Chicken Spaghetti with Rotel — Southern Casserole Recipe

What Makes It “Southern” (and Where Does Rotel Fit)?

Rotel Chicken Spaghetti is Texas-born church-supper food, popularised by Ree Drummond’s The Pioneer Woman in the 2000s and cemented as a Southern potluck staple ever since. The distinguishing move: a can of Rotel — diced tomatoes with green chiles — stirred into a Velveeta-based cream sauce. It adds acidity, mild heat, and colour flecks to what would otherwise be a very beige bake. As Julie at Southern Discourse notes, the Rotel is what separates this from a standard chicken tetrazzini — you taste it in every bite.

The other Southern signature? Velveeta. No, it isn’t artisanal, and yes, it melts like nothing else. Real cheddar plus a block of Velveeta gives you the smooth, gluey, spoon-coating sauce this casserole demands.

Ingredients (Serves 8)

The 45-Minute Method, Step by Step

1. Preheat + prep pan. Heat oven to 175 °C / 350 °F. Butter a 9×13-inch (23×33 cm) baking dish generously. Bring a large pot of salted water to the boil.
2. Cook the spaghetti (8 min). Snap the pasta in half, drop into boiling water, cook 1 minute short of the package’s al dente time. It finishes cooking in the oven — overboiling now equals mush later. Drain, don’t rinse.
3. Build the sauce (3 min). While the pasta boils, put the drained pot back on low heat. Add cream of chicken soup, undrained Rotel, milk, Velveeta, cream cheese, and 1½ cups cheddar. Stir until every cube of Velveeta melts smooth. Season with garlic, onion, paprika, salt, and pepper.
4. Combine. Turn off the heat. Add the shredded chicken and the drained spaghetti back to the pot. Toss with tongs until every strand is coated in orange, glossy sauce. It should look almost too saucy — it tightens up in the oven.
5. Load the dish. Transfer the mixture to the buttered baking dish, smoothing the top. Scatter the remaining 1 cup cheddar evenly across the surface — this becomes the crust.
6. Bake 30 minutes. Place uncovered on the middle rack. Done when the cheese on top is deep golden, the sauce bubbles hard around the edges, and a knife slides through clean. Rest 5 minutes before scooping. As Stacey at Southern Bite advises, that rest is what lets the sauce grip the pasta instead of pooling in the dish.
7. Garnish. Shower with chopped parsley for colour and a light green cut against all that cheese.

Times, Temps & Doneness Cues

Watch: Cheesy Chicken Spaghetti Casserole in Action

If you want to see the sauce build and the golden top before you commit to your own batch, this walkthrough shows exactly how a rotisserie-chicken version comes together:

Common Questions, Answered

Can I use something other than Rotel?

Yes. A 10 oz can of diced tomatoes plus 1 finely chopped jalapeño (or a 4 oz can of green chiles) is a solid swap. You lose that specific Rotel brine-and-chile flavour but keep the tomato-heat balance. Skipping the chiles entirely turns this into a classic chicken tetrazzini instead — still delicious, just tamer.

Do I really need Velveeta?

For that signature smooth texture, yes. Velveeta is emulsified — real cheese by itself breaks and goes grainy when it bakes long. If you refuse the block, substitute 8 oz of white American cheese from the deli counter (ask for it sliced thick). It melts almost as smoothly and skips the ultra-processed flavour some people don’t want.

How do I keep the pasta from going mushy?

Two rules: undercook the pasta by 1 full minute during the boil, and don’t rinse it (the surface starch helps the sauce cling). The pasta absorbs sauce as it bakes, so starting firm gives you al dente at the end. Overboiling is the single most common failure mode.

What sides work with it?

A crisp green salad with a sharp vinaigrette cuts through the richness. Garlic bread is traditional but honestly redundant — the casserole already carries the whole plate. My favourite pairing: simple roasted broccoli with lemon, or a bowl of pickled cucumbers to reset the palate between bites.

Rotel Chicken Spaghetti is the casserole your church potluck absolutely will not be complete without. Once you know the ratio — pound of pasta, four cups of chicken, one Rotel, one soup, block of Velveeta — you can build it in your sleep and swap in whatever’s in the fridge. Try it with leftover Thanksgiving turkey. You’ll thank me. — Emma