Eggs Florentine Casserole: Perfect Make-Ahead Breakfast Recipe

Eggs Florentine Casserole is my secret weapon for stress-free mornings. It takes just 20 minutes of prep and delivers rich, cheesy goodness that’s perfect for any occasion. Whether you’re feeding a crowd for brunch or meal prepping for the week, this quick casserole is packed with flavor and minimal effort.

Traditional Eggs Florentine can take ages, with multiple pans and lots of fuss. Not this version—this easy Eggs Florentine casserole is a one-dish wonder that saves you time and energy. Once it’s baking, you’ve got 30 minutes to sip coffee or tackle your to-do list. Trust me, you won’t miss the extra work, and your family will be scraping their plates.

Why This Eggs Florentine Casserole Is a Game-Changer

• Time-saving: Traditional recipes can take up to an hour, but this one is ready in under an hour, start to finish.
• One-pan cleanup: Everything bakes in a single dish, meaning fewer dishes for you (you’re welcome).
• Make-ahead friendly: Prepping it the night before means you just pop it in the oven in the morning.
• Perfect for meal prep: Store leftovers in the fridge, and reheat for easy breakfasts all week.
• No waste: Use frozen spinach and canned options if you’re cleaning out the fridge.

Equipment You’ll Need for This Eggs Florentine Casserole

You don’t need fancy gadgets for this best spinach and egg casserole. Here’s what I recommend:

• 13×9-inch baking dish: Make sure it’s greased to avoid sticking.
• A large skillet: For browning the sausage and sautéing veggies.
• A whisk: It makes mixing the eggs and milk a breeze.
• An oven thermometer: Ensures your casserole hits the perfect 165°F doneness.

Want to save time? Use a skillet with high sides so you can easily transfer veggies without spills.

Simple Ingredients for Eggs Florentine Casserole

This recipe is all about combining wholesome ingredients with a few shortcuts. Here are the key players:

• Turkey sausage: A leaner option that adds hearty flavor. Swap with chicken sausage if you prefer.
• Frozen spinach: A time-saver, but if you’ve got fresh spinach on hand, sauté and drain it first.
• Swiss and cheddar cheeses: The blend of creamy Swiss and sharp cheddar is unbeatable, but feel free to experiment with your favorites.
• Eggs and milk: These are your base for a light, custardy texture. I use 2% milk, but whole milk works too for extra richness.

Pro tip: Pre-shredded cheese saves even more time. No judgment here.

Eggs Florentine Casserole Recipe Details

• Servings: 12 servings
• Prep: 20 min
• Cook: 30 min
• Total: Prep: 20 min. Bake: 30 min. + standing

Eggs Florentine Casserole Ingredients

• 1 pound bulk turkey sausage
• 2 tablespoons butter
• 1 large onion, chopped
• 1 cup sliced fresh mushrooms
• 1 package (10 ounces) frozen chopped spinach, thawed and squeezed dry
• 12 large eggs
• 2 cups 2% milk
• 1 cup shredded Swiss cheese
• 1 cup shredded sharp cheddar cheese
• 1/4 teaspoon paprika

How to Make Eggs Florentine Casserole

1. Preheat your oven to 350°F.
2. In a large skillet, cook the turkey sausage over medium heat until it’s no longer pink, about 6-8 minutes. Break it into crumbles as it cooks. Drain and transfer to a greased 13×9-inch baking dish.
3. Using the same skillet, melt the butter over medium-high heat. Add the chopped onion and sliced mushrooms, cooking for 3-5 minutes until tender. Stir in the spinach, and spoon the veggie mixture over the sausage in the baking dish.
4. In a large mixing bowl, whisk together the eggs and milk until well-blended. Pour this mixture evenly over the sausage and vegetables in the dish.
5. Sprinkle the shredded Swiss cheese, cheddar cheese, and a dash of paprika across the top.
6. Slide the dish into the oven and bake uncovered for 30-35 minutes, or until the center is set and a thermometer reads 165°F.
7. Let the casserole rest for 10 minutes before serving. This will make slicing easier and ensure the flavors meld beautifully.

Jake’s Tips for the Best Eggs Florentine Casserole

• Assemble ahead: Prep everything the night before, cover, and refrigerate. Just bake it fresh in the morning!
• Drain the spinach well: Excess water will make your casserole runny. Squeezing it in a clean kitchen towel works wonders.
• Let it rest: Don’t skip the 10-minute resting period before cutting—it makes a world of difference.
• Fresh mix-ins: Toss in diced bell peppers, green chiles, or leftover cooked veggies.
• Storage: Store leftovers in an airtight container in the fridge for up to 4 days. Reheat slices in the microwave or oven.
• Double batch for meal prep: Cook two casseroles and freeze one for a busy weeknight rescue.

Easy Eggs Florentine Casserole Variations

• Vegetarian option: Skip the sausage and double up on the veggies—broccoli and zucchini are great additions.
• Low-carb twist: Replace the milk with heavy cream and use fewer mushrooms for keto-friendly goodness.
• Italian-inspired: Substitute Italian sausage and sprinkle with Parmesan or mozzarella cheese.
• Tex-Mex style: Add diced green chiles, taco seasoning, and pepper jack cheese for a spicy upgrade.

Eggs Florentine Casserole FAQs

Can I make this casserole ahead of time?

Absolutely! Assemble everything the night before, cover, and refrigerate. Bake as directed the next morning.

What’s the best way to reheat leftovers?

Microwave individual portions for 1-2 minutes, or reheat the whole dish in the oven at 350°F until warmed through.

Can I use fresh spinach instead of frozen?

Yes, just sauté it first to remove excess moisture. You’ll need about 4-5 cups of fresh spinach to equal one 10-ounce package of frozen.

Can I freeze this casserole?

Yes! Let the baked casserole cool completely, then wrap it tightly in plastic wrap and foil before freezing. Thaw overnight in the fridge and reheat in the oven.

What substitutions work for the cheeses?

If you’re out of Swiss or cheddar, try gruyère, colby jack, or even mozzarella for different flavor profiles.

There you have it—your ultimate guide to making a stress-free, delicious Eggs Florentine Casserole. What’s your favorite breakfast casserole hack? Let me know in the comments—I’d love to hear your ideas!