Step 1

Add 1 cup water to the pressure cooking pot. Put a steamer basket in the pot and place the potatoes in the basket.

Step 2

Lock the lid in place. Select High Pressure and 5 minutes cook time.

Step 3

When the cook time ends, turn off the pressure cooker. Use a quick pressure release.

Step 4

When the valve drops, carefully remove the lid. Use a fork to test the potatoes. If needed, relock the lid and cook at High Pressure for a few minutes more.

Step 5

Transfer the potatoes to a large serving bowl. Use a ricer or potato masher to mash the potatoes until mostly smooth. Mash in the butter. Gradually stir in the milk. Season with salt and pepper to taste.