Your whole family is in for a treat tonight! This creamy gluten free chicken tetrazzini recipe is so easy to make using leftover rotisserie chicken! If you have missed chicken spaghetti, this easy tetrazzini recipe is worth making! You can enjoy this recipe in about 45 minutes, even less if you meal prep it the night before baking.

A bowl of gluten free chicken tetrazzini.

Before going gluten-free, I made a friend’s chicken spaghetti recipe fairly often. It was pure comfort food in a bowl, and it was definitely not very healthy. It used canned condensed milk and a lot of other processed ingredients. This recipe is not only flexible in what ingredients you use, but it is also wildly popular for dinner in our family. My chicken tetrazzini with mushrooms recipe is creamy and full of big chunks of rotisserie chicken.

My recipe is not only a tastier version of a chicken tetrazzini bake but also full of delicious creamy flavor. It was a huge hit with my kids!! You can enjoy this recipe in about 35 minutes, even less if you meal prep it before baking.

If you love this recipe, you will want to check out all of my easy Gluten Free Dinner Recipes! We love comfort food like this tetrazzini. If you love comfort foods, you will also love my Gluten Free Chicken and Dumplings recipe.

Allergen Information:

This tetrazzini recipe is gluten-free, soy-free, egg-free, and nut-free.

Photos of the chicken tetrazzini ingredients.

Ingredient Notes:

  • Gluten Free Spaghetti – I prefer Tinkyada and Jovial brands for this recipe because they hold together with the sauce and baking.
  • Rotisserie Chicken – I love the flavor rotisserie chicken adds to this casserole, but you can use any leftover chicken.
  • Cheddar Cheese – Use your favorite. I love sharp cheddar, but you can use another cheese.
  • Heavy Cream and Milk
  • Butter – Use unsalted butter.
  • Mushrooms – You can use any mushroom or add veggies to customize this recipe.
  • Onions – I prefer yellow onions.
  • Garlic – Fresh or minced.

Are you ready to try this easy gluten-free chicken spaghetti recipe?

Tips For Sucess

1. Add 1 TBSP of olive oil to the water if you are cooking gluten free spaghetti. After 1-2 minutes of the pasta cooking, use a fork to separate the pasta so it doesn’t stick together.
2. Cook the spaghetti 1 minute less than the package directions.

Step-By-Step Directions:

The first step is to gather up your chicken tetrazzini ingredients and put them all on the counter. It helps keep me organized, and I do this for any cooking or baking.

Making tetrazzini photos of steps 1 and 2.

Step 1: Add the butter, onion, and garlic to a skillet and cook on medium heat for 5 minutes.

Step 2: Add the mushrooms and cook until softened.

Tetrazzini photos of steps 3 and 4.

Step 3: Add the tapioca starch to the cooking vegetables and mix well. Mixing in the thickener now will prevent big lumps in the tetrazzini sauce.

Step 4: Add the rest of the liquid ingredients and cheese.

Tetrazzini photos of steps 5 and 6.

Step 5: Tear up the chicken into bite-sized pieces. Add in the rotisserie chicken or any grilled chicken leftovers. Mix well.

Step 6: Cook your gluten free spaghetti pasta in a large pot. I add a teaspoon of oil to the pot to prevent the spaghetti from sticking. Important: Cook the pasta one minute less than the package directions indicate! This will help it hold up to the tetrazzini sauce better.

Every brand of gluten free pasta has different cooking directions based on the ingredients the pasta is made with, so definitely read the cooking directions. Read these tips to learn how to keep gluten free pasta from getting mushy.

Tetrazzini photos of steps 7 and 8.

Step 7: Drain the spaghetti in a colander and put it back into the big pot. Pour in the chicken tetrazzini sauce.

Step 8: Add the pasta and chicken mixture to a casserole dish and top with more cheese. Bake for 20 minutes at 375º F until the cheese is bubbly.

Serve it hot with these Roasted Brussels Sprouts with Bacon or these kid-friendly Maple Roasted Carrots.

Meal Prep Instructions:

To meal prep this recipe ahead, I recommend making the chicken and tetrazzini sauce recipe ahead. Because gluten free pasta can be finicky, I would boil the pasta and then mix it all up to bake when you are ready. You can also make this as a freezer meal.

A top view of a baked chicken tetrazzini in a white casserole dish.

You may want to try making homemade Air Fryer Rotisserie Chicken.

Recipe FAQ:

What is the best gluten free spaghetti to use?

I like how Tinkyada and Jovial gluten free pasta hold up to sitting and baking in the sauce. Other brands may work well, but I haven’t tested them in this recipe.

Can you use different pasta shapes?

You can use any pasta you like in this recipe.

What store brands of rotisserie chicken are gluten free?

My favorite gluten free rotisserie chicken is found at Costco. Other stores include Nob Hill (part of Raley’s supermarkets), Safeway (definitely confirm in case there is a regional recipe difference), and at our farmer’s market, Rotti Rotisserie. Note: Whole Food rotisserie is NOT gluten free.

Can you use boiled chicken?

You can use any cooked chicken in this recipe. If you use plain boiled chicken, you may need to add more seasoning to the tetrazzini sauce.

How long will this tetrazzini keep?

This chicken tetrazzini will keep fresh for up to 4 days in an airtight container or up to 4 months in the freezer.

You may also love this one-pot Gluten Free Cheeseburger Pasta recipe.

