Chicken Tetrazzini Betty Crocker Recipe: Creamy Mushroom and Broccoli Bake

The Betty Crocker-style chicken tetrazzini delivers that creamy, comforting casserole experience we all crave after a long day. 💛 I first discovered this recipe while searching for a way to transform leftover chicken into something restaurant-worthy—what emerged was a rich, mushroom-infused bake that became an instant family favorite.

The secret lies in balancing the creamy sauce with tender chicken and perfectly cooked pasta, all baked until bubbly and golden.

This dish is built on simple yet essential techniques: browning the chicken for deep flavor, simmering it in a velvety sauce with mushrooms and onions, then combining everything with al dente pasta.

The result is a creamy, satisfying bake that’s hearty enough for a weeknight dinner but impressive enough for company. I’ve refined the method over years to ensure the sauce stays rich without being overly heavy, and the broccoli adds just the right texture contrast.

What makes this tetrazzini special is how it transforms ordinary ingredients into something extraordinary. The creamy mushroom sauce coats every bite, while the chicken stays tender and the pasta holds its shape. Topped with toasted breadcrumbs (optional but recommended), it becomes crispy in all the right places.

This is the kind of dish that feels like a warm hug on a plate—comforting, flavorful, and impossible to resist.

Ready in about 45 minutes, it’s perfect for feeding a crowd or meal prepping for the week. The best part? Every bite delivers that creamy, savory satisfaction that makes it worth the effort. Let’s get baking!

Ingredients for chicken tetrazzini betty crocker

A creamy mushroom and broccoli bake that transforms simple pantry staples into restaurant-quality comfort.

The chicken breast is the foundation—pounding it to even thickness ensures consistent cooking. Costco or Whole Foods often carry pre-pounded cuts, but if not, use a meat mallet or rolling pin (the good kind, not a wine bottle). For mushrooms, cremini or baby bella add depth, but white mushrooms work perfectly fine. The broccoli should be bright green florets—avoid the pre-cut frozen kind unless it's the Trader Joe's organic variety, which holds up beautifully. Fresh thyme is ideal, but dried works at one-third the amount if that's what you have on hand. The Parmesan? Grate it yourself—pre-shredded gets clumpy and lacks flavor.

No sherry? Substitute with white wine or extra chicken broth—just add a splash of lemon juice for brightness. The heavy cream is non-negotiable for that velvety texture, but if you're watching calories, half-and-half lightens it without sacrificing too much richness. For the flour, Diamond Crystal kosher salt is my go-to—it dissolves better than table salt. If you're using fresh herbs, chop them just before adding to the sauce to preserve their aroma. The panko breadcrumbs? Toast them in butter first—this adds a crispy contrast that makes the dish sing. And if you're short on time, pre-cooked rotisserie chicken works beautifully here (just shred it finely).

This dish reheats like a dream—cover with foil and bake at 350°F for 15-20 minutes to restore that creamy texture. It keeps well in the fridge for 4-5 days, though I find it tastes even better the next day as flavors meld. For meal prep, portion into individual baking dishes—just add a splash of broth when reheating to keep it moist. The sauce thickens as it cools, so loosen with a splash of milk or broth if it seems too stiff when serving. And if you're feeding a crowd, double the recipe—it scales perfectly.

Step-by-step instructions for creamy mushroom and broccoli chicken tetrazzini

Here's the method—rich, velvety, and packed with flavor every bite.

Bring a large pot of salted water to a rolling boil. Add the 12 oz fettuccine pasta and cook for 1 minute less than the package instructions specify for al dente. Reserve 1 cup of pasta water before draining—this starchy liquid is essential for binding the creamy sauce later.

Drain the pasta and set it aside. The slight undercooking ensures the noodles finish cooking in the oven while absorbing the rich sauce. Overcooked pasta becomes mushy when reheated, so resist the urge to cook it fully here.

In a large skillet, melt 4 tbsp unsalted butter over medium heat. Add the 1½ lb fresh white mushrooms (sliced) and 1 yellow onion (thinly sliced), cooking for 8-10 minutes until the mushrooms release their moisture and the onion softens. Stir occasionally to prevent sticking.

Add the 4 minced garlic cloves and 1 tsp dried thyme, cooking for 30 seconds until fragrant. This aromatic base forms the flavor backbone of the dish. If the mushrooms aren't golden, increase heat slightly and cook until they develop color.

In a separate bowl, whisk together 1 cup heavy cream, 1½ cups chicken broth, ½ cup dry sherry, and 2 tbsp all-purpose flour. Pour this mixture into the skillet with the mushrooms and stir over medium heat for 3-4 minutes until slightly thickened.

Season with 1 tsp salt and ½ tsp black pepper. The sauce should coat the back of a spoon but remain silky. If it thickens too quickly, add 2-3 tbsp reserved pasta water to maintain creaminess. This step ensures the sauce clings beautifully to the pasta and chicken.

In a large baking dish (about 9x13 inches), layer half of the cooked fettuccine, half of the 2½ lb boneless, skinless chicken breast (sliced into thin strips), and half of the 2 cups fresh broccoli florets. Repeat with the remaining ingredients, ending with the broccoli on top.

Pour the creamy sauce evenly over the top, then sprinkle with ½ cup parmesan cheese and ¼ cup toasted panko breadcrumbs. The breadcrumbs add a subtle crunch that contrasts the creamy sauce. Preheat your oven to 375°F while you assemble.

Transfer the baking dish to the preheated oven and bake for 25-30 minutes until the top is golden brown and bubbly. The edges should be crisp, and the sauce should look glossy and inviting.

Remove from the oven and let it rest for 5 minutes before serving. This resting period allows the sauce to thicken slightly and the flavors to meld. Serve immediately with a side salad or garlic bread to soak up every last drop of that creamy, mushroom-infused goodness.

Health benefits of this chicken tetrazzini betty crocker

Protein Powerhouse

This dish delivers 2.5 lbs of lean chicken breast per serving, providing about 50 grams of high-quality protein each. Protein supports muscle repair and keeps you full longer, making it ideal for meal prep or busy weeknights.

The chicken’s tenderness is preserved by gentle cooking methods that avoid toughening the fibers. 💪

Bone Health Boost

The ½ cup Parmesan cheese and 2 cups chicken broth in this recipe pack 30% of your daily calcium and 20% of vitamin D—critical nutrients for strong bones.

Calcium strengthens bones while vitamin D helps your body absorb it efficiently. This combo makes it a great dish for maintaining skeletal health.

Vitamin D from Mushrooms

Did you know 1.5 lbs of fresh white mushrooms contain 10% of your daily vitamin D? These fungi are one of the few plant-based sources of this sunshine vitamin, which supports immune function and mood regulation. The mushrooms also add a meaty texture that enhances the dish’s heartiness. ✨

Fiber from Broccoli

The 2 cups of fresh broccoli florets bring 6 grams of dietary fiber per serving, which aids digestion and helps maintain healthy blood sugar levels. Broccoli’s cruciferous compounds also provide antioxidants that support cellular protection. Pairing it with the creamy sauce balances the meal’s richness beautifully.

Healthy Fats in Moderation

While the 1 cup heavy cream adds richness, it’s balanced by the lean protein and vegetables. Opt for full-fat cream for authentic flavor, but if you prefer lighter options, substitute with half-and-half to reduce saturated fat slightly. The key is moderation—this dish delivers satisfying fats without overdoing it.

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