Cheesy Protein Egg Bake: High Protein Breakfast Casserole

Name: Cheesy Protein Egg Bake
Prep time: 10 min
Cook time: 35 min
Total time: 45 min
Cuisine: American
Ingredients: 8 large eggs; 1 cup whole milk; 1 cup shredded cheese (cheddar or mozzarella); 1 cup diced bell peppers (mixed colors); 1 cup fresh baby spinach; 1 tsp salt; 1/2 tsp black pepper; 1 tsp garlic powder; 1 tsp onion powder

By Maria Del

September 12, 2025

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A warm, cheesy aroma wafts through the air as you pull this Cheesy Protein Egg Bake High Protein Meal Prep Friendly Breakfast Casserole from the oven. Picture fluffy eggs combined with colorful veggies and a generous sprinkle of cheese that melts into gooey perfection, each bite bursting with flavor and comfort.

This breakfast casserole isn’t just a dish; it’s a morning hug that fuels your day. Whether you’re rushing to work or enjoying a slow Sunday brunch, this recipe is perfect for any occasion. It’s all about making mornings easier while tantalizing taste buds and filling bellies.

Why You'll Love This Recipe

This Cheesy Protein Egg Bake is quick to prepare, making meal prep a breeze
Its savory flavor profile combines fresh vegetables and cheese for a delicious start to your day
The vibrant colors make it visually appealing and perfect for serving at family gatherings
Enjoy it hot or cold, making it versatile enough for any meal

I remember the first time I made this casserole for my family; their eyes lit up with excitement. It quickly became our go-to breakfast dish.

Recipe preparation

Essential Ingredients

Here’s what you’ll need to make this delicious dish:

Eggs: Fresh eggs are essential for fluffiness; I suggest using organic if possible for better flavor.
Shredded Cheese: Choose your favorite blend; cheddar or mozzarella works beautifully in this recipe.
Bell Peppers: Pick a mix of red, green, and yellow for color and sweetness; they add fantastic crunch.
Spinach: Fresh spinach adds great nutrition; opt for baby spinach for a milder taste.
Milk: Use whole milk for richness; it helps create that creamy texture we all adore.
Salt and Pepper: Essential seasonings to enhance the flavors; adjust according to your taste preference.
Onion Powder: A pinch of this adds depth without the hassle of chopping onions.
Garlic Powder: Just a sprinkle brings out robust flavors that make every bite irresistible.

The full ingredients list, including measurements, is provided in the recipe card directly below.

Let’s Make it together

Prep Your Oven and Pan: Preheat your oven to 375°F (190°C). Grease a 9×13 inch baking dish with nonstick spray so nothing sticks during baking.

Whisk the Eggs Together: In a large bowl, crack 8 eggs and whisk them vigorously until well combined. Add 1 cup of milk and continue whisking until frothy.

Add Vegetables and Seasonings: Mix in diced bell peppers and spinach along with salt, pepper, garlic powder, and onion powder. Make sure everything is evenly distributed.

Stir in the Cheese: Fold in 1-2 cups of shredded cheese gently into the egg mixture. You want those cheesy pockets throughout the casserole!

Pour Mixture into Baking Dish: Transfer your egg mixture into the greased baking dish. Ensure it’s spread evenly without overfilling to avoid spills when rising.

Bake Until Golden Brown: Place the dish in your preheated oven and bake for about 30-35 minutes or until golden brown on top and set in the center.

Now you have an incredible Cheesy Protein Egg Bake High Protein Meal Prep Friendly Breakfast Casserole ready to enjoy! Let it cool slightly before slicing into squares.

This delightful breakfast casserole is not just delicious but also incredibly versatile. Feel free to mix different vegetables or swap cheeses based on your preferences! Enjoy sharing this recipe with friends or simply savor it solo on those busy mornings when you need that little extra boost to kickstart your day.

You Must Know

This cheesy protein egg bake is not just a breakfast; it’s a versatile meal prep hero
It’s packed with flavor and can be customized based on leftovers, making mornings deliciously easy
The aroma of baked eggs and cheese will wake up your senses

Perfecting the Cooking Process

Start by whisking eggs thoroughly before adding other ingredients to ensure even cooking. Bake it at 375°F for about 30-35 minutes until golden and set. This sequence maximizes flavor and texture.

Serving and storing

Add Your Touch

Feel free to swap in your favorite vegetables or add a handful of cooked bacon or sausage for extra protein. Experiment with different cheeses for unique flavors that cater to your taste buds.

Storing & Reheating

Store the egg bake in an airtight container in the fridge for up to 5 days. To reheat, simply pop it in the microwave for about 1-2 minutes, or until warmed through.

Chef's Helpful Tips

Use fresh eggs for the best flavor and fluffiness
Avoid overcooking to maintain a tender texture and check doneness with a toothpick before removing from the oven
Pair it with toast or fruit for a balanced breakfast

I remember making this cheesy protein egg bake for a brunch gathering, and my friends couldn’t stop raving about it. Their delighted faces made all the chopping worth it!

FAQs

FAQ

Can I make this casserole ahead of time?

Yes, you can prepare it the night before and refrigerate overnight before baking.

What vegetables work best in this recipe?

Spinach, bell peppers, and mushrooms are great choices to enhance flavor and nutrition.

How do I know when it’s done baking?

The center should be set and no longer jiggly; a toothpick inserted should come out clean.

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