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Cozy Christmas Ham Casserole

Maya

By Maya

Mar 9, 2026

15 min prep
30 min cook
4 servings
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Cozy Christmas Ham Casserole

As the holiday season approaches, there's nothing quite like the warmth of a cozy casserole to bring everyone together. This Cozy Christmas Ham Casserole is the perfect blend of comfort and flavor, made with leftover ham, tender pasta or potatoes, and a rich, creamy cheese sauce that will have your loved ones coming back for seconds (and thirds!).

Imagine a bubbling dish emerging from the oven, golden and inviting, filled with savory bites of ham and a velvety sauce that clings to every noodle or potato. It’s the ultimate dish to warm your hearts and bellies during those chilly winter nights.

Why You'll Love This Recipe

  • Comforting and Hearty: This casserole is like a warm hug on a plate, perfect for chilly evenings.
  • Easy to Make: With simple ingredients and straightforward steps, it's a breeze to whip up.
  • Great for Leftovers: Transform your holiday ham into a delicious new dish that everyone will love.
  • Customizable: Feel free to add your favorite vegetables for added flavor and nutrition.

About the Ingredients

Diced Leftover Ham

This is the star of the dish, providing a savory, smoky flavor that enhances the entire casserole.

Cooked Pasta or Potatoes

These create a hearty base that soaks up all the delicious flavors of the cheese sauce.

Medium Onion

Finely chopped, onions add a subtle sweetness and depth to the dish, balancing out the richness.

Garlic

Minced garlic infuses the casserole with its aromatic goodness, making every bite irresistible.

Butter

This is essential for creating a rich roux, which forms the foundation of your creamy sauce.

Shredded Cheese

Choose cheddar or a blend for that gooey, melty texture that pulls apart beautifully.

Fresh Herbs

Thyme or parsley not only garnish the dish but also add a fresh burst of flavor to each serving.

Tips & Tricks

Prep Ahead

Assemble the casserole a day in advance and refrigerate it until you're ready to bake.

Use a Variety of Cheeses

Mix different cheeses like mozzarella, gouda, or pepper jack for a unique flavor profile.

Experiment with Veggies

Add in bell peppers, peas, or mushrooms for an extra layer of taste and nutrition.

Don't Rush the Roux

Cook the roux until it's lightly golden to enhance the flavor of the sauce.

Pro Tips

  • Use Whole Milk or Cream: For the richest, creamiest sauce, opt for whole milk or heavy cream.
  • Mix Gently: When combining the sauce with the ham mixture, stir carefully to avoid breaking the pasta or potatoes.
  • Let It Rest: Allow the casserole to cool for a few minutes before serving; it will set up nicely.
  • Top with Extra Cheese: Sprinkle additional cheese on top before baking for an even more decadent finish.

Step-by-Step Instructions

Preheat the Oven

Set your oven to 350°F (175°C) and lightly grease a 9x13-inch baking dish to prevent sticking.

Assemble the Base

In a large bowl, combine the diced ham, cooked pasta or potatoes, chopped onion, and minced garlic, mixing them well.

Make the Roux

Melt butter in a saucepan over medium heat until foamy, then whisk in the flour. Cook for 1-2 minutes until it’s lightly golden.

Create the Sauce

Slowly pour in the milk or cream while whisking constantly until the sauce becomes smooth and thick.

Add Cheese & Mustard

Stir in the shredded cheese and Dijon mustard until fully melted and creamy, then season with salt and pepper.

Delicious Variations

Vegetable Medley

Add bell peppers, peas, or mushrooms to the casserole for a colorful and nutritious boost.

Spicy Twist

Incorporate diced jalapeños or a splash of hot sauce to give the dish a little kick.

Herbed Delight

Mix in fresh herbs like rosemary or basil for an aromatic twist that elevates the flavor.

How to Store Cozy Christmas Ham Casserole

Refrigerator

Store leftovers in an airtight container for up to 3-4 days in the refrigerator.

Freezer

Freeze the casserole for up to 2 months. Thaw overnight in the refrigerator before reheating.

Reheating

Reheat in the oven at 350°F (175°C) until warmed through, about 20-25 minutes.

Frequently Asked Questions

Can I use fresh ham instead of leftover?

Yes, you can use freshly cooked ham; just ensure it’s diced into small pieces.

Is it possible to make this casserole vegetarian?

Absolutely! Substitute the ham with a variety of vegetables or plant-based proteins.

Can I prepare it the night before?

Yes, you can assemble it ahead of time and just bake it when you're ready to serve.

What sides pair well with this casserole?

Serve it with a fresh green salad or some crusty bread for a complete meal.

Now that you have this delightful recipe for Cozy Christmas Ham Casserole, gather your loved ones around the table and enjoy the warmth and joy it brings. Happy cooking!

Cozy Christmas Ham Casserole

Cozy Christmas Ham Casserole

A warm, creamy Christmas ham casserole made with leftover ham, tender pasta or potatoes, and rich cheese sauce for a comforting holiday dinner.

15 min
Prep Time
30 min
Cook Time
4
Servings
450 kcal
Calories

Ingredients

Instructions

  1. 1 Preheat Oven: Set your oven to 350°F (175°C) and lightly grease a 9x13-inch baking dish.
  2. 2 Assemble the Base: In a large bowl, combine the diced ham, cooked pasta or potatoes, chopped onion, and minced garlic.
  3. 3 Make the Roux: Melt butter in a saucepan over medium heat until foamy, then whisk in flour. Cook for 1-2 minutes until lightly golden.
  4. 4 Create the Sauce: Slowly pour in the milk or cream, whisking constantly until the sauce becomes smooth and thick.
  5. 5 Add Cheese & Mustard: Stir in shredded cheese and Dijon mustard until fully melted and creamy.
  6. 6 Season & Combine: Season with salt and pepper, then pour the sauce over the ham mixture. Mix gently to coat.
  7. 7 Bake: Transfer the mixture to the prepared baking dish and bake for 20-25 minutes, until bubbly and golden on top.
  8. 8 Rest & Garnish: Let cool for 5 minutes, then finish with fresh thyme or parsley.

Chef's Note

Use sharp cheddar for the richest flavor. Let the casserole rest before serving to help it set. Perfect for winter nights and holiday gatherings.

Servings: 4

Cuisine: American

Course: Main Course

Nutrition (per serving): 25gg protein