Creamy, dreamy 5 ingredient Instant Pot Mac and Cheese is so easy to make that you’ll find yourself making it at least once a week! Great as a side, or toss a few steamed veggies in and make it a full meal!

bowls of macaroni and cheese on white speckled surface with tea towel

This is dangerous.

When all you need is five basic ingredients to make instant pot mac and cheese at home, guaranteed you can get into a lot of trouble.

Trouble like, I’ve got all the ingredients on hand, and all I need to do is toss it all into the instant pot, and there comes a perfect side dish for dinner. But also, a complete meal for the little ones in your life that live off a cheese and pasta diet and make the rest of us so envious of their ways.

But it’s also all sorts of wonderful for situations like when you’re headed to Friendsgiving or Thanksgiving party in the next 5 minutes, and you procrastinated until the very last second to come up with something to take with you!

white bowl full of prepared instant pot Mac and cheese on white surface

Instant Pot mac and cheese is the newest addition to my line of instant pot recipes. During the holidays I always get messages from people asking for side dish recipes that can be made in the instant pot or slow cooker so that they don’t take up room in the oven. In the past I’ve done a slow cooker cranberry sauce. Last year, I shared my recipe for garlic and herb mashed potatoes made in the instant pot in 20 minutes! Then there’s also a slow cooker and an instant pot version of butternut squash soup.

So this year, I wanted to do my take on instant pot Mac and cheese, and to my pleasant surprise, I actually like instant pot Mac and cheese better than when it’s made on the stove top or the oven! 

So didn’t see that coming!

measuring cup filled with dry elbow macaroni on white marble

pouring milk into instant pot with cooked elbow macaroni

What size instant pot do I need to make this instant pot Mac and cheese?

I own the 6-quart and made an entire pound of pasta in there without any issues; you could also do this in the 8-quart if that’s what you have. The 8-quart would also hold a double batch of this easily if you’re feeding a crowd!

What are the five must-have ingredients for instant pot mac and cheese?

  • Uncooked elbow macaroni
  • Butter
  • Mustard powder
  • Shredded cheese
  • whole milk or half and half

What other shapes/kinds of pasta can I use?

I know this recipe still works should you decide to use whole wheat macaroni, all you need to do is up the pressure cooking time to 5 minutes. But unfortunately, I haven’t had much luck with using gluten-free pasta in the instant pot. If you decide to change the shape of the pasta, the pressure cooking time may change, and I’m not sure how much longer it’ll take, and it may require a little trial and error on your part.

For best results, I suggest using good ol’ macaroni! 

prepared instant pot Mac and cheese in instant pot with wooden spoon

What kind of cheeses works well for homemade mac and cheese?

  • cheddar cheese
  • mozzarella
  • Monterey Jack
  • provolone
  • havarti
  • gouda
  • gruyere

Even though parmesan isn’t a cheese that you often see in traditional mac and cheese recipes, it’s something that I like using here. But just keep in mind that you don’t want to use more than about ¼-⅓ cup of it here. It’ll add a whole lot more salt to the mac and cheese otherwise. Also, your ratio of white to yellow cheese is higher, your mac and cheese may not be as yellow!

Tips for making the best instant pot Mac and cheese:

There are a ton of ways to make this simple recipe even better, here’s what I like to do:

  • Don’t shy away from seasonings. Swap the salt for garlic salt (when do I not love garlic in everything, right?)
  • Add a chicken bouillon cube in with the pasta to help flavor the mac and cheese even more or swap half of the water for chicken broth. Just be sure to not replace all the water with chicken broth here without reducing the salt because otherwise the mac and cheese will be way too salty. 
  • Swap the whole milk for half and half to make this even more luxurious! It’s not something I do often, but if you’re serving this to a crowd, the half and half will make this even better!
  • Use a variety of cheeses. Sure regular old cheddar will do the trick, but when you swap out a cup for something like gouda or Havarti, the blend of flavors really make this taste so much more delicious. Just be sure to stir constantly while you melt the cheese in because something like mozzarella or provolone could leave you with cheese bombs if you don’t mix them in well!
  • Don’t use pre-shredded cheese. I say this way too often, but pre-shredded cheeses are often coated with anticaking agents (such as potato starch) so that it doesn’t become a massive clump of cheese in the package. For best results, I suggest using a block of cheese and shredding it yourself! Generally, an 8-ounce block gives you 2 cups of shredded cheese.

speckled dish filled with prepared creamy cac and cheese

How to make the best instant pot Mac and cheese:

  1. Toss the macaroni, water, butter, salt, and mustard powder into the IP and let it cook
  2. Stir in the milk and cheese
  3. Fill up a bowl and eat it while it’s all warm and gooey!

And here’s my best tip for success: repeat steps 1-3 often 😉

side shot of bowls full of macaroni and cheese

Yield: 8 small or 6 large servings

5-Ingredient Instant Pot Mac and Cheese

Prep Time 7 minutes
Cook Time 8 minutes
Total Time 15 minutes

Creamy, dreamy 5 ingredient Instant Pot Mac and Cheese is so easy to make that you’ll find yourself making it at least once a week! Great as a side, or toss a few steamed veggies in and make it a full meal!

5-Ingredient Instant Pot Mac and Cheese

Ingredients

  • 1 pound uncooked elbow macaroni
  • 4 cups water (or ½ chicken stock + ½ water)
  • 4 tablespoons salted butter, cut into small pieces
  • ¾ teaspoon salt (or garlic salt!)
  • ½ teaspoon dried mustard powder
  • 3 cups shredded cheese
  • 1 1/4 cup whole milk or half and half

Instructions

  1. PRESSURE COOK: Add the elbow macaroni, water (or stock), butter, salt, and mustard powder to the instant pot. Stir to combine, cover, make sure the instant pot vent is sealed. Program the IP to manual high pressure for 4 minutes. Once the timer goes off allow the pressure to release naturally for 4 minutes. If you do a manual pressure release immediately, just know that some of the hot liquid may sputter out from the vent.
  2. FINISH: With the Instant Pot on the ‘keep warm’ setting, stir in the shredded cheese and milk. Continue stirring until all the cheese is completely melted. Taste and adjust salt and pepper as desired and serve warm!

Have you made this recipe?

I’d LOVE it if you could take a second to rate this recipe and leave a comment below. You can also share a picture on Instagram with the hashtag #LITTLESPICEJAR 🙂

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