Easy Chicken & Spinach Egg Casserole

This chicken and spinach egg casserole is a wholesome, protein-rich breakfast that’s perfect for meal prep, family brunches, or even a quick weekday dinner. It features tender chicken, fluffy eggs, fresh spinach, and melted cheese baked into a light yet satisfying casserole. With simple ingredients and minimal prep, it’s a nutritious dish that’s both hearty and comforting.

What is Chicken & Spinach Egg Casserole?

A chicken and spinach egg casserole is a baked egg-based dish that combines shredded or diced chicken with spinach, cheese, and seasonings. It’s similar to a crustless quiche—high in protein, naturally low in carbs, and full of fresh flavor. This casserole is ideal for anyone who wants a balanced, make-ahead meal that’s easy to reheat and enjoy all week long.

Other Popular Breakfast Casserole Recipes

• Protein-Packed Tofu Breakfast Casserole
• Egg, Greek Yogurt & Veggie Bake
• Turkey Sausage and Egg White Casserole
• Sausage, Egg & Cottage Cheese Casserole

Reasons to Try Chicken & Spinach Egg Casserole

• Protein-packed meal – Great for keeping you full and energized.
• Simple to prepare – Quick prep and minimal ingredients.
• Meal prep friendly – Stores and reheats perfectly.
• Low-carb and gluten-free – Naturally fits healthy eating plans.
• Versatile dish – Enjoy it for breakfast, lunch, or dinner.

Ingredients Needed to Make Chicken & Spinach Egg Casserole

• 2 cups cooked chicken, shredded or diced (rotisserie chicken works great)
• 8 large eggs
• 1 cup milk (or almond milk for a lighter version)
• 1 ½ cups shredded mozzarella or cheddar cheese
• 2 cups fresh spinach (roughly chopped)
• 1 small onion, finely diced
• 2 cloves garlic, minced
• 1 teaspoon salt
• ½ teaspoon black pepper
• ½ teaspoon paprika (optional for color)
• 1 tablespoon olive oil or butter (for sautéing)
• 1 tablespoon butter (for greasing the baking dish)

Instructions to Prepare Chicken & Spinach Egg Casserole

Step 1: Preheat the oven

Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish with butter or non-stick spray.

Step 2: Sauté vegetables

In a skillet, heat olive oil over medium heat. Add diced onion and minced garlic, and cook for 2–3 minutes until fragrant. Add chopped spinach and cook until wilted. Remove from heat and set aside.

Step 3: Prepare egg mixture

In a large bowl, whisk together eggs, milk, salt, pepper, and paprika until well combined and slightly frothy.

Step 4: Assemble the casserole

Spread the cooked chicken evenly in the prepared baking dish. Add the sautéed spinach mixture over the chicken, then pour the egg mixture evenly across the top. Sprinkle shredded cheese over everything.

Step 5: Bake casserole

Bake uncovered for 35–40 minutes, or until the eggs are set and the top is lightly golden.

Step 6: Rest and serve

Let the casserole rest for 5–10 minutes before slicing. Garnish with extra spinach or herbs if desired and serve warm.

What Goes Well With Chicken & Spinach Egg Casserole

• Avocado slices – Add creamy richness to every bite.
• Whole-grain toast – Perfect for pairing with eggs and cheese.
• Fresh fruit salad – Brings balance with sweetness and freshness.
• Greek yogurt – Adds extra protein and a cool contrast.
• Coffee or green tea – Complements the savory flavors perfectly.

Key Tips for Making Chicken & Spinach Egg Casserole

• Use pre-cooked chicken – Speeds up prep time and ensures even cooking.
• Drain cooked spinach – Prevents excess moisture from making the casserole watery.
• Whisk eggs thoroughly – Helps achieve a fluffy, uniform texture.
• Let it rest before slicing – Keeps layers firm and intact.
• Add cheese last – Creates a beautifully golden crust.
• Experiment with seasoning – Try adding Italian herbs or red chili flakes.

Creative Variations of Chicken & Spinach Egg Casserole

• Keto version – Use heavy cream instead of milk for a richer, low-carb version.
• Veggie boost – Add mushrooms, bell peppers, or zucchini.
• Spicy twist – Mix in jalapeños or a touch of hot sauce.
• Cheese lovers’ version – Use a blend of cheddar, Swiss, and Parmesan.
• Mediterranean style – Add feta cheese and sun-dried tomatoes.

Storage Guidelines for Chicken & Spinach Egg Casserole

• Refrigerate leftovers – Store in an airtight container for up to 4 days.
• Freeze portions – Wrap slices tightly and freeze for up to 2 months.
• Cool completely before storing – Prevents condensation and sogginess.
• Label before freezing – Helps you track freshness.

Reheating Tips for Chicken & Spinach Egg Casserole

• Oven method – Warm at 325°F (160°C) for 15–20 minutes.
• Microwave option – Heat individual portions for 1–2 minutes.
• From frozen – Bake covered at 350°F (175°C) for 40–45 minutes until hot.

Nutritional Value (per serving):

• Calories: ~295
• Protein: 28g
• Carbohydrates: 4g
• Fat: 18g
• Fiber: 1g
• Sodium: 460mg

FAQs

Do you cook spinach before adding it to an egg casserole?

Yes, it’s best to cook or sauté spinach before adding it to an egg casserole. This helps remove excess water and prevents the casserole from turning watery as it bakes.

Can I use raw chicken in a chicken and spinach egg casserole?

No, the chicken should always be cooked before adding it to the casserole. Using pre-cooked or leftover chicken ensures the dish bakes evenly and remains safe to eat.

How do you keep an egg casserole from sticking to the dish?

Grease the baking dish thoroughly with butter or non-stick spray before adding the ingredients. You can also line it with parchment paper for easier cleanup.

Can I make this chicken and spinach egg casserole ahead of time?

Yes, you can assemble the casserole ahead of time, cover it tightly, and refrigerate it overnight. Bake it the next morning, adding 5–10 extra minutes since it starts cold.

Final Words

This chicken and spinach egg casserole is a nutritious, flavorful dish that’s as simple as it is satisfying. It’s ideal for meal prep, a quick breakfast, or a wholesome family brunch. With tender chicken, fresh spinach, and creamy cheese, this recipe delivers all the comfort of a classic casserole while keeping it light and healthy.

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