This is the kind of weeknight dinner that actually feels like a small celebration. It comes together fast in one pot, folds in tender pieces of chicken, and finishes with a glossy, cheesy sauce that clings to every noodle. I test this recipe when I want something dependable, comforting, and fast enough for a busy evening.
There’s no heavy roux or stove-top stirring for ages. The Instant Pot does the heavy lifting: sauté, pressure-cook, and then melt everything into a creamy finish. You’ll appreciate how reliably the timing works, and how easy cleanup is compared with a stove-top pan and a casserole dish.
Read through the ingredients and the step-by-step process once, and you’ll see how straightforward it is. I include practical tips throughout so you can avoid common missteps and get a restaurant-quality texture at home.
What You’ll Gather
Ingredients
- 4 cups (400 grams) pasta, dried — the base; medium shapes like macaroni, shells, or small rigatoni work best to trap the sauce.
- 2 tablespoons vegetable oil — for sautéing the onion and browning the chicken so you get flavor from the Maillard reaction.
- 1 onion, diced — provides sweetness and depth; dice finely so it softens quickly.
- 2 cloves garlic, minced — aromatic; add after the onion to avoid burning and to release flavor.
- 1 pound (500 grams) chicken breasts, boneless and skinless, cubed — protein; cube into bite-sized pieces so they cook evenly and quickly.
- 2 tablespoons butter — enriches the sauce and helps coat the pasta for a silky finish.
- ¼ teaspoon ground nutmeg — a tiny pinch lifts the cheese flavor and adds warmth without tasting “spicy.”
- 1 teaspoon salt — seasons the whole pot; you can adjust at the end if needed.
- ¼ teaspoon ground black pepper — balances the richness with a mild bite.
- 2 cups (475 ml) vegetable stock — cooking liquid for the pasta; add more if necessary to make sure the pasta is covered.
- 1 cup (236 ml) heavy cream — folded in after pressure-cooking to make the sauce luxuriously creamy.
- 2½ cups (250 grams) sharp cheddar cheese, shredded — the primary cheese; shred fresh for the best melt and texture.
Cooking (Instant Pot Chicken Mac and Cheese): The Process
- Press the SAUTE button on the Instant Pot and add 2 tablespoons vegetable oil. Heat until oil is shimmering.
- Add the diced onion and cook, stirring occasionally, until the onion is soft and translucent (about 3–4 minutes).
- Add the minced garlic and cook, stirring, for about 30–60 seconds until fragrant.
- Add the cubed chicken breasts to the pot and season with 1 teaspoon salt and 1/4 teaspoon ground black pepper. Saute the chicken, stirring occasionally, until the pieces are opaque on the outside and lightly browned (about 3–4 minutes).
- If there are browned bits stuck to the bottom of the pot, deglaze by pouring in a small splash of the vegetable stock and scraping the bottom with a wooden spoon to loosen any stuck bits.
- Press CANCEL to turn off SAUTE. Add the 4 cups (400 g) dried pasta, 2 tablespoons butter, and 1/4 teaspoon ground nutmeg to the pot. Pour in 2 cups (475 ml) vegetable stock (add a bit more of the stock if necessary to make sure the pasta is covered).
- Give the ingredients a quick stir to distribute the pasta, butter, and chicken, and press the pasta down so it is submerged in the liquid.
- Secure the lid and set the steam release valve to SEALING. Select PRESSURE COOK/MANUAL (High Pressure) and set the cook time to 5 minutes. The Instant Pot will take about 10 minutes to come to pressure before the cooking time begins.
- When the cook time ends, perform a quick release of the steam (open the valve carefully to release pressure immediately). When the pressure is fully released, carefully open the lid away from your face.
- Stir the pasta and chicken, then add 1 cup (236 ml) heavy cream and stir to combine.
- Add 2½ cups (250 g) shredded sharp cheddar cheese 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: Dinner on the table in about 30 minutes from start to finish.
- One-pot cleanup: Sauté, cook, and finish in the same vessel—less washing up.
- Family-friendly: Familiar flavors that please kids and adults alike.
- Protein and carbs together: Chicken plus pasta makes it a complete, satisfying meal.
- Consistent results: The pressure setting gives reliable pasta texture every time.
Vegan & Vegetarian Swaps
- To make it vegetarian: replace the chicken with roasted mushrooms, tempeh, or extra vegetables (like roasted cauliflower or peas) and keep the rest of the method.
- To make it vegan: use a firm tofu or seitan in place of chicken, swap heavy cream for full-fat coconut milk or a cashew cream, and use a plant-based shredded cheddar alternative. Use a vegan butter substitute instead of butter.
- Use vegetable stock (already in the recipe) rather than chicken stock to keep the base vegetarian-friendly.
Must-Have Equipment
- Instant Pot (or similar electric pressure cooker) — the central tool for this recipe.
- Wooden spoon or heatproof spatula — for deglazing and stirring without scratching the inner pot.
- Measuring cups and spoons — for accurate liquid-to-pasta ratio.
- Box grater (optional) — for freshly shredding cheddar so it melts better and faster.
- Heatproof ladle or large spoon — for serving straight from the pot.
Avoid These Mistakes
- Not deglazing the pot: Burnt bits on the bottom will trigger a burn warning; always scrape them up with a splash of stock before pressure cooking.
- Using oversized pasta shapes: Very large shells or long pasta may not cook evenly in 5 minutes; stick to medium shapes or cut long pasta in half.
