This Instant Pot Chicken Mac and Cheese is the midweek meal that feels like a hug. It cooks fast, cleans up easier than a stove-top version, and gives you tender chicken folded into cheesy pasta in under half an hour of active time. No babysitting a boiling pot; the pressure cooker does the heavy lifting while you handle the finishing touches.
I love this for weeknights when we need something filling and unfussy. There’s real comfort here: sharp cheddar, a little butter, a whisper of nutmeg for depth, and cream to bring it all together. The Instant Pot gets the pasta and chicken perfectly cooked in one vessel, which means fewer dishes and more dinner time.
Below you’ll find exactly what to gather, the precise Instant Pot steps (as written), and practical tips to make it reliably creamy every time. Read through once, then cook—this one rewards straightforward execution.
What You’ll Gather
Gather the pantry and fridge items listed below and have your Instant Pot ready. Dice the onion, cube the chicken, and shred the cheddar before you start. A little prep up front makes the process smooth and fast once the pot is hot.
Ingredients
- 4 cups (400 grams) pasta — dried; the core of the dish, choose a short pasta like macaroni or shells for best sauce retention.
- 2 tablespoons vegetable oil — for sautéing the onion and chicken so they develop flavor.
- 1 onion — diced; softens and adds sweet onion flavor.
- 2 cloves garlic — minced; adds aromatic depth.
- 1 pound (500 grams) chicken breasts — boneless and skinless, cubed for quick, even cooking.
- 2 tablespoons butter — helps finish the sauce and adds richness.
- ¼ teaspoon ground nutmeg — a subtle warm note that elevates the cheese sauce.
- 1 teaspoon salt — seasons the dish; adjust to taste.
- ¼ teaspoon ground black pepper — for mild heat and seasoning balance.
- 2 cups (475 ml) vegetable stock — add more if needed to cover the pasta; cooks the pasta and keeps the chicken moist.
- 1 cup (236 ml) heavy cream — enriches the sauce and helps it stay silky.
- 2½ cups (250 grams) sharp cheddar cheese — shredded; melts into the sauce for classic sharp mac and cheese flavor.
Cooking (Instant Pot Chicken Mac and Cheese): The Process
- Press SAUTE on the Instant Pot. When the display reads HOT, add 2 tablespoons vegetable oil. Add the diced onion and cook, stirring occasionally, until soft and translucent (about 3–4 minutes).
- Add the minced garlic and cook, stirring, until fragrant (about 30–60 seconds).
- Add the cubed chicken breasts, then sprinkle 1 teaspoon salt and 1/4 teaspoon ground black pepper over the chicken. Saute, stirring, until the chicken is opaque on the outside (about 3–4 minutes).
- If there are browned bits stuck to the bottom of the pot, pour a small splash of the vegetable stock into the pot and scrape the bottom with a wooden spoon to deglaze.
- Press CANCEL to turn off SAUTE. Add the 4 cups dried pasta in an even layer, then add 2 tablespoons butter and 1/4 teaspoon ground nutmeg. Pour in the 2 cups vegetable stock and gently stir to combine. Make sure the pasta is submerged in the liquid; add a little more vegetable stock if needed to cover the pasta.
- Secure the lid and set the valve to SEALING. Select PRESSURE COOK/MANUAL on high pressure and set the time for 5 minutes. (The Instant Pot will take about 10 minutes to come to pressure.)
- When the cook time ends, perform an immediate (quick) release by carefully turning the valve to VENTING. When the steam has fully released and the float valve drops, open the lid away from your face.
- Stir the pasta and chicken to combine. Pour in 1 cup heavy cream and stir to incorporate.
- Add 2½ cups (250 grams) shredded sharp cheddar and stir until the cheese is completely melted and the sauce is smooth and creamy.
- Serve immediately.
Top Reasons to Make Instant Pot Chicken Mac and Cheese
- Speed: With only a few minutes of active cooking and a short pressure time, dinner comes together fast.
- One-pot cleanup: Sauté, pressure-cook, and finish the sauce in the same pot.
- Family-friendly: It’s creamy, cheesy, and comforting—loved by kids and adults alike.
