The morning after Thanksgiving, I opened my fridge and found containers of turkey, roasted veggies, and a few extra rolls. I wanted something warm and filling that didn’t need much effort. So I tossed everything together with eggs and milk, and this Thanksgiving leftover breakfast casserole was born.

It came out golden on top, soft in the middle, and full of holiday flavor. My family went back for seconds before I even sat down. If you need breakfast ideas with Thanksgiving leftovers, I promise this Thanksgiving Leftover Breakfast Casserole Recipe is worth trying.

Thanksgiving Leftover Breakfast Casserole Recipe

Cooking Time

Here is how long this casserole takes from start to finish. Most of the time is hands-off baking, so you can relax while the oven works.

Prep Time: 15 minutes
Cooking Time: 1 hour
Total Time: 1 hour 15 minutes

Ingredients

This ingredient list is short and flexible. Every item has a job, and I’ve added a quick tip to each one so your casserole turns out right.

12 Hawaiian rolls, cubed: Their sweetness balances the salty turkey, so don’t swap in plain bread if you can avoid it.
2 cups leftover cooked turkey, diced: Dice it small so every bite has a little protein.
2 cups leftover veggies (sweet potatoes, Brussels sprouts, or green beans): Pat them dry first so the casserole doesn’t turn watery.
6 large eggs: They bind everything together and set into a soft custard.
2 cups milk: Whole milk gives the creamiest, richest texture.
1 teaspoon kosher salt: Taste your leftovers first, since they’re already seasoned.
¼ teaspoon black pepper: Freshly ground pepper adds a warmer, sharper flavor.
2 teaspoons leftover Thanksgiving herbs (sage, thyme, parsley, or rosemary): Chop them finely so the flavor spreads evenly.
½ cup leftover cranberry relish or gravy: Warm it before serving for a cozy finishing touch.

Note: serves several

Equipment You Need

You don’t need anything fancy here. Most of these tools are probably already in your kitchen.

Large casserole dish: Holds the rolls, turkey, and egg mixture while it bakes.
Large mixing bowl: Gives you room to whisk the eggs and milk without splashing.
Whisk: Blends the eggs, milk, and seasonings into a smooth custard.
Cutting board and knife: Used for cubing the rolls and dicing the turkey and veggies.
Measuring cups and spoons: Keep the custard-to-bread ratio accurate.
Aluminum foil: Covers the dish halfway through so the top doesn’t burn.

How to Make Thanksgiving Leftover Breakfast Casserole Recipe?

This recipe is as easy as leftover recipes get. You mix the base, whisk the custard, and let the oven do the rest. Follow these steps and you’ll have a golden, fluffy casserole in about an hour and fifteen minutes.

Preheat the Oven and Prep Your Leftovers

Start by heating your oven to 350°F so it’s ready when the casserole is assembled. Pull your turkey and veggies out of the fridge and let them sit for a few minutes. Cold ingredients can slow the cooking, so this small step helps the casserole bake evenly.

Cube the Rolls

Cut your Hawaiian rolls into bite-sized cubes, about one inch each. Uniform pieces soak up the egg mixture evenly and bake at the same pace. If your rolls feel very soft, leave them out for a bit to dry slightly.

Build the Casserole Base

Add the cubed rolls, diced turkey, and leftover veggies to a large casserole dish. Mix them gently with your hands or a spoon until everything is spread out. A good mix means every slice will have bread, protein, and veggies.

Whisk the Egg Mixture

Crack the eggs into a large mixing bowl and whisk them well. Add the milk, salt, pepper, and chopped herbs, then keep whisking until it’s fully combined. You want a smooth mixture with no streaks of egg white left.

Pour and Toss

Slowly pour the egg and milk mixture over the rolls, turkey, and veggies in the dish. Toss everything lightly so the liquid reaches the bottom layer too. Don’t press it down hard, because the bread should stay fluffy.

Bake Uncovered

Slide the dish into your preheated oven and bake it for 30 minutes without a cover. This lets the top turn golden and slightly crisp while the center starts to set. Your kitchen will smell like a holiday morning by this point.

Cover and Finish Baking

Cover the dish with foil and bake for another 30 minutes. The foil traps steam, which keeps the casserole moist and stops the top from over-browning. When the center is firm and no liquid pools in the middle, it’s ready.

Rest and Serve

Take the dish out of the oven and let it rest for five to ten minutes. This helps the custard settle so your slices hold together nicely. Serve it warm with leftover cranberry relish or gravy on the side.

Additional Tips for Making This Recipe Better

I’ve made this casserole a few times now, and these small tricks make a real difference. Try them to get the best texture and flavor.

I always dry my leftover veggies on a paper towel before adding them. Extra moisture can make the casserole soggy.
I taste the turkey and veggies before adding salt. Leftovers are often seasoned already, and I once made it too salty.
I use stale or slightly dried-out rolls when I can. They soak up the custard without turning mushy.
I let the assembled dish sit for 10 minutes before baking. The bread drinks in more of the egg mixture.
I chop fresh herbs instead of using dried ones when I have them. The flavor is brighter and tastes more like Thanksgiving.
I rest the casserole before slicing it. My first batch fell apart because I cut it too soon.

