Leftover Cornbread Breakfast Casserole Recipe

If you’re staring at that slab of leftover cornbread and wondering what to do, let me introduce you to Leftover Cornbread Breakfast Casserole—your new favorite cozy morning cure! This recipe transforms yesterday’s cornbread (and a handful of staple kitchen ingredients) into a savory, cheesy, soul-warming breakfast that brings everyone running to the table. It’s hearty, flexible, and the ultimate feel-good start to any day.

Ingredients You’ll Need

The beauty of this casserole is in how each simple ingredient brings a distinct note to the harmony—richness from the eggs, a savory punch from sausage, a bit of crunch from peppers, and that unmistakable tender bite of cornbread. Together, they create a breakfast you’ll want to savor slowly with your morning coffee.

• Butter (divided): Adds luscious flavor and keeps your casserole from sticking—don’t be shy here!
• Chopped Onion: A classic flavor booster that caramelizes slightly, adding sweetness and depth.
• Uncooked Bulk Sausage: The meaty, savory star—use your favorite style, from spicy to mild.
• Chopped Bell Pepper (optional): For added color, subtle crunch, and a pop of freshness if you’re in the mood.
• Milk: Gives custardy creaminess to the casserole base.
• Large Eggs: The essential binder that gives the casserole its tender, fluffy structure.
• Salt, Black Pepper & Garlic Powder: Basic seasoning that lets all the other flavors shine.
• Leftover Cornbread (cubed or crumbled): Yesterday’s magic! It soaks up the custard and transforms into bites of golden goodness.
• Green Onions: A bit of mild, fresh sharpness that lifts every bite.
• Grated Cheddar Cheese (or your favorite): Melts to gooey perfection and adds richness—choose any cheese that melts well.

Variations

One of my favorite parts about the Leftover Cornbread Breakfast Casserole is how it invites creativity—think of it as a canvas for whatever’s on hand or for flavors you’re craving. Don’t hesitate to mix things up, swap proteins, or boost the veggie content to suit your mood or dietary needs!

• Vegetarian Version: Skip the sausage and add sautéed mushrooms or baby spinach for a garden-fresh casserole bursting with umami.
• Spicy Southwest: Use chorizo instead of breakfast sausage, swap in pepper jack cheese, and toss in a handful of diced jalapeños for bold flavor.
• Dairy-Free Delight: Opt for your favorite plant-based milk and cheese alternatives—this recipe holds up beautifully with substitutions.
• Cheese Lover’s Dream: Try sharp white cheddar, smoked gouda, or creamy Monterey jack to change up the melt and flavor profile.

How to Make Leftover Cornbread Breakfast Casserole

Step 1: Prepare Your Baking Dish & Preheat

Start by preheating your oven to 375°F (190°C) to get a head start on the magic. Generously butter a 9×13 inch baking dish (use about a tablespoon of your butter). This not only prevents sticking but also adds a golden, flavorful edge to your casserole!

Step 2: Sauté Sausage, Onion, and Peppers

Set a skillet over medium-high heat and melt your remaining butter. Add the chopped onion and sauté briefly until translucent and fragrant (about a minute). Toss in the sausage, breaking it up as it cooks and browns—this is when your kitchen starts to smell delicious! If using bell peppers, add them and cook until just softened to your liking. Remove from heat and set aside.

Step 3: Whisk the Custard

In a large bowl, whisk together the milk, eggs, salt, pepper, and garlic powder until the mixture is smooth and well combined. This is the luscious custard that will soak through the cornbread, creating the soft, rich body of your casserole.

Step 4: Layer It All Together

Begin with a layer of half your cornbread cubes or crumbles in the prepped baking dish. Next, sprinkle on half of the sausage mixture, half of the chopped green onions, and half of the cheese. Repeat with the remaining cornbread, sausage, green onions, and cheese to ensure every slice is loaded with flavor.

Step 5: Pour and Press

Slowly pour the milk and egg custard evenly over your casserole. If some of the cornbread floats, just use a spatula or the back of a spoon to gently press it down so it soaks up the custard—it all blends together in the oven for utter deliciousness.

Step 6: Bake to Golden Perfection

Pop your dish into the oven and bake for 30–35 minutes, or until the top is beautifully golden and the egg is set in the center. Let it rest for a couple of minutes before slicing—then dig in while it’s still warm and melty!

How to Serve Leftover Cornbread Breakfast Casserole

Garnishes

A sprinkle of extra green onions or chopped fresh herbs (like parsley or chives) right before serving really livens up the casserole and adds a pop of freshness and color. For a zesty touch, a dash of hot sauce or a spoonful of salsa is divine!

Side Dishes

This hearty casserole is endlessly welcoming to a side of fresh fruit salad, crisp breakfast greens, or even some creamy avocado slices. If you’re hosting a brunch, round things out with a pitcher of cold orange juice or a big pot of coffee—pure breakfast bliss!

Creative Ways to Present

For a brunch buffet, cut the casserole into small squares and serve on a platter with decorative toothpicks—so fun for guests! Or, scoop generous portions into individual ramekins for an elevated, restaurant-style experience at home. A colorful Dutch oven or ceramic baking dish also adds a rustic, homey touch when serving family-style.

Make Ahead and Storage

Storing Leftovers

If you’re lucky enough to have leftovers, simply cover your casserole tightly or transfer to an airtight container. It’ll keep in the fridge for up to 3 days, making it easy to enjoy a quick, delicious breakfast throughout the week.

Freezing

To freeze, let the casserole cool completely, then portion into slices and wrap each tightly in plastic wrap, followed by foil. Store in a freezer bag; it will stay tasty for up to 2 months. Just defrost overnight in the fridge before reheating for best results.

Reheating

For best texture, reheat slices in a 350°F (175°C) oven until warmed through (about 10–15 minutes). If you’re in a hurry, the microwave will do the trick—cover to keep it moist! Adding a fresh sprinkle of cheese or green onions just before serving brings back that fresh-baked flavor.

FAQs

Final Thoughts

This Leftover Cornbread Breakfast Casserole is one of those recipes that feels like a warm hug on a sleepy morning, and it’s every bit as flexible as it is delicious. Give it a try—you just might find it becomes your new favorite weekend tradition. Happy breakfasting!

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