High Protein Egg Casserole

The smell of smoked paprika hitting warm eggs on a Sunday morning is enough to make anyone rethink their cereal habit. I threw this casserole together after a particularly brutal gym session when my fridge held nothing but eggs, leftover chicken, and half a wilted bag of spinach. What came out of the oven forty minutes later was the kind of breakfast that makes you sit down and actually eat instead of standing over the sink. It has been on repeat ever since, with minor tweaks depending on what needs using up.

I brought a tray of this to a friends post hike brunch and watched three grown athletes fight over the last corner piece. That corner piece, by the way, is always the best because the edges go slightly crispy and the cheese caramelizes just enough to be irresistible.

Ingredients

• 8 large eggs: The backbone of the whole dish, so grab the best quality you can find since they carry the flavor.
• 1 cup cottage cheese: Low fat or regular both work, and it melts into the eggs so picky eaters will never notice it is there.
• 1 cup shredded cooked chicken breast or turkey sausage: Leftover rotisserie chicken is perfect here, or crumble turkey sausage if you want more punch.
• 1 cup shredded reduced fat cheddar cheese: Saves a few calories but still delivers that golden, bubbly top everyone reaches for.
• 1 cup chopped spinach: Fresh or frozen both work, but if using frozen you must squeeze it dry or the casserole turns soggy.
• 1/2 cup diced bell peppers: Any color adds sweetness and a nice crunch that survives baking.
• 1/2 cup finely chopped red onion: Finely is the key word here so no one gets a harsh raw onion bite.
• 1/2 teaspoon salt: Eggs need salt more than people think, and this amount is just right without overpowering.
• 1/4 teaspoon black pepper: A light hand lets the other seasonings shine through.
• 1/2 teaspoon garlic powder: Distributes garlic flavor evenly without burning like fresh garlic can in the oven.
• 1/2 teaspoon smoked paprika: This is the secret weapon that makes the whole kitchen smell incredible.
• 1 tablespoon olive oil or nonstick cooking spray: Just enough to coat the dish and guarantee clean slices every time.

Instructions

Preheat and prep the pan:

Set your oven to 375 degrees and generously coat a 9 by 9 baking dish with olive oil or spray. Listen for the quiet sizzle when the pan is ready and you will know the coating is even.

Whisk the base:

Crack all eight eggs into a large bowl, add the cottage cheese, and whisk aggressively until the mixture looks relatively smooth and no large curds remain.

Fold in everything else:

Add the chicken or sausage, cheddar, spinach, peppers, onion, salt, pepper, garlic powder, and smoked paprika, then stir gently until the whole bowl looks colorful and evenly mixed.

Pour and spread:

Transfer the mixture into your prepared dish and use a spatula to nudge it into the corners so every slice is equally loaded.

Bake until golden:

Slide it into the oven for about 35 minutes, and you will know it is done when the center is set and the edges have turned a gorgeous golden brown.

Rest before slicing:

Give it five minutes to cool and settle, which makes cutting cleaner and prevents the slices from falling apart on the plate.

Save

There is something deeply satisfying about pulling a whole baked casserole out of the oven when the house is still quiet and the coffee is fresh. It transforms a scattered morning into something that feels intentional and cared for.

Making It Your Own

Once you have the base down, this recipe is endlessly forgiving and welcomes whatever is lingering in your crisper drawer. Chopped sun dried tomatoes add a tangy chewiness, crumbled feta brings a briny edge, and fresh basil or chives scattered on top right before serving make it taste like something from a cafe.

Storage and Reheating

Leftovers keep beautifully in the fridge for up to four days, and individual slices reheat in about ninety seconds in the microwave without getting rubbery. I often cut the whole pan into portions, wrap them individually, and grab one on my way out the door for a breakfast that actually fuels the morning.

Serving Suggestions

This casserole is hearty enough to stand alone, but a simple side salad or a slice of toasted sourdough turns it into a proper meal worth sitting down for.

• A dollop of salsa or hot sauce on top wakes up every flavor instantly.
• Pair it with fresh fruit for a lighter balance that still feels complete.
• Always let it rest those five minutes because patience here means prettier slices.

Save

Cook this once and it will earn a permanent spot in your weekly rotation. Trust the cottage cheese and let the oven do the work.

Recipe FAQs

→ Can I make this egg casserole ahead of time?

Yes, you can assemble the casserole the night before and refrigerate it unbaked. When ready to serve, bake as directed, adding a few extra minutes if baking from cold. Leftovers also reheat beautifully in the microwave.

→ What vegetables work best in this casserole?

Spinach, bell peppers, and onions are excellent choices that cook down nicely. You can also add mushrooms, zucchini, broccoli, or tomatoes. Just be sure to squeeze excess moisture from watery vegetables before adding to prevent a soggy texture.

→ How do I know when the casserole is done baking?

The casserole is ready when the center is set and no longer jiggles when you gently shake the pan. The top should be lightly golden, and a knife inserted into the center should come out clean. This typically takes about 35 minutes at 375°F.

→ Can I freeze this casserole?

Absolutely. Bake the casserole completely, let it cool, then wrap tightly in plastic wrap and foil. Freeze for up to 3 months. Thaw overnight in the refrigerator and reheat in the oven at 350°F until warmed through.

→ What makes this casserole high in protein?

Each serving contains 8 eggs, cottage cheese, shredded chicken or turkey sausage, and cheddar cheese—all excellent protein sources. Together they provide 23 grams of protein per serving, making this a substantial and satisfying meal.

→ Is this casserole gluten-free?

Yes, all ingredients in this casserole are naturally gluten-free. However, always check labels on processed items like sausage and cottage cheese to ensure no gluten-containing additives or cross-contamination during manufacturing.