A forkful of gluten free chicken tetrazzini.

More Gluten Free Chicken Dinners:

If you love chicken as much as we do, check out all of my gluten free chicken recipes. Here are some of my favorites:

Love This Recipe?

If you made and enjoyed this recipe, I would be incredibly grateful if you could leave a comment below. Include which flour blend you used. This helps others know this recipe is delicious. Thank you!

A bowl of gluten free chicken tetrazzini.

Gluten Free Chicken Tetrazzini

Sandi Gaertner
A creamy homemade gluten free chicken tetrazzini recipe. This easy chicken spaghetti casserole makes a delicious family dinner.
5 from 8 votes
an egg free allergen icon
gluten free allergy icon
nut free allergen icon
soy free allergy icon
Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes
Course Gluten Free Dinner Recipes, Gluten Free Pizza and Pasta Recipes, Meal Recipes
Cuisine American
Servings 8
Calories 541 kcal


  • Soup pot


  • 2 cups rotisserie chicken * see note
  • 1 cup sliced mushrooms
  • cup onion diced
  • 1 tablespoon light oil
  • 3 garlic cloves minced
  • ½ cup heavy cream
  • 1 ½ cups milk
  • 2 cups chicken stock low sodium
  • 3 tablespoons tapioca starch * see note
  • 1 teaspoon salt
  • ½ teaspoon ground pepper
  • 1 ¾ cups cheese I used cheddar
  • 1 package gluten free spaghetti * see note
  • 1 teaspoon light oil for the pasta water


  • Preheat the oven to 375º F.
  • Put a large pot of water to boil. Add 1 teaspoon light oil to the water.
  • In a skillet, add a tablespoon of oil and heat 1 minute. Add the onion and garlic. Sauté for 5 minutes. Add in the mushrooms and cook on medium heat until softened.
  • Stir in the tapioca starch into the vegetables. This will prevent lumps when you add the liquids.
  • Add the rest of the liquid ingredients and half the cheese and mix. Add the rotisserie chicken and mix well. Bring to a boil.
  • Cook the spaghetti, but cook it for 1 minute less than the package directions. This will help the spaghetti hold up to being baked in the sauce better.
  • Turn the heat on the chicken mixture down to low heat and simmer for 5 minutes.
  • Drain the spaghetti in a colander and pour it back into the pot. Pour the chicken mixture over the pasta and mix it well.
  • Pour the tetrazzini into a casserole dish and top with the remaining shredded cheese. Bake at 375º F for 20 minutes until the cheese is bubbly. Serve hot.


  1. I love to use leftover rotisserie chicken in this recipe. You can use any leftover chicken, but if you use boiled chicken, you will need to adjust the seasonings in the casserole.
  2. Tapioca starch is just one gluten free option as a thickener. You can also use cornstarch, potato starch, or arrowroot starch.
  3. The two brands of gluten free spaghetti I tested in this recipe were Jovial GF and Tinkyada. Both held up well to being baked in the sauce but I highly recommend cooking the pasta one minute less than the package directions.
  4. You can use any cheese depending on the flavor you like for this chicken tetrazzini. I have used cheddar, pepper jack, and a Mexican cheese blend.
Many ask what brands of rotisserie chicken are gluten free. My first choice is Costco because their rotisserie chickens are gluten free. Nob Hill (part of Raley’s grocery chain) and Safeway (part of Albertson’s grocery chain) do not use gluten in their rotisserie chickens, but it is always best to ask in the store in case the suppliers they use are different.


Please know that every gluten free flour blend has a different starch to grain ratio. If you use a blend I didn’t test, you may need to adjust your moisture levels in your baked goods.


Serving: 1gCalories: 541kcalCarbohydrates: 50gProtein: 31gFat: 25gSaturated Fat: 12gCholesterol: 109mgSodium: 793mgPotassium: 214mgFiber: 1gSugar: 4gVitamin A: 543IUVitamin C: 1mgCalcium: 246mgIron: 1mg
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Nutrition Disclaimer

Nutritional information is an estimate provided to you as a courtesy. You should calculate the actual nutritional information with the products and brands you are using with your preferred nutritional calculator.

This post was updated from an older February 2021 post with more recipe details

5 from 8 votes (3 ratings without comment)

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Recipe Rating


  1. 5 stars
    Really good, I halved the recipe for the two of us and it worked perfect. One alteration was I had GF fettuccini noodles from Trader Joe’s and used that instead of spaghetti noodles. Also cooked them one minute less that stated and the texture was perfect after baking. Will definitely add to the dinner rotation schedule.

  2. Has anyone substituted cauliflower rice for the spaghetti? Just curious how that would work.

  3. 5 stars
    I made the Tetrazzini with left over turkey and used Barilla spaghetti noodles. I followed the recipe exactly, no need to change it, it it delicious. My hubby says it’s a keeper. Oh, and I only boiled the noodles for 9 minutes.

      1. I just saw the link again that I followed to get to this recipe. It is a what to do with left over turkey! Haha. That tells you how crazy my life is right now. Haha. I am going to make this on Friday. It sounds yummy. Have a happy Thanksgiving.

  4. 5 stars
    Love the recipe.
    I made it using GF FETTICINE instead of regular spaghetti.
    I would add more chicken next time as mine didn’t seem to have that much in it.

  5. 5 stars
    Sounds delicious. And quite easy to make. I will have to make this for my family. Thank you for this lovely recipe!