If you’re looking for the ultimate Instant Pot mac and cheese recipe, look no further. Made with three types of cheese, this mac and cheese is super creamy with amazing depth of flavour. It’s an easy, crowd-pleasing one-pot dish!
You may also be interested in these easy Instant Pot no-drain mashed potatoes with 3 flavour options!
There’s so much to love about this recipe. It’s perfect as a holiday side dish or when you want a step up from regular boxed mac and cheese.
- One pot is all you need! Pasta is one of my favourite things to make in the Instant Pot, because there’s no need to drain the water.
- Never fail to get the creamiest cheese sauce.
- Wow your family and friends with the flavour of the sauce. The three cheeses and seasonings give this Instant Pot macaroni a “definitely homemade” taste.
Here’s what you’ll need to make creamy Instant Pot Mac and Cheese. Be sure to check out the recipe card below for the detailed quantities and instructions!
- Elbow noodles – or your favourite short noodle. See the tips below for substituting different pasta varieties, as your noodles may have a different cook time.
- Garlic powder – for flavour
- Dry mustard – also called mustard powder, this ingredient really improves the taste!
- Cheddar Cheese – freshly grated for the best melted texture
- Sharp Cheddar – freshly grated; sub more regular cheddar cheese if you don’t have this on hand, but I highly recommend using sharp for the tangy flavour!
- Cream – we use half and half, but you could use milk for a lighter option.
- Boursin cheese – this makes the sauce, in my opinion. It gives even more creaminess to the sauce and adds another layer of flavour (we use the Shallot and Chives variety). If you’re unable to find this ingredient, you can substitute regular cream cheese.
How to make it
Pressure cook the noodles. Place the noodles in an even layer in the Instant Pot insert, then pour in the water and add the garlic powder, dry mustard and salt. Pressure cook on High for 3 minutes (or the appropriate time for your specific noodle – see below for calculation).
Quick release and stir in the butter. At the end of cooking time, quick release the pressure, give the noodles a stir and add the butter. Stir until it’s melted.
Add the cheeses and cream. Add the grated cheeses in batches (it melts more easily this way), then add the cream and Boursin. Stir until creamy and season with salt and pepper, to taste. Serve!
Frequently asked questions
No, do not use pre-grated cheese in this recipe. These cheeses have preservatives that prevent the cheese from clumping in the package, which prevents them from melting nicely into the sauce. Freshly grated will give you a much better result; you don’t want gritty or grainy sauce!
Sharp cheddar adds a stronger, more complex flavour to the sauce, but you can substitute for more regular cheddar if that’s what you have on hand.
If you don’t have dry mustard on hand, you can use 1 tablespoon of regular prepared Dijon mustard. It’s also fine to skip it completely.
Regular cream cheese is a good substitute – use the same amount. I like to soften regular cream cheese a bit to make stirring it in a bit easier. Twenty seconds in the microwave does the trick, or you can leave it out at room temperature for 30 minutes to an hour.
Yes! To substitute a different noodle, use the same amount of pasta by weight (one pound) and adjust the cook time according to this equation: lowest cook time on package divided by two. For example, if the cook time on your package is 10-12 minutes, pressure cook on High for 5 minutes (10 divided by 2).
Place a serving in a bowl and add 1 to 2 tablespoons of milk to revive the sauce. Cover with a plate and microwave for one minute. Stir, cover again and continue to heat it in 30 second intervals, until it reaches your desired temperature. Use oven mitts to remove the plate, it gets hot!
In a sauce pan, add 1 to 2 tablespoons of milk per cup of leftover mac and cheese. Reheat over medium-low heat, stirring frequently, until it’s warmed through. Add more milk as necessary to reconstitute the sauce.
More Instant Pot recipes
- Instant Pot Chili Mac and Cheese
- Instant Pot Cheesy Chicken and Rice
- Instant Pot Lemon Asparagus Risotto
- Instant Pot Butternut Squash Risotto
- Instant Pot Mashed Cauliflower
Instant Pot Mac and Cheese
- 1 lb small elbow noodles
- 4 cups water
- 1 teaspoon garlic powder
- 1 teaspoon dry mustard
- ½ teaspoon sea salt (plus more to taste after cooking)
- 3 tablespoons butter (43g)
- 2 cups freshly grated cheddar cheese
- 1 cup freshly grated sharp cheddar (or sub more regular cheddar cheese)
- 1 package Boursin cheese (5.3 oz / 150 g) (I used the shallot and chives flavour. You can also sub same amount of cream cheese. )
- 1 cup half and half cream (or whole milk for a lighter option)
- Ground black pepper (to taste)
- Place the uncooked noodles in the Instant Pot insert in an even layer, then add the water, garlic powder, mustard powder and sea salt.
- Close the lid and set the vent to sealing. Pressure cook on Manual High pressure for 3 minutes, or half of the lowest cook time on the package of your particular noodle (see note 1). Your Instant Pot may have a "Pressure Cook" button rather than a "Manual" button, depending on the model. It will take about 15 minutes to come to pressure.
- At the end of cooking time, quick release the pressure. Give the noodles a stir, then add the butter. Stir until the butter has melted.
- Mix in the grated cheese in batches, until melted, then add the cream and Boursin. Stir until creamy. Season to taste with salt and pepper.
- Serve immediately. Store any leftovers in the refrigerator and eat within 4 days.
- Check your pasta package to be sure you’re using the right cook time. Cook time is the lowest time on the package, divided by two. For example, my package has a suggested cook time of 6-8 minutes, so my cook time is 6 minutes divided by 2 = 3 minutes.
- This recipe was tested in both 6-quart and 8-quart Instant Pot models.
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I’d love to hear from you!
Hey, I’m Laura!
Creator of The Recipe Well
I love food and cooking, but hate doing the dishes. I use my nutrition degree to create easy, approachable recipes that will help you find your happy place in the kitchen.