Delicious Tuna Casserole Freezer Meal

Weeknight dinners can feel like a never-ending puzzle. You’ve got work, the kids have activities, and by the time everyone gets home, nobody wants to wait an hour for dinner to be ready. That’s when I turn to my freezer for help.

Tuna casserole is one of those meals that actually gets better when you make it ahead and freeze it. I prep a couple on the weekend when I’m already in the kitchen, and then I’ve got dinner sorted for those crazy busy nights. Just pop it in the oven, and you’re done. No last-minute scrambling or drive-thru runs.

Think you don’t like tuna casserole? I get it. But this one is comforting, filling, and honestly pretty tasty. Plus, you can make it now and thank yourself later when dinner is already handled.

What Kind of Tuna Should I Use?

For tuna casserole, you can use either chunk light or solid white albacore tuna, and both work great. Chunk light tends to be more budget-friendly and has a milder flavor, while albacore is a bit meatier with a firmer texture. Whether you go for tuna packed in water or oil is really up to you – water-packed is lighter and lets the other flavors shine through, while oil-packed adds a bit more richness to the dish. Just make sure to drain it well before adding it to your casserole, and if you’re using oil-packed, you might want to cut back slightly on the butter to keep things balanced.

Options for Substitutions

This classic casserole is pretty forgiving when it comes to swaps:

• Canned tuna: You can use canned salmon or even cooked chicken if you’re not a tuna fan. Just shred it up the same way you would the tuna.
• Elbow noodles: Any short pasta works great here – try rotini, shells, or penne. They all hold onto the sauce nicely and cook up about the same.
• Chicken broth: Vegetable broth works just as well, or you can use milk for a creamier sauce. If using milk, keep the heat lower when making the sauce to prevent scorching.
• Mayonnaise: Sour cream or Greek yogurt can replace the mayo if you prefer. They’ll give you that same creamy texture with a slightly tangier taste.
• Cheddar cheese: Feel free to swap in whatever cheese you have on hand – mozzarella, Monterey Jack, or a Mexican blend all work well. You can also mix different cheeses together.
• Butter: Olive oil or vegetable oil can replace the butter in the sauce, though butter does add nice flavor. Use the same amount if swapping.

Watch Out for These Mistakes While Cooking

The biggest mistake when making tuna casserole is overcooking the noodles during the initial boil – cook them 2-3 minutes less than the package directions since they’ll continue cooking in the oven and you don’t want mushy pasta.

Another common error is adding the mayonnaise while the sauce is still hot, which can cause it to separate and turn oily, so let your mixture cool for a few minutes before stirring it in.

If you’re planning to freeze this casserole, skip baking it first and freeze it unbaked instead – this prevents the noodles from getting too soft and the cheese from becoming grainy when you reheat it.

When you’re ready to bake from frozen, add an extra 15-20 minutes to the cooking time and cover with foil for the first half to prevent the top from burning before the center heats through.

What to Serve With Tuna Casserole?

Tuna casserole is a hearty dish on its own, but I love pairing it with a simple side salad to balance out all that creamy goodness. A basic green salad with lettuce, cucumber, and tomatoes dressed with a light vinaigrette works perfectly, or you could go with a classic Caesar salad if you want something a bit more filling. Steamed green beans or roasted broccoli are also great options that add some color to your plate without much effort. If you’re feeding a crowd, garlic bread or dinner rolls are always a hit for soaking up any extra sauce from the casserole.

Storage Instructions

Refrigerate: Leftover tuna casserole keeps great in the fridge for up to 4 days in an airtight container. It actually tastes even better the next day once all the flavors have had time to hang out together!

Freeze: This casserole is perfect for freezing! You can either freeze it before or after baking. Cover it tightly with plastic wrap and then foil, and it’ll stay good for up to 3 months. I like to label mine with the date and baking instructions so I don’t forget later.

