Overnight Breakfast Casserole with Bacon | Easy Easter Brunch Menu Ideas For A Crowd

The kind of morning where everyone wakes up hungry, the coffee is brewing, and the house smells like something magical is already in the oven—that’s exactly where this overnight breakfast casserole shines.

Picture this: you prepped everything the night before, tucked it into the fridge, and now all that’s left is popping it into the oven while you sip your coffee in peace. No stress, no chaos—just a warm, savory dish packed with crispy bacon, tender spinach, and melty cheese waiting to impress.

This dish has become a go-to favorite for holidays and gatherings, especially when planning Easter Brunch Menu Ideas For A Crowd. It’s hearty, comforting, and feels just fancy enough without requiring a chef-level effort. Whether you're hosting family or just want something special, it fits right into your list of Easter Brunch Lunch Ideas.

What makes it truly special is the flavor layering. Starting with a good loaf of crusty bread—sourdough being the ultimate winner—creates the perfect base. Slightly stale bread works like a sponge, soaking up that rich egg custard and turning into something irresistibly soft and golden.

Then comes the bacon. Oh, the bacon. Cooking the onions in that savory bacon grease transforms them into something silky, slightly sweet, and deeply flavorful. Toss in fresh spinach, and suddenly you’ve got a balance of indulgence and freshness that makes this one of the best Simple Brunch Buffet Ideas you can serve.

Want to make it even more eye-catching? Layer the spinach and bacon right on top before baking. It creates a festive look that’s perfect for spring gatherings—ideal for Breakfast Brunch Buffet Ideas that need a little visual wow factor.

And let’s not forget the cheese—because one type is never enough. A combination of sharp cheddar and Swiss gives this casserole depth, creaminess, and just the right amount of tang.

Whether you're planning Easy Easter Buffet Ideas or simply looking for reliable Easter Meal Ideas Brunch Food, this casserole checks every box: easy, delicious, make-ahead friendly, and guaranteed to disappear fast.

Overnight Breakfast Casserole with Bacon

Prep Time: 25 mins
Cook Time: 40 mins
Chill Time: 8 hours
Total Time: 9 hours 5 mins
Servings: 8

Ingredients

• 12 oz bacon
• 1 medium onion, chopped
• 2 garlic cloves, minced
• 5 cups fresh spinach
• 8 eggs
• 2 cups half and half
• 1/2 tsp salt
• 1/2 tsp black pepper
• 1 tbsp chopped chives
• 8 cups bread cubes (day-old sourdough recommended)
• 1 cup Swiss cheese, shredded
• 1 cup cheddar cheese, shredded

Instructions

1. Cook bacon until crispy, then set aside and crumble.
2. Keep a bit of bacon grease and sauté onions until soft.
3. Add garlic and spinach, cooking until wilted.
4. Whisk eggs, half and half, salt, pepper, and chives.
5. Layer bread cubes in a greased baking dish.
6. Add cheese, veggies, and bacon.
7. Pour egg mixture evenly over top.
8. Top with remaining cheese.
9. Cover and refrigerate overnight.
10. Bake at 350°F (175°C) for 35–40 minutes until golden.

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