Common Mistakes to Avoid

Even an easy recipe has a few traps. Here are the mistakes I’ve made or seen others make, and how to avoid them.

Skipping the foil: I once left the dish uncovered the whole time, and the top got too dark. Cover it halfway through.
Adding too many wet veggies: Soggy casseroles usually come from damp leftovers. I always blot them first.
Pressing the bread down: Packing the dish tightly makes it dense. I keep it loose and fluffy.
Under-whisking the eggs: Streaks of egg white bake into rubbery spots. I whisk until the mixture looks completely smooth.
Cutting too soon: Slicing right out of the oven makes it fall apart. I wait at least five minutes.

How to Serve Thanksgiving Leftover Breakfast Casserole?

This casserole looks lovely on the table with just a few small touches. Think warm, golden slices with colorful toppings that make the plate pop.

Spoon a little warm cranberry relish or gravy over each slice for a bright, festive finish.
Sprinkle chopped fresh parsley or sage on top for a pop of green.
Serve square slices on white plates so the golden color stands out.
Add a fresh fruit bowl, like orange slices or pomegranate seeds, on the side.
For a California-style brunch, I like adding sliced avocado and a squeeze of fresh citrus. It feels like a sunny morning on the coast.
Pair it with hot coffee, spiced tea, or fresh orange juice.

Variations

This recipe is very forgiving, so you can adjust it to fit your needs. Here are some ideas I’d try.

Dairy-free: Swap the milk for unsweetened almond or oat milk, and use dairy-free rolls.
Lower sugar: Use savory bread instead of Hawaiian rolls to cut the sweetness.
Stuffing breakfast casserole: Replace the rolls with leftover stuffing for a savory twist. This is an easy leftover stuffing casserole that works well with homemade stuffing.
Kraft Stove Top stuffing breakfast casserole: Prepare boxed stuffing mix and use it as your base instead of rolls.
Extra flavor: Add sautéed onions, crumbled sausage, or a handful of shredded cheese.
California-inspired: Stir in diced green chiles, a little Monterey Jack, and top with salsa and avocado.
Different protein: Use leftover ham or chicken in place of turkey.

Nutritional Information

Here is the approximate nutrition for one serving of this casserole. Values will change a little depending on the leftovers you use.

Calories: 282 kcal
Protein: 16 g
Carbohydrates: 32 g
Fat: 9 g

Make Ahead and Storage

This casserole is great for busy mornings. A little planning makes it even easier, and the storage rules are simple.

Make Ahead

You can assemble the casserole the night before and keep it covered in the fridge. This works like an overnight breakfast casserole with stuffing mix or rolls. In the morning, add a few extra minutes to the baking time.

Storage

Let the baked casserole cool completely, then store it in an airtight container. It stays fresh in the fridge for about three to four days. Keep slices separated with parchment paper so they don’t stick.

Reheating

Warm single slices in the microwave for 45 to 60 seconds. For a crispier top, reheat them in a 350°F oven for about 10 minutes. Cover with foil so the casserole doesn’t dry out.

Freezing

Wrap individual slices tightly in foil, then place them in a freezer bag. They keep well for up to two months. Thaw overnight in the fridge before reheating, which makes them handy for early-morning drives or road trips along the California coast.

Why You’ll Love This Recipe

This casserole is more than a way to use up leftovers. Here is why it’s become a favorite in my kitchen.

Easy to make: You only need one dish, one bowl, and about 15 minutes of prep. There’s no fancy technique involved, so even beginners can nail it.
Uses up leftovers: Turkey, veggies, herbs, and cranberry relish all find a new purpose. It cuts down on food waste and saves you from cooking a fresh breakfast.
Great for crowds: It serves several people, so it works for family brunches and holiday mornings. You can easily double it for a larger group.
Flexible and customizable: Swap in different veggies, proteins, or even stuffing to match what’s in your fridge. It’s one of the best leftover stuffing casserole recipes for that reason.
Make-ahead friendly: Assemble it the night before and bake it in the morning. That leaves you more time to enjoy a slow, cozy start, whether you’re at home or planning a getaway day.

FAQs

Can I use leftover stuffing instead of rolls?

Yes, you can. A leftover stuffing breakfast casserole works well with the same egg mixture. Just break the stuffing into chunks and layer it in the dish.

Can I make this casserole without turkey?

Absolutely. Leftover ham, chicken, or sausage all work well. You can also skip the meat and add extra veggies.

How do I know when the casserole is done?

The center should look set and the top should be golden. If a knife inserted in the middle comes out clean, it’s ready.

Can I freeze the leftover turkey breakfast casserole?

Yes, you can. Wrap slices tightly and freeze them for up to two months. Thaw in the fridge overnight before reheating.

What can I serve with this casserole?

Fresh fruit, roasted potatoes, or a simple green salad pair nicely. A California-style side of sliced avocado and citrus also works well. Add hot coffee or juice to complete the meal.