Close the lid. Press PRESSURE COOK and cook on HIGH for 5 minutes. Allow the pot to release pressure naturally for 10 minutes, and then release all remaining pressure.
Remove the pan with the cabbage, chop and set aside.
Drain the potatoes.
Place potatoes, butter, 1.5 teaspoon salt, pepper, cream and nutmeg into the bowl of a stand mixer and whip the potatoes until creamy (you can also use a hand mixer and whip the potatoes in the Instant Pot itself).
Stir in cabbage and the green onions.
When ready to serve, make a well in the center of each bowl. Fill each well with additional melted butter.
TIPS & TRICKS FOR PERFECT INSTANT POT MASHED POTATOES
Chunky Cabbage. Leave the cabbage in large chunks, else you risk overcooking it. What works for me is to core it, and then cut into quarters.
Kale. If you'd prefer to use kale in place of cabbage, simply steam the kale a little by either doing so in the microwave or by adding the kale to the Instant Pot after the potatoes are done. Simply close the lid on the pot and let it steam for 2-3 minutes in the residual heat.
Creamy. I suggest you use Yukon gold potatoes or Russet Potatoes, as they are the best potatoes for making the best mashed potatoes.
Cutting into cubes. Notice I ask you to cut the potato into cubes before you start. This is because cook time for potatoes in an electric pressure cooker varies a lot depending on how thick they are. By precutting them to an even size, you can be assured that each piece will cook evenly.
Not gluey. Ever wondered why your mashed potatoes are gluey? Choosing the best potatoes for mashing is super important. Either you've used the wrong potato, you've gotten too much water into them, or you've overbeaten them.
Yukon Gold or Russet Potatoes are the best potatoes for a delicious mashed potato.
You can use red potatoes for making mashed potatoes, but they have a slightly heavier texture. I like to save my red potatoes for making roasted, smashed potatoes, or these rosemary roasted potatoes instead.
Use the whisk attachment on your stand mixer, a potato ricer, a potato masher, or use a fork and some elbow grease. NOT your food processor.
For ultra fluffy mashed potatoes soak the chopped potatoes in water first, to get rid of some of the starch. You might also want to rinse the potatoes after they're cooked.
Stovetop Irish Mashed Potatoes.
If you'd like to make this on the stovetop, simply cut the potatoes into cubes, and boil the potatoes in a pot until they are done.
Add the cabbage to the pot after the potatoes are finished cooking and cover the pot for 2 minutes to cook the cabbage.
Then simply follow the instructions from step 5 and on for some pretty perfect mashed potatoes.
Check the post for a variety of add-ins to jazz up your homemade mashed potatoes.