Savory Overnight Crock-Pot Breakfast Casserole for Lazy Mornings

Last Updated on February 12, 2026 by Antoni Recipes Team

There s nothing quite like waking up to the tantalizing smell of a warm breakfast waiting for you, is there? When I first discovered the magic of the Overnight Crock-Pot Breakfast Casserole, it was like finding the secret to a stress-free morning. With just a few minutes of prep the night before, I could set my slow cooker and drift off to sleep knowing a delicious, hearty breakfast would greet me come morning.

Imagine the combination of fluffy eggs, creamy sour cream, and vibrant veggies melding together, all topped with melty cheddar cheese. It s a dish that celebrates both comfort and convenience, making it perfect for lazy weekends or busy weekdays alike. Whether you re feeding a crowd or just indulging in a cozy breakfast for two, this casserole brings smiles and full bellies! So, let s dive into how you can create this delightful dish that transforms breakfast into a moment to relish.

Why love Overnight Crock-Pot Breakfast Casserole?

Convenience: Imagine waking up to a fully cooked breakfast without lifting a finger in the morning. This casserole is prepped the night before, saving you precious time.

Flavorful Layers: The combination of eggs, ham, and fresh veggies creates a delicious mix of flavors in every bite.

Crowd-Pleaser: Perfect for family gatherings or brunches, this hearty dish serves 6 to 8 people, ensuring no one leaves the table hungry.

Versatility: Feel free to customize it with your favorite ingredients! Swap the ham for bacon or add different types of cheese and vegetables to suit your taste.

Comforting: There s nothing like a warm, cheesy breakfast casserole to start your day off right, making it a feel-good meal for all occasions.

Embrace the ease and joy of cooking with this delightful breakfast recipe!

Overnight Crock-Pot Breakfast Casserole Ingredients

For the Egg Mixture
12 large eggs Essential for a fluffy base, providing protein and structure.
1 cup whole milk Adds creaminess; you can substitute with almond milk for a dairy-free option.
8 ounces sour cream Gives richness and a slight tang; Greek yogurt works well too.
2 teaspoons Dijon mustard Enhances flavor depth; try yellow mustard if that s what you have on hand.
1 teaspoon kosher salt Balances the flavors; adjust to your taste preference.
1/4 teaspoon freshly ground black pepper Adds a hint of spice; feel free to increase for more kick.

For the Casserole Base
Cooking spray Prevents sticking; olive oil can also be used for a healthier option.
2 cups frozen shredded potatoes No need to thaw; they provide a hearty texture.
8 ounces thick-cut deli ham Adds savory depth; substitute with turkey ham or leave it out for a vegetarian version.
1 medium bell pepper Freshens the dish with color and flavor; any color will do!
1 small red onion Complements the ham and veggies; use shallots for a milder taste.
2 cups baby spinach Boosts nutrition; kale can work for a different texture.

For the Topping
1 1/2 cups shredded sharp cheddar cheese Melts beautifully on top of the casserole; try pepper jack for a spicy twist.

Now that you have all your ingredients ready, let s make this delightful Overnight Crock-Pot Breakfast Casserole come to life!

How to Make Overnight Crock-Pot Breakfast Casserole

1. Whisk Together: In a large bowl, whisk the eggs, milk, sour cream, Dijon mustard, salt, and pepper until well combined. This creates a creamy base full of flavor.
2. Coat the Cooker: Generously spray a 6-quart slow cooker with cooking spray to prevent sticking. The right preparation ensures an easy cleanup later!
3. Combine Ingredients: Add the frozen shredded potatoes, diced ham, chopped bell pepper, chopped onion, spinach, and 1 cup of shredded cheese into the slow cooker. Give it a gentle stir to mix everything evenly.
4. Add Egg Mixture: Pour the prepared egg mixture over the layered ingredients in the slow cooker. Stir to ensure everything is well-coated and combined.
5. Smooth Out: Use a spatula to smooth the filling into an even layer. This helps the casserole cook evenly and look beautiful once done!
6. Cook Low and Slow: Cover your slow cooker and cook on the LOW setting for 7 to 8 hours until the eggs are cooked through and lightly browned around the edges. It s okay to sleep in a little!
7. Add Final Touches: Once cooked, turn off the slow cooker and sprinkle the remaining 1/2 cup of shredded cheese over the top of your casserole.
8. Melt the Cheese: Cover again and let it sit for about 5 minutes, allowing the cheese to melt completely for that perfect gooey topping.

