The Ultimate Thanksgiving Leftover Breakfast Casserole: Sweet & Savory Hawaiian Roll Bake

Transform your Thanksgiving leftovers into a delightful breakfast casserole, brimming with the sweetness of Hawaiian rolls, savory turkey, fresh veggies, and aromatic herbs. It’s the perfect post-holiday morning treat!

Thanksgiving is a feast, a celebration of abundance, family, and gratitude. But once the last slice of pie is served and the dishes are done, a new challenge emerges: what to do with all those delicious leftovers? While turkey sandwiches are a classic, why not elevate your post-holiday dining experience with something truly spectacular and comforting? This Thanksgiving Leftover Breakfast Casserole is the answer you’ve been searching for. It’s an ingenious way to repurpose your holiday bounty into a mouth-watering breakfast or brunch that’s both incredibly easy to make and utterly satisfying.

Forget the same old reheated turkey – this recipe breathes new life into your holiday remnants, turning them into a cohesive, flavorful dish that feels entirely new. Imagine waking up the day after Thanksgiving, perhaps still in a food coma from the previous night’s festivities, and being greeted by the comforting aroma of a warm, savory-sweet casserole baking in the oven. It’s the ideal meal for a relaxed holiday weekend, whether you’re lounging around, watching football, or starting your Christmas decorating with a cozy, delicious start.

Why This Leftover Casserole Will Become Your New Holiday Tradition

This isn’t just another breakfast dish; it’s a culinary masterpiece that addresses several common post-Thanksgiving dilemmas. Firstly, it’s incredibly efficient. Instead of letting your hard-earned turkey, roasted vegetables, and aromatic herbs go to waste, this casserole integrates them beautifully. Secondly, it’s delightfully easy. Most of the heavy lifting – the cooking of the main ingredients – has already been done. All that’s left is to combine, bake, and enjoy. Thirdly, the flavor profile is simply irresistible. The combination of sweet Hawaiian rolls, savory turkey, tender vegetables, and a rich egg custard creates a harmonious blend that’s both familiar and exciting.

The Unexpected Hero: King’s Hawaiian Rolls

What sets this breakfast casserole apart is the ingenious use of King’s Hawaiian Rolls. These sweet, fluffy rolls are not just for dinner – their slightly sweet flavor and soft texture make them an extraordinary base for a breakfast casserole. When cubed and baked, they soak up the egg and milk mixture beautifully, creating a bread pudding-like consistency that is tender on the inside with a hint of crispiness on top. This sweetness perfectly complements the savory notes of the turkey and herbs, creating a balanced and utterly addictive dish. You’ll want to make sure you grab an extra bag when you’re doing your Thanksgiving grocery shopping, because those irresistible rolls rarely last through dinner!

Ingredients: Your Leftover Treasure Trove

The beauty of this casserole lies in its flexibility. It’s a fantastic way to use up those odds and ends from your Thanksgiving feast. Here’s a closer look at the key components:

King’s Hawaiian Rolls (cubed): About 12 rolls are perfect. Their signature sweetness and airy texture are crucial here. They absorb the custard beautifully, creating a delightful base.
Leftover Cooked Turkey (diced): Approximately 2 cups. Both white and dark meat work wonderfully. Dicing ensures even distribution and bite-sized pieces throughout the casserole.
Leftover Veggies: Around 2 cups. This is where you can truly customize! Roasted sweet potatoes add a lovely sweetness, while Brussels sprouts or green beans provide a touch of savory earthiness. Don’t shy away from other roasted vegetables like carrots or even a bit of corn if you have them.
Large Eggs and Milk: 6 large eggs and 2 cups of milk form the rich, custardy base that binds everything together. This mixture provides moisture and a classic breakfast casserole texture.
Kosher Salt and Black Pepper: Essential seasonings to enhance all the flavors. Adjust to your taste, keeping in mind the seasoning level of your already-cooked leftovers.
Leftover Thanksgiving Herbs: About 2 teaspoons of a combination like sage, thyme, parsley, and/or rosemary. These herbs are the aromatic heart of Thanksgiving and bring that festive flavor directly into your breakfast. If you don’t have fresh leftover herbs, a good quality dried poultry seasoning can work in a pinch.
Leftover Cranberry Relish or Gravy: A ½ cup of either adds a final touch of traditional Thanksgiving flavor. Cranberry relish offers a sweet and tart counterpoint, while gravy provides extra savory richness. Choose your favorite!

Crafting Your Thanksgiving Leftover Breakfast Casserole: A Step-by-Step Guide

The process of assembling this casserole is as straightforward as it gets, making it perfect for a leisurely morning after a big holiday. With most of your ingredients already cooked, it’s all about combining and baking.

Prepare Your Oven: Start by preheating your oven to 350° F (175° C). This ensures the casserole bakes evenly and cooks through to golden perfection.
Combine the Solids: In a large casserole dish, gently combine the cubed King’s Hawaiian rolls, diced leftover turkey, and your choice of leftover veggies. Ensure they are evenly distributed, so every bite is packed with flavor and texture.
Whisk the Wet Ingredients: In a separate, large mixing bowl, whisk the eggs until they are smooth and light. Then, add the milk, kosher salt, black pepper, and the fragrant Thanksgiving herbs. Continue whisking until all these ingredients are thoroughly combined, creating a homogeneous custard base.
Marry the Mixtures: Pour the egg and milk mixture evenly over the solids in the casserole dish. Gently toss everything together. The goal is to ensure the bread, turkey, and vegetables are well-coated with the egg mixture, allowing the rolls to soak up the liquid and become tender during baking.
Bake to Perfection: Place the casserole dish in the preheated oven and bake for 30 minutes. After the initial bake, carefully remove the dish, cover it loosely with aluminum foil, and return it to the oven to bake for another 30 minutes. Covering the casserole helps prevent the top from browning too quickly while ensuring the interior cooks thoroughly and sets into a perfect custard.
Serve and Enjoy: Once baked, let the casserole rest for a few minutes before serving. This allows it to firm up slightly. Serve generous portions with a dollop of leftover cranberry relish or a drizzle of warm gravy. The tangy sweetness of cranberry relish provides a vibrant contrast to the rich, savory casserole, while gravy adds an extra layer of comfort.

