's so easy to make and is great the next day as leftovers too!

        Reply
    2. Taryn

      July 19, 2021 at 2:29 pm

      I really liked this as a new twist on the egg bakes we normally make. It was very flavorful!

      Reply
      • Jill Baird

        July 21, 2021 at 8:58 am

        I'm so happy to hear you loved it!

        Reply
    3. Hanna

      July 19, 2021 at 5:58 am

      I just love a great Denver Omelet! I can't wait to try this Baked one for a family brunch we have this weekend! Thanks for all your great recipes!

      Reply
      • Jill Baird

        July 21, 2021 at 8:59 am

        You are welcome! Have a great family gathering!

        Reply

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