Reheat: If frozen, thaw it overnight in the fridge before baking. For a pre-baked casserole, cover with foil and warm at 350°F for about 20-25 minutes until heated through. You can also microwave individual portions for a quick lunch.

Preparation Time	15-25 minutes
Cooking Time	30-45 minutes
Total Time	45-70 minutes
Level of Difficulty	Medium

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 2800-3100
• Protein: 110-130 g
• Fat: 130-150 g
• Carbohydrates: 285-315 g

Ingredients

For the creamy sauce:

• 1/4 cup all-purpose flour (I use King Arthur all-purpose flour)
• 2 cups chicken broth
• 1/4 cup butter (unsalted, softened to room temperature)

For the casserole:

• 1 can tuna, drained and shredded (I prefer Bumble Bee solid white)
• 1 box elbow macaroni
• 1/4 tsp ground black pepper
• 1 cup cheddar cheese, shredded (sharp cheddar for more flavor)
• Dash onion salt
• 1/4 tsp salt
• 1/2 cup mayonnaise
• Dash celery salt

For the topping:

• 1 cup cheddar cheese, shredded (optional but recommended for golden, crispy top)

Step 1: Prepare Mise en Place and Start the Pasta

• 1 box elbow macaroni
• Salt

While you gather and measure all ingredients, bring a large pot of salted water to a boil.

This gets your longest-cooking element started early.

Measure out the butter, flour, chicken broth, and have your tuna, mayonnaise, and cheeses ready.

Once the water is boiling, add the elbow macaroni and cook for 7-8 minutes until just al dente—you want it slightly underdone since it will cook again in the oven.

Step 2: Build the Creamy Sauce Base

• 1/4 cup butter
• 1/4 cup all-purpose flour
• 2 cups chicken broth

While the pasta cooks, melt the softened butter in a medium saucepan over medium heat.

Once melted, sprinkle in the flour and whisk constantly for 3-4 minutes to create a roux—this eliminates the raw flour taste and helps thicken your sauce.

Gradually pour in the chicken broth while whisking vigorously to prevent lumps from forming.

Continue cooking and stirring until the sauce thickens enough to coat the back of a spoon, about 5-7 minutes.

Set the sauce aside to cool slightly while you finish the pasta.

Step 3: Drain Pasta and Build the Casserole Mixture

• cooked macaroni from Step 1
• white sauce from Step 2
• 1 can tuna, drained and shredded
• 1/2 cup mayonnaise
• 1 cup cheddar cheese, shredded
• 1/4 tsp salt
• 1/4 tsp ground black pepper
• Dash onion salt
• Dash celery salt

Drain the cooked macaroni in a colander and rinse briefly with cool water to stop the cooking process—this prevents mushy pasta in the final dish.

Pour the drained pasta into a large mixing bowl and add the white sauce from Step 2.

Then add the drained and shredded tuna, mayonnaise, 1 cup of shredded cheddar cheese, salt, pepper, onion salt, and celery salt.

I recommend using sharp cheddar for the filling to give it more depth of flavor.

Stir everything together until well combined and the sauce coats all the pasta evenly.

Step 4: Assemble and Top the Casserole

• casserole mixture from Step 3
• 1 cup cheddar cheese, shredded

Transfer the tuna and pasta mixture from Step 3 into a 9×13 inch baking pan, spreading it evenly.

Sprinkle the remaining 1 cup of shredded cheddar cheese generously over the top—this creates that golden, crispy top layer as it bakes.

I always recommend adding this top layer of cheese even though it’s optional, as it adds wonderful texture and flavor.

Step 5: Bake or Freeze

At this point, you have two options: to serve immediately, bake the casserole uncovered at 350°F for 30-45 minutes until the cheese on top is golden brown and the edges are bubbling.

To freeze for later, cover the baking pan tightly with plastic wrap and then aluminum foil, and freeze for up to 3 months.

When ready to bake from frozen, add an extra 15-20 minutes to the baking time, still at 350°F.