Pour the water in the the bottom of the Instant Pot Pressure Cooker.
1 ½ cups water
Set the steamer basket over the water and add the potatoes. Set the pressure cooker for 8 minutes, then quick release (per Instant Pot instruction manual).
3 ½ pounds yellow or Yukon Gold potatoes
While the potatoes cook, soften the butter and goat cheese in the microwave for 1 minute at 30% power. Warm the half-n-half at 50% power for 45 seconds. Set aside until ready to use.
12 tablespoons unsalted butter, 4 ounces goat cheese, 1 cup half-n-half
When the potatoes are ready, use the quick release valve (per manual) to allow the steam to escape.
Mash the potatoes using a potato ricer, masher, or electric hand mixer.
Add the butter and goat cheese and gently mix.
Add the warm half-n-half and gently stir until liquid is incorporated.
Season with salt and pepper.
Kosher salt, Freshly ground black pepper
Serve immediately or keep warm by placing the mashed potatoes back in the empty instant pot on the “keep warm” setting.
At the time of serving, stir the potatoes and add a few more pats of butter.