- Protein + carbs in one: The cubed chicken makes it a complete meal without extra sides.
- Consistent results: The Instant Pot removes much of the guesswork involved in timing the pasta.
- Customizable: Easy to adapt with add-ins, swaps, or different cheeses to suit what you have on hand.
Vegan & Vegetarian Swaps
For a vegetarian version, swap the chicken for sautéed mushrooms, roasted cauliflower florets, or extra vegetables like peas and spinach. Use vegetable stock (already in the recipe) and replace heavy cream with a plant-based thickening such as full-fat coconut milk for creaminess; note coconut will add its own flavor. Switch the cheddar for a dairy-free cheese that melts well, or make a cashew-based cheese sauce if you prefer whole-food swaps.
Must-Have Equipment
- Instant Pot (6-quart or larger recommended) — to execute the one-pot pressure-cooking method reliably.
- Sharp chef’s knife and cutting board — for dicing the onion and cubing chicken quickly and safely.
- Wooden spoon or silicone spatula — for deglazing and stirring without scratching the pot.
- Box grater (if shredding cheese) — freshly shredded cheese melts smoother than pre-shredded varieties.
Avoid These Mistakes
- Overfilling the pot: Keep to the recipe’s quantities; too much pasta or liquid can interfere with pressure building.
- Forgetting to deglaze: If browned bits remain, pressure can detect a burn and halt the cook. A small splash of stock and a scrape prevents that.
- Using pre-shredded cheese with anti-caking agents: Those powders stop the cheese from melting smoothly. Freshly shred the cheddar for a creamier finish.
- Not fully submerging pasta: If pasta is above the stock, it cooks unevenly. Add a splash more stock to cover before sealing.
- Skipping the quick release: This recipe relies on immediate release to keep the pasta from overcooking; follow the timing precisely.
Variations by Season
Spring: Fold in blanched asparagus tips or peas at the end for brightness. A little lemon zest stirred in at the end lifts the dish.
Summer: Add halved cherry tomatoes and a handful of fresh basil after the cheese melts for freshness and color. Grill or roast chicken breasts instead of cubing raw ones for a smoky note.
Fall: Stir in roasted butternut squash cubes and swap half the cheddar for Gruyère for a slightly nutty profile. A pinch more nutmeg complements autumn flavors.
Winter: Mix in wilted spinach and a small spoonful of Dijon mustard for warmth and depth. Top with breadcrumbs briefly browned under a broiler for a textural contrast.
Cook’s Commentary
I make this recipe when evenings are busy but I still want a satisfying, homemade meal. The trick is timing your prep: dice your onion and cube the chicken before you hit SAUTE so everything moves quickly. Freshly shredded cheese is non-negotiable if you want that smooth, glossy sauce.
Nutmeg here plays a subtle role. It doesn’t make the dish taste like pumpkin spice; it simply gives the dairy-based sauce a rounder, warmer flavor. Use it sparingly.
If your family prefers a thinner sauce, reduce the cheese slightly or stir in an extra splash of stock or cream. For a thicker, chewier finish, let it rest a minute or two before serving so the sauce settles.
Make-Ahead & Storage
Cool leftovers quickly and store in an airtight container in the refrigerator for up to 3 days. Reheat gently on the stove over low heat, stirring in a splash of milk or cream to revive the sauce. Microwave works in a pinch; cover and stir every 30–45 seconds so the reheating is even.
To freeze, cool completely and transfer to a freezer-safe container for up to 2 months. Thaw overnight in the fridge before reheating. Expect a slight change in texture from freezing; extra cream or a bit of butter stirred in while reheating helps restore creaminess.
Helpful Q&A
Q: Can I use a different pasta shape?
A: Yes. Short shapes that hold sauce (elbows, shells, rotini) work best. Long pastas aren’t ideal for a one-pot, pressure-cooked method.
Q: Can I use chicken thighs instead of breasts?
A: Boneless, skinless thighs will work and stay moist; adjust your sauté time just until they turn opaque before sealing.
Q: My sauce separated—what happened?
A: Overheating the cheese or using pre-shredded cheese can cause separation. Remove from heat, stir in a splash of cream, and gently return to low heat to coax it back together.
Q: Do I have to use heavy cream?
A: Heavy cream gives the richest, creamiest result. You can substitute evaporated milk or a full-fat plant milk for a lighter or dairy-free option, but the texture will change.
Serve & Enjoy
Serve straight from the pot while the sauce is still glossy and warm. A simple green side—steamed broccoli, a peppery arugula salad, or crisp cucumber salad—balances the richness. If you like, finish plates with a sprinkle of chopped parsley, an extra grating of black pepper, or a dusting of smoked paprika for color.
This Instant Pot Chicken Mac and Cheese is reliable, comforting, and flexible. Follow the steps as written for predictable results, then tweak to match your family’s taste. Put it on the table, sit down together, and enjoy the ease of a real, satisfying dinner.
Instant Pot Chicken Mac and Cheese
Ingredients
Ingredients
- ?4 cups 400 gramspastadried
- ?2 tablespoonsvegetable oil
- ?1 oniondiced
- ?2 clovesgarlicminced
- ?1 pound 500 gramschicken breastsboneless and skinless, cubed
- ?2 tablespoonsbutter
- ?1/4 teaspoonground nutmeg
- ?1 teaspoonsalt
- ?1/4 teaspoonground black pepper
- ?2 cups 475 mlvegetable stockadd more if needed to cover the pasta
- ?1 cup 236 mlheavy cream
- ?2 1/2 cups 250 gramssharp cheddar cheeseshredded
Instructions
Instructions
- Press SAUTE on the Instant Pot. When the display reads HOT, add 2 tablespoons vegetable oil. Add the diced onion and cook, stirring occasionally, until soft and translucent (about 3–4 minutes).
- Add the minced garlic and cook, stirring, until fragrant (about 30–60 seconds).
- Add the cubed chicken breasts, then sprinkle 1 teaspoon salt and 1/4 teaspoon ground black pepper over the chicken. Saute, stirring, until the chicken is opaque on the outside (about 3–4 minutes).
- If there are browned bits stuck to the bottom of the pot, pour a small splash of the vegetable stock into the pot and scrape the bottom with a wooden spoon to deglaze.
- Press CANCEL to turn off SAUTE. Add the 4 cups dried pasta in an even layer, then add 2 tablespoons butter and 1/4 teaspoon ground nutmeg. Pour in the 2 cups vegetable stock and gently stir to combine. Make sure the pasta is submerged in the liquid; add a little more vegetable stock if needed to cover the pasta.
- Secure the lid and set the valve to SEALING. Select PRESSURE COOK/MANUAL on high pressure and set the time for 5 minutes. (The Instant Pot will take about 10 minutes to come to pressure.)
- When the cook time ends, perform an immediate (quick) release by carefully turning the valve to VENTING. When the steam has fully released and the float valve drops, open the lid away from your face.
- Stir the pasta and chicken to combine. Pour in 1 cup heavy cream and stir to incorporate.
- Add 2½ cups (250 grams) shredded sharp cheddar and stir until the cheese is completely melted and the sauce is smooth and creamy.
- Serve immediately.
Equipment
- Instant Pot
Notes
Depending on how salty your cheese is, your Mac and cheese may and may not need more salt. So at the end justhave a taste, and see if you need to add more salt or black pepper.
Feel free to add broccolito the mac and cheese at the end. Or check out myInstant Pot broccoli mac and cheese recipe.
If you have leftovers for the next day,reheat in the Instant Potby adding a little bit of water and press on SAUTE. Let it heat up while stirring with a wooden spoon. Once it’s warm enough, remove the IP inner pot from the IP to avoid burning the mac and cheese at the bottom of the pot.
If you like spice,you can add a little bit of cajunto the mac and cheese.
If you don’t have cream, then you can use a smaller amount of full-fat milk or evaporated milk.
I recommend buying a block of cheddar and shred it yourself rather than buying shredded cheese as it will melt better.
To get some stringy cheese, I sometimes add about 1/2-3/4 of a cup of shredded mozzarella cheese.
You can add more chicken to the recipe if you like, this won’t change the cooking instructions.