Customization and Variations to Make It Your Own

One of the best aspects of this Thanksgiving Leftover Breakfast Casserole is its incredible versatility. Feel free to experiment with additional ingredients or swap out components based on what you have on hand and what flavors you love. Here are some ideas to inspire your culinary creativity:

Cheesy Indulgence: For a gooey, savory twist, sprinkle 1-2 cups of shredded cheese (cheddar, Gruyere, Monterey Jack, or a blend) over the casserole during the last 15-20 minutes of baking, after removing the foil. The cheese will melt into a golden, bubbly topping.
Spice It Up: If you enjoy a bit of heat, add a pinch of red pepper flakes to the egg mixture. You could also finely dice a small jalapeño (remove seeds for less heat) and add it with the other solids.
Extra Protein Power: While turkey is the star, you can enhance the protein content or vary the flavor by adding other cooked meats. Crispy bacon bits, diced cooked ham, or crumbled breakfast sausage would all be excellent additions.
More Veggie Variety: Don’t limit yourself to the suggested vegetables. Sautéed onions, bell peppers, mushrooms, or even a handful of fresh spinach (which will wilt down beautifully) can be folded into the mix. Just make sure any raw vegetables are finely diced or lightly pre-cooked to ensure they soften sufficiently during baking.
Sweetness Amplified: If you prefer a slightly sweeter breakfast, consider a light drizzle of maple syrup over individual servings of the casserole, especially if you’re topping it with cranberry relish.
Herb Variations: Experiment with different herb blends. Fresh rosemary and thyme are classic Thanksgiving flavors, but chives or a touch of dried oregano could also add an interesting dimension.
Dairy Alternatives: For those with dietary restrictions, unsweetened almond milk or oat milk can be used in place of regular milk. The texture might vary slightly, but the overall flavor will remain delicious.

Don’t be afraid to make this recipe truly yours. The core combination of sweet rolls, savory turkey, and creamy eggs is a fantastic canvas for your imagination.

Serving Suggestions and Perfect Pairings

While this casserole is hearty and satisfying on its own, it pairs wonderfully with a few simple accompaniments to complete your post-Thanksgiving breakfast or brunch. A warm cup of coffee or tea is a must for a relaxing morning. A glass of freshly squeezed orange juice or a fruit smoothie provides a refreshing contrast. For a lighter touch, a side of fresh fruit – perhaps some grapes, berries, or sliced oranges – would be delightful. And as mentioned, a dollop of that delicious Cranberry Jalapeno Relish or savory gravy truly ties the flavors back to the holiday feast.

Make-Ahead and Storage Tips

This casserole is fantastic for meal prepping, especially during a busy holiday weekend. You can assemble it the night before Thanksgiving or the night after the big meal, cover it tightly with plastic wrap, and refrigerate it. In the morning, simply pop it into the preheated oven (you might need to add an extra 10-15 minutes to the baking time if baking straight from the fridge). This allows you to wake up to the delicious aroma and a ready-to-bake breakfast with minimal effort.

Leftovers of the casserole itself (if there are any!) can be stored in an airtight container in the refrigerator for up to 3-4 days. To reheat, you can microwave individual portions or warm them in the oven at 300°F (150°C) until heated through. This casserole also freezes well. Wrap individual slices tightly in plastic wrap and then foil, or store them in a freezer-safe container for up to 1-2 months. Thaw overnight in the refrigerator and reheat as desired.

Conclusion: Embrace the Leftover Magic!

The Thanksgiving Leftover Breakfast Casserole is more than just a recipe; it’s a celebration of resourcefulness and deliciousness. It transforms the remnants of a grand feast into a comforting and exciting new meal that’s perfect for a relaxed post-holiday morning. With its effortless preparation, versatile ingredients, and irresistible sweet and savory balance, this casserole is sure to become a beloved tradition in your home. So, gather your Hawaiian rolls and those precious Thanksgiving leftovers, and get ready to create a breakfast that will warm your heart and satisfy your palate. Happy cooking, and happy feasting!

Thanksgiving Leftover Breakfast Casserole

Thanksgiving leftovers are turned into a delicious breakfast casserole filled with Hawaiian rolls, turkey, veggies and herbs!

Servings: 8 people

Prep Time: 15 minutes

Cook Time: 1 hour

Total Time: 1 hour 15 minutes

Author: Whitney Bond

Course: Breakfast, Brunch

Cuisine: American

Ingredients

12 King’s Hawaiian Rolls, cubed
2 cups leftover cooked turkey, diced
2 cups leftover veggies (sweet potatoes, brussels sprouts or green beans)
6 large eggs
2 cups milk
1 tsp kosher salt
¼ tsp black pepper
2 tsp leftover Thanksgiving herbs (combination of sage, thyme, parsley and/or rosemary)
½ cup leftover cranberry relish or gravy

Instructions

Preheat the oven to 350°F.
Mix the cubed rolls, turkey and veggies together in a large casserole dish.
In a large mixing bowl, whisk the eggs, then add the milk, salt, pepper and herbs, and continue whisking until well combined.
Pour the egg/milk mixture into the casserole dish. Toss lightly to combine.
Bake for 30 minutes. Cover with foil and bake for another 30 minutes.
Serve with leftover cranberry relish or gravy.

Nutrition Facts

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