Optional: Serve with fresh herbs or a dollop of salsa for added flavor!
Exact quantities are listed in the recipe card below.

Expert Tips for Overnight Crock-Pot Breakfast Casserole

• Use Fresh Eggs: Starting with fresh eggs ensures a fluffier texture and richer flavor in your casserole, enhancing the overall dish.
• Layer Evenly: When adding ingredients, layer them evenly in the slow cooker. This promotes even cooking and prevents any soggy spots in your casserole.
• Check Cheese Choice: For the best melt, opt for high-quality cheese. Freshly grated cheese will melt better than pre-shredded varieties, making your casserole even more delicious.
• Mind the Salt: Be cautious with added salt in your Overnight Crock-Pot Breakfast Casserole. The ham and cheese can add significant saltiness; taste and adjust accordingly.
• Customize Veggies: Don t hesitate to swap in your favorite vegetables! Zucchini or mushrooms can also work well; just make sure they re chopped into small pieces for proper cooking.
• Prep the Night Before: To make mornings even easier, prepare all your ingredients the night before, so they re ready to go in the slow cooker when you wake up!

How to Store and Freeze Overnight Crock-Pot Breakfast Casserole

• Room Temperature: It s best to avoid leaving your casserole at room temperature for more than 2 hours to prevent bacterial growth.
• Fridge: Store any leftovers in an airtight container in the refrigerator for up to 3 days. Reheat portions in the microwave for a quick breakfast option.
• Freezer: For longer storage, freeze portions in an airtight freezer-safe container for up to 2 months. Thaw in the fridge before reheating to maintain the best texture.
• Reheating: When ready to enjoy leftovers, reheat in the microwave, covered, for 1-2 minutes or in the oven at 350 °F (175 °C) until warmed through, ensuring the Overnight Crock-Pot Breakfast Casserole is piping hot all the way through.

What to Serve with Overnight Crock-Pot Breakfast Casserole?

There s something truly special about crafting the perfect meal pairing for a cozy breakfast experience that can brighten anyone s day.

• Fresh Fruit Salad: A vibrant mix of seasonal fruits adds a refreshing contrast to the rich casserole, bringing brightness and natural sweetness to the table. Serve it alongside your casserole for a delightful burst of flavor.
• Crispy Bacon: The salty, crispy bite of bacon complements the creamy texture of the casserole while adding a satisfying crunch. This classic pairing is sure to please every palate and elevate your breakfast feast.
• Sourdough Toast: Serve with toasted sourdough drizzled with a bit of olive oil or butter to add a crunchy texture, perfect for scooping up cheesy goodness from the casserole.
• Avocado Slices: Creamy avocado slices on the side offer a rich, buttery contrast to the heartiness of the casserole. Plus, they add a nutritious boost that keeps your breakfast balanced.
• Herbed Yogurt Dip: Mix Greek yogurt with herbs like dill and chives for a tangy, creamy dip that contrasts beautifully with the casserole s warm, savory flavor. It s a unique twist that makes breakfast unforgettable.
• Mimosas: Celebrate your morning with a refreshing mimosa! The light sparkle and fruity flavor balance the richness of the Overnight Crock-Pot Breakfast Casserole, making every sip a delight.
• Coffee: A steaming cup of freshly brewed coffee pairs perfectly, enhancing the warmth of the casserole while providing that much-needed morning boost.
• Sweet Pastry: Add a sweet touch with cinnamon rolls or danishes to end your breakfast on a delicious note, offering a delightful contrast to the savory casserole.
• Breakfast Potatoes: Rustic breakfast potatoes, crispy on the outside and fluffy on the inside, create a satisfying textural contrast that rounds out your morning spread beautifully.

