| Prep Time | 20 minutes |
| Cook Time | 30 minutes |
| Total Time | 50 minutes |
| Skill Level / Intensity | Beginner to Intermediate |
| Baking Temperature | $375^\circ\text{F}$ ($190^\circ\text{C}$) |
| Baking Intensity | Medium Heat (Bake) / High Heat (Broil finish) |
| Yield | 8 generous servings |
Ingredients You’ll Need
For the Pasta & Chicken Base
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Spaghetti Noodles: 12 oz (340g), broken in half before boiling.
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Cooked Shredded Chicken: 3 cups (about 1.5 lbs / 700g). Rotisserie chicken works wonderfully here for extra speed and flavor.
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Olive Oil or Unsalted Butter: 2 tablespoons.
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Yellow Onion: 1 medium, finely diced.
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Red or Green Bell Pepper: 1 medium, finely diced.
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Garlic: 3 cloves, minced.
For the Creamy Cheese Sauce
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Condensed Cream of Chicken Soup: 1 can (10.5 oz / 298g).
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Diced Tomatoes with Green Chilies (Ro-Tel style): 1 can (10 oz / 283g), undrained.
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Velveeta or Melting Cheese: 8 oz (225g), cubed into 1/2-inch pieces.
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Sharp Cheddar Cheese: 2 cups (200g), freshly shredded (divided).
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Heavy Cream or Whole Milk: 1/2 cup (120ml).
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Chicken Broth: 1/2 cup (120ml).
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Cream Cheese: 4 oz (115g), softened at room temperature.
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Italian Seasoning: 1 teaspoon.
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Garlic Powder: 1/2 teaspoon.
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Onion Powder: 1/2 teaspoon.
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Salt & Black Pepper: 1/2 teaspoon salt and 1/4 teaspoon freshly cracked black pepper.
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Fresh Parsley: 2 tablespoons, chopped (for garnish).
Step-by-Step Cooking Guide
Pro Tips for Web & Home Cooks
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Cook Pasta Al Dente: Pasta continues to cook in the oven while baking in sauce. Undercooking it slightly while boiling prevents mushy noodles.
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Grate Your Own Cheese: Pre-shredded packaged cheeses contain anti-caking agents that prevent smooth melting. Freshly shredded sharp cheddar yields a much creamier texture.
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Adjust the Spice Level: For a mild version, swap diced tomatoes with green chilies for plain diced canned tomatoes. For extra kick, add chopped jalapeños or a dash of cayenne pepper.
Storage, Reheating & Shelf Life
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Refrigeration: Store cooled leftover chicken spaghetti in an airtight container or cover the baking dish tightly with plastic wrap. Keeps well in the fridge for 3 to 4 days.
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Freezing: Assemble the entire dish in a freezer-safe foil pan, but do not bake. Wrap tightly in plastic wrap and aluminum foil. Freeze for up to 3 months. Thaw overnight in the refrigerator before baking as instructed.
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Reheating: Reheat individual portions in the microwave for 1.5 to 2 minutes, adding a splash of milk if needed to loosen the sauce. For larger portions, cover with foil and bake at $350^\circ\text{F}$ ($175^\circ\text{C}$) for 15–20 minutes until heated through.
Comprehensive Nutritional Information
Calculated per serving (based on 1 slice/portion out of 8 total servings).
| Nutrient | Amount Per Serving | % Daily Value* |
| Calories | 465 kcal | — |
| Total Fat | 22 g | 28% |
| Saturated Fat | 11 g | 55% |
| Trans Fat | 0.5 g | — |
| Cholesterol | 95 mg | 32% |
| Sodium | 780 mg | 34% |
| Total Carbohydrate | 38 g | 14% |
| Dietary Fiber | 2 g | 7% |
| Total Sugars | 4 g | — |
| Protein | 28 g | 56% |
| Vitamin D | 0.6 mcg | 3% |
| Calcium | 240 mg | 18% |
| Iron | 2.1 mg | 12% |
| Potassium | 380 mg | 8% |