- Adding cheese before pressure-cooking: Cheese should be added after pressure release to avoid a grainy texture or separation.
- Overfilling the pot with pasta: Follow the quantities; overcrowding can cause uneven cooking or a starchy mess.
- Skipping the quick release: Letting the pot natural release here can overcook the pasta; follow the quick release instruction for the intended texture.
Variations by Season
- Spring: Stir in blanched peas and chopped asparagus at the end for a bright contrast.
- Summer: Add diced roasted red peppers or sun-dried tomatoes and a handful of fresh basil for freshness.
- Fall: Fold in roasted butternut squash cubes and swap half the cheddar for a nutty Gruyère.
- Winter: Mix in caramelized onions and a pinch more nutmeg; a sprinkle of crispy prosciutto on top adds texture and flavor.
Cook’s Commentary
I like this recipe because it balances convenience and quality. The sauté step builds flavor quickly; browning the small chicken cubes brings more savory depth than simply dumping everything in. The 5-minute pressure cook time is a sweet spot for many dried pastas—tender but not mushy—especially if you press the pasta down so it’s submerged.
When I test this, I pay attention to the final stirring stage. Heavy cream heats the mixture gently and the shredded cheddar melts into a glossy sauce only if you stir patiently. If the sauce seems slightly thin, a minute of resting off heat allows it to thicken. If it’s too thick, a splash more cream or stock loosens it up without losing flavor.
Make-Ahead & Storage
- Refrigerate: Store leftovers in an airtight container for up to 3–4 days. The sauce will firm up and the pasta will absorb liquid.
- Reheat: Warm gently on the stovetop over low heat with a splash of milk, cream, or stock to revive creaminess. Avoid high heat to prevent breaking the sauce.
- Freeze: You can freeze portions for up to 2 months, but texture will change—cheese sauces often separate. Thaw overnight in the fridge and reheat with a liquid addition.
- Make-ahead tip: If making for a crowd, cook through the pressure step, cool, then finish with cream and cheese just before serving to get the freshest texture.
Helpful Q&A
- Q: Can I use chicken thighs instead of breasts?
A: Yes. Boneless skinless thighs work well and stay juicy. Adjust the browning time if pieces are larger. - Q: What if my Instant Pot shows a burn warning?
A: Turn off SAUTE, add a bit more stock, and scrape the bottom to release stuck bits. Then continue with the recipe. - Q: Can I use milk instead of heavy cream?
A: You can, but the sauce will be thinner and less rich. Use whole milk and consider a small slurry of cornstarch if you want more body. - Q: What pasta shapes are best?
A: Medium shapes like elbow macaroni, small shells, or small rigatoni. They cook evenly in the short pressure time and hold sauces well. - Q: Is it possible to double the recipe?
A: You can, but keep Instant Pot max-fill limits in mind. Work within your pot’s capacity to avoid pressure-cooking issues.
Serve & Enjoy
Serve this straight from the pot while it’s still silky and hot. A simple garnish—extra shredded cheddar, a sprinkle of chopped parsley, or a few grinds of black pepper—brightens the bowl. A crisp green salad or roasted vegetables provide contrast in texture and freshness.
This recipe is forgiving and adaptable. Once you’ve made it a couple of times, you’ll know how to tweak the add-ins for your family’s tastes. Enjoy the ease and the cozy, cheesy comfort.
Instant Pot Chicken Mac and Cheese
Creamy Instant Pot chicken mac and cheese made with pasta, sautéed onion and garlic, cubed chicken, vegetable stock, heavy cream, and sharp cheddar.
Servings: 6 servings
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 the SAUTE button on the Instant Pot and add 2 tablespoons vegetable oil. Heat until oil is shimmering.
- Add the diced onion and cook, stirring occasionally, until the onion is soft and translucent (about 3–4 minutes).
- Add the minced garlic and cook, stirring, for about 30–60 seconds until fragrant.
- Add the cubed chicken breasts to the pot and season with 1 teaspoon salt and 1/4 teaspoon ground black pepper. Saute the chicken, stirring occasionally, until the pieces are opaque on the outside and lightly browned (about 3–4 minutes).
- If there are browned bits stuck to the bottom of the pot, deglaze by pouring in a small splash of the vegetable stock and scraping the bottom with a wooden spoon to loosen any stuck bits.
- Press CANCEL to turn off SAUTE. Add the 4 cups (400 g) dried pasta, 2 tablespoons butter, and 1/4 teaspoon ground nutmeg to the pot. Pour in 2 cups (475 ml) vegetable stock (add a bit more of the stock if necessary to make sure the pasta is covered).
- Give the ingredients a quick stir to distribute the pasta, butter, and chicken, and press the pasta down so it is submerged in the liquid.
- Secure the lid and set the steam release valve to SEALING. Select PRESSURE COOK/MANUAL (High Pressure) and set the cook time to 5 minutes. The Instant Pot will take about 10 minutes to come to pressure before the cooking time begins.
- When the cook time ends, perform a quick release of the steam (open the valve carefully to release pressure immediately). When the pressure is fully released, carefully open the lid away from your face.
- Stir the pasta and chicken, then add 1 cup (236 ml) heavy cream and stir to combine.
- Add 2½ cups (250 g) shredded sharp cheddar cheese and stir until the cheese is completely melted and the sauce is smooth and creamy. Serve immediately.
Equipment
- Instant Pot
Notes
If for some reasonyour sauce is still not thick enoughafter you stir in the cheese,just press on sauté and cook for a few minutesand this should solve the problem.
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.
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.