Each of these pairings adds to the magic of your breakfast, ensuring that every bite is as memorable as the last!

Make Ahead Options

These Overnight Crock-Pot Breakfast Casserole ingredients can be prepped in advance, making mornings effortless for busy home cooks! You can assemble the casserole (without the eggs) up to 24 hours ahead; just refrigerate the layered veggies, ham, and cheese in an airtight container. When you re ready to cook, whisk together the egg mixture and pour it over the prepared ingredients in the slow cooker. This method keeps your casserole flavors intact, ensuring it s just as delicious when cooked. Simply set your slow cooker on the LOW setting for 7 to 8 hours the next morning, and enjoy a warm, hearty breakfast with minimal effort!

Overnight Crock-Pot Breakfast Casserole Variations

Feel free to get creative and make this dish your own with these delightful twists!

• Vegetarian: Swap out the ham for sautéed mushrooms and add more veggies like zucchini or cherry tomatoes for a colorful, meatless dish.
• Spicy Twist: Add diced jalapeños or a sprinkle of crushed red pepper flakes for an extra kick to your morning routine.
• Gluten-Free: Double-check your ingredients; choose gluten-free bread chunks or omit any bread components for a totally gluten-free version.
• Cheesy Delight: Experiment with different types of cheese such as gouda or feta for a unique and flavorful topping that changes the casserole s personality.
• Savory Herb Infusion: Mix in fresh herbs like chopped parsley or chives to brighten the flavor profile and add a fragrant touch to each bite.
• Herbed Creaminess: Replace sour cream with herbed cream cheese for a rich and flavorful base; it adds a luscious texture that s truly comforting.
• Sweet Addition: For a sweeter breakfast, throw in some cinnamon and chopped apples for a delicious fall-inspired variation that s perfect for brunch!

With these variations, you can wake up to something new and exciting every time!

Overnight Crock-Pot Breakfast Casserole Recipe FAQs

How do I choose the right ingredients for my casserole?
Absolutely! When selecting your ingredients, opt for fresh eggs, vibrant bell peppers, and baby spinach for maximum flavor and nutrition. Make sure your frozen potatoes are free of visible frost and ice, indicating they re fresh. If possible, check the deli ham for quality, ensuring it s thick-cut to add a hearty bite to your casserole.

What is the best way to store leftovers?
Very! Store any leftover Overnight Crock-Pot Breakfast Casserole in an airtight container in the refrigerator for up to 3 days. If you d like to keep it longer, it s best to freeze individual portions in freezer-safe containers for up to 2 months. Just remember to label the containers with the date to keep track!

Can I freeze this casserole, and how do I do it?
The more the merrier! To freeze your casserole, first, allow it to cool completely once cooked. Then, cut it into portion sizes and wrap each piece in plastic wrap before placing them into an airtight freezer-safe container. This ensures that each piece is well-protected from freezer burn. When you re ready to enjoy it, just thaw in the fridge overnight, then reheat in the microwave or oven.

What should I do if my casserole is too watery?
If your casserole turns out watery, it could be due to excess moisture from the veggies or not using the right type of potatoes. Next time, try squeezing excess moisture from vegetables like spinach or use frozen shredded potatoes specifically recommended for casseroles. If your current casserole is already cooked, you can let it sit uncovered in the oven at 350 °F (175 °C) for about 10-15 minutes to help evaporate some moisture, allowing it to set better.

Is there a way to make this casserole gluten-free or suitable for allergies?
Absolutely! To make your Overnight Crock-Pot Breakfast Casserole gluten-free, ensure that all your ingredients, including the ham and any seasonings, are labeled gluten-free. You can also substitute the Dijon mustard with a gluten-free version, or just omit it altogether. If you re concerned about dairy allergies, substitute the sour cream with a dairy-free option, like cashew cream or plain almond yogurt, and use a plant-based cheese for that gooey topping!