Kittencal's Tuna Spaghetti Casserole

Creamy, cheesy, and packed with comforting flavors, Kittencal's Tuna Spaghetti Casserole is a delectable twist on classic tuna casseroles, perfect for busy weeknights or casual family dinners. This easy-to-make dish combines tender spaghetti with a rich sauce made from savory cream of mushroom soup, milk, and melted cheddar cheese, all infused with the flavors of sautéed onions, celery, garlic, and flaky canned tuna. Topped with a golden layer of cheddar, parmesan, and optional breadcrumbs, this hearty casserole bakes to bubbly perfection in just 30 minutes. Ideal for feeding a crowd, it’s a budget-friendly recipe that’s as satisfying as it is simple. Finish with a sprinkle of fresh parsley for a pop of color and serve this crowd-pleaser straight from the oven for a meal everyone will love.

Nutriscore Rating: 61/100

Prep Time:20 mins

Cook Time:30 mins

Total Time:50 mins

Servings: 6

Ingredients

• 12 oz spaghetti
• 2 cans canned tuna in water, drained
• 2 cans cream of mushroom soup
• 1 cup milk
• 3 tbsp butter
• 1 medium onion, finely chopped
• 2 stalks celery, finely chopped
• 2 cloves garlic, minced
• 2 cups sharp cheddar cheese, shredded
• 1 cup parmesan cheese, grated
• 1 cup breadcrumbs (optional, for topping)
• 1 tbsp vegetable oil
• 2 tbsp fresh parsley, chopped (optional)
• 1 tsp salt
• 0.5 tsp black pepper

Directions

Step 1

Preheat the oven to 375°F (190°C). Lightly grease a 9x13-inch casserole dish and set aside.

Step 2

Cook the spaghetti according to the package instructions until al dente. Drain and set aside.

Step 3

In a large skillet, heat the vegetable oil over medium heat. Add the onion, celery, and garlic. Sauté until softened, about 5 minutes.

Step 4

Stir in the butter and allow it to melt. Once melted, add the cream of mushroom soup and milk, stirring until the mixture is creamy and smooth.

Step 5

Add the drained tuna, salt, and black pepper. Mix well to incorporate.

Step 6

In a large mixing bowl, combine the cooked spaghetti, the creamy tuna mixture, and 1 cup of the shredded cheddar cheese. Toss until evenly mixed.

Step 7

Pour the mixture into the prepared casserole dish, spreading it evenly.

Step 8

Sprinkle the remaining 1 cup of cheddar cheese and the parmesan cheese over the top. If using breadcrumbs, sprinkle them evenly as well.

Step 9

Bake in the preheated oven for 25-30 minutes, or until the top is golden and bubbling.

Step 10

Remove from the oven and let the casserole cool slightly for 5 minutes. Garnish with chopped fresh parsley, if desired, before serving.

Nutrition Facts

Serving size	(1901.0g)

Amount per serving	% Daily Value*
Calories	3126.2

Total Fat 180.0g	0%
Saturated Fat 96.7g	0%
Polyunsaturated Fat 18.7g
Cholesterol 485.1mg	0%
Sodium 8533.0mg	0%
Total Carbohydrate 235.8g	0%
Dietary Fiber 14.6g	0%
Total Sugars 43.7g
Protein 156.5g	0%

Vitamin D 378.2IU	0%
Calcium 3395.0mg	0%
Iron 12.3mg	0%
Potassium 2164.5mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 50.8%

Protein: 19.6%

Carbs